Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Thursday, November 19th, 2020
Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp

NEW Dynaco 70 / Dynakit Stereo 70 – 6GH8A TUBE VERSION. This Listing is for. Custom Built by Funtastic Vintronics. Turnaround time is 3 weeks or less. These are brand new amps – 100% – not a rebuild or a restoration – read the details. Enjoy the rich smooth tones of analog audio and even order harmonics that only vacuum tube amplification can produce. It reveals musical qualities with fantastic realism and depth you may have never imagined possible. The legendary original design up to date with highly improved levels of sound quality, looks and performance. Because of the ST-70′s naturally high impedance (470K) it is compatible with virtually any solid state or tube preamp. This amplifier puts out 70 watts total, 35 watts per channel. It is fairly safe to say that most people today would have no idea of how wonderful a Stereo 70 amplifier is capable of sounding like. “Original condition” amps or those “updated” or having any number of “modifications” from mild to wild can still leave a lot to be desired. “Restored” is more than popping in a few capacitors and some tubes. Much more will need to be done to fully bring about that great sound the amp once had. Although they will play music, they are still incapable of reproducing the sound quality they possessed when new, 50 years ago unless they are fully restored. Resistors become noisy and drift out of tolerance due to age and heat. Circuit board and component materials begin to deteriorate causing signal degradation, solder joints and tube sockets can be loose, oxidized, worn and have poor quality connections causing signal interference and noise. Capacitors lose their range and clarity, their values having changed with time. Hiss, buzz, hum, pop and fuzziness are not normal or desirable qualities. Isn’t the great smooth sound of a time long gone by what you’re really after, those sweet tones produced only from tube amplification? Like a musical time machine, this amplifier will take you back to the beginning, like when these amps were new. But there’s even more to consider here. All of the components used in this amplifier have greatly improved characteristics over the ones available and used 50 years ago. That makes the sound quality of this amp even better than one would have been then, as a new one 50 years ago. Take a good close look at this one. Don’t cheat yourself out of what you’re really wanting; superb sound, high build quality, safe and reliable operation, great looks and that comforting pride of ownership. Mundorf MCap ZN Capacitors – 600v – 5% – Values are increased to. 1uf for Improved Bass Response. PRP Audio Grade Resistors – High Resolution – 500v Rated – 1% Accuracy – Ultra Low Noise. 70 Watts Total Output – 35 Watts Per Channel – Pure Real Analog Power. Genuine Dynakit PC-3 “B” Circuit Board – Made Specifically for 6GH8A Driver Tubes – No tube Adapters here. Includes (2) tightly test matched Vintage NOS 6GH8A by RCA, GE (as per availability). Includes (4) New EL34 / 6CA7 NessTone Output Tubes – Plate Current Matched – Amazing Sound. Includes (1) New 5AR4 / GZ34 Rectifier Tube – Groove Tubes Label – Soft Start – High Current Capability. Bias Circuit uses 100uf Capacitors with Flameproof Metal Oxide Resistors. Dynakit PA-060 Power Transformer (120v Windings) – Notice its Size, the Increased Lamination Stack! Dynakit A-470 Output Transformers – (4,8,16 Ohm Taps) – Grain Oriented Laminations – Interleave Wound. Dynakit C-354 Shielded Power Supply Filter Choke – (1.75 Henries, 62 Ohms, 10%) – No More Nasty Leaks. 9 Brand New High Quality Tube Sockets. 600v & 1000v Wiring Used Throughout the Entire Amp. Genuine Dynakit Multi Section Filter Capacitor – Factory Correct Values 80/40/30/20uf – 525v Rated. New Dynakit Stainless Steel Mirror Finish Chassis (Non-Magnetic) – Beautiful Museum Quality Look. Brand New Dynakit Perforated Steel Cover w/ matching badge. Power Supply has Diode Rectification – No Scary Old Outdated Selenium Rectifier Here! Flashback Prevention Safety Diodes Installed at the Rectifier Tube. Additional shielding on under chassis components to reduce EMI / interference. Careful wire routing to reduce movement & electromagnetic signal interference (EMI). Assembled With Alpha Fry 60/40 rosin core solder – for the Very Best Quality Connections. Power Transformer Isolation Bushings Installed – Prevents the Transfer of Mechanical Hum to the Chassis. Custom Silver RCA Input Jacks – Wider Spacing for Larger Modern Input Cables. Original Screw Style Speaker Output Terminals – Vintage Correct – Full Function (4,8,16 Ohm + Common/Ground). Heavy Duty Rubber Feet with Steel Bushings. Assembled with Great Attention to Detail Using High Quality Parts – 48 hr Minimum Burn in Tested – Sounds Incredible. Operates From a Standard Wall Outlet – No Voltage Reducer or Variac Needed – Built for Today’s 120v+ Voltages. Arrives With Bias Preset. Just Install the Tubes – Simple To Do – Instructions are Included. Front Preamp Sockets are Wired for Bias Set Only – Reduces Audio Signal Interference. The photos seen here are of several different amplifiers, meant to provide an example of the units. Yours will look like the ones in these photos. Vintage Vibe – Modern Reliability – The Beautiful Sound of Tubes. So how does it sound? Magical – very musical with a highly detailed voice and plenty of solid, clean wonderful bass. This amp is absolutely dead quiet – no hum, no buzz, no hiss, no snap-crackle-pop! It sounds like it is supposed to. If you’re in search of that golden age of audio sound with stunning vintage looks, you’ve just found it. This is your bad boy. This is a 100% brand new amp, a very high quality build, total listening satisfaction. This ST-70 delivers dramatically improved sonics as the result of being carefully and thoughtfully built, all new, from the ground up, with technologically advanced components and all high-end parts. Is used with only a couple of re-engineered elements on the PCB traces to accommodate the 6GH8A tubes without having to use an adapter. Pay particular attention to the size (height) of the power transformer on this amp (the middle one). Transformers are the heart and soul of a tube amp, period. Dynaco wasn’t messing around when they designed and built their originals. Notice how tall this new transformer is compared to the original Dynaco PA060 power transformer. This is a real case of bigger is better. These new Dynakit transformers were reverse engineered from the original Dynaco designs using modern technologies and insulations. An increased lamination stack on this power transformer allows it to run cooler and provide better regulation. These transformers wont buzz or hum like the originals often do either. A major factor to consider here too is that the original transformers were designed to run from yesterday’s 117 Volt household current. Today’s household current is often 125 Volts or more so the use of a “step down” or “bucking” transformer is necessary to retard the voltage down to a safe operating level for amps having the original transformers. The new transformers are made for today’s higher household currents or VAC (Voltage). These transformers can be operated directly from your household outlets without secondary devices needed to reduce the voltage. These are USA made transformers that meet and exceed every aspect of the originals. If there were some sort of “magic” in the use of cloth leads, Dynakit would have certainly insisted on using them again. There’s simply no magic in cloth covered lead wire, period, it is inferior. In any comparison, these new transformers are just better than those old originals. Modern advancements in materials, methods and technologies used in the production of these transformers has resulted in superb transformers that operate quieter and cooler than the originals while providing less distortion, more power with increased reliability. The new A470 output transformers are also greatly improved, like the power transformer. The output transformers are interleaved/layer-wound and incorporate high quality M-6 grain oriented laminations. These also use better quality wire with better insulation, the primary is wound the same as the original A470 using the same number of turns on the same number of sections. These are made using the same patented Dynaco winding method, and made on the same core size and material type as the originals. These transformers are in one word, exceptional. I have selected the Groove Tubes 5AR4/GZ34 as the rectifier tube in my Dynaco 70′s for more than 2 years now. It has the highest current capability and has been 100% reliable, it also looks right in the amp. I believe it to be the best current production rectifier tube of its type on today’s market. Same story for the NessTone EL34/6CA7 tubes, they’re all I use now. These output tubes are hand selected and tested here in the USA and then identically matched as a quad (4 tubes) by their plate current test. Results using the ROE computerized testing system. I have had nothing but satisfied buyers and zero failures, they sound amazing. This amp also comes with 2 NOS RCA, GE or similar (as per availability) 6GH8A tubes, tested and matched. The 6GH8A like the 7199 tube is a vacuum tube combining both a pentode and triode in a single glass envelope. Each section has a separate cathode and is electrically independent, the pentode is used for the input stage, and the triode as a phase inverter. The Dynaco ST-70 Series II came from the factory with a 6GH8A driver board and tubes. According to Dynaco published research and literature the 6GH8A tube actually outperformed the 7199! I also offer this amp in a 7199 version, identical in build with the exception of the 7199 driver board and tubes. The photos show the ST-70 using the updated Dynakit PC-3 board made for 6GH8A tubes. Amplifier makers like HH Scott, Harman Kardon and Eico, among others, have used the 6GH8A since back in the late 50′s. I honestly find no audible difference in the 7199 and the 6GH8A so long as both tubes are of equal quality. Good quality tubes are essential for the overall sound quality simply because they are a part of the circuit, the circuit can only sound as good as it’s parts will allow. Good circuit design is critical, the Dynaco circuit is genius. The 6GH8A, also no longer in production, appears to be in abundant supply and is very affordable. Like all tubes, some brands and build styles offer both sonic and reliability advantages over cheaper, inferior made tubes. This amp comes with 2 NOS RCA, GE or a Mullard variant (as per availability) 6GH8A tubes, tested and matched. Contact me if you want the 7199 version, I’ll make a special listing for you. Manuals, Instructions, pictorials, diagrams, schematics and supplemental documentation are all included on a CD-Rom. Tube installation instructions with a numbered easy to follow pictorial included. Bias will be pre-set but due to variations in AC wall voltages the bias should be checked and adjusted for your specific location. Each unit is custom, a hand built, made to order unit. Your unit will look identical but wire color and routing may be slightly different from unit to unit, these are hand built units. Straightforward simple business here. The manuals, instructions, pictorials, diagrams, schematics and supplemental documentation are all included on a CD-ROM. Issues from abuse, misuse, neglect or external damages are not covered. Damage from moisture of any kind, electrical surges, lightning and static electricity are not covered. Coverage is limited to replacement of any original components which have failed under normal operating conditions. Faulty components will be replaced with no charge to you. For parts or labor. The item “Dynaco Dynakit ST-70 Stereo Tube Amplifier, New, Not Vintage EL34 Push Pull Amp” is in sale since Sunday, November 15, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “had-fun-moved-on” and is located in Coweta, Oklahoma. This item can be shipped to United States.
  • Model: Dynakit Stereo 70 / ST-70
  • Modified Item: No
  • Country/Region of Manufacture: United States
  • Custom Bundle: Yes
  • Included Tubes: (2) 6GH8A – (4) EL34 / 6CA7 – (1) 5AR4 / GZ34
  • Type: Tube Amplifier
  • MPN: DYNAKIT Stereo 70 / ST-70
  • Brand: Dynaco
  • Bundle Description: fully assembled amplifier with cover and all new tubes

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Tuesday, November 3rd, 2020
Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp w/PAS Preamp & FM-3 Tuner Set. The item “Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set” is in sale since Friday, October 30, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “larch2″ and is located in Rochester, New Hampshire. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.
  • Brand: Dynaco
  • Type: Tube Amplifier, Preamp & Tuner
  • Model: ST-70, PAS, FM-3
  • Bundle Description: Stereo 70 Power amp, PAS Preamp & Tuner
  • Country/Region of Manufacture: United States
  • MPN: Does not apply

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Wednesday, October 28th, 2020
Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set

All three units power up, I was able to listen some FM stations, both preamp and tuner need internal/control cleaning and power amplifier tubes have some black spots on them, they are not tested further/professionally. Please read description and view pictures for details. Vtg Dynaco Dynakit Stereo 70 Tube Power Amp w/PAS Preamp & FM-3 Tuner Set. All three units power up, I was able to listen some FM stations, both channels are responsive, however both preamp and tuner need internal/control cleaning, this set is not tested further/professionally. Power amplifier has four Dynaco 6CA7 EL34 (three of them are marked Great Britain), one Dynaco 7199-USA, one Electron 7199-USA and another tube that does not have any markings on it. EL34 tubes have some black spots and’2′ written on their tops and some lettering/numbers are erased/washed up on some tubes. This set also includes four RCA type cables and panel mounts for tuner and PAS-2 units (I do not know if PAS-2 panel mount is compatible with PAS unit). Please view pictures for details and view my other listings for a pair of Altec 416A woofers and 806A drivers/H-811B horns listings. Get Supersized Images & Free Image Hosting. Create your brand with Auctiva’s. Attention Sellers – Get Templates Image Hosting, Scheduling at Auctiva. Track Page Views With. Auctiva’s FREE Counter. The item “Vtg Dynaco Dynakit Stereo 70 Tube Power Amp withPAS Preamp & FM-3 Tuner Set” is in sale since Monday, October 26, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “malak” and is located in Denver, Colorado. This item can be shipped worldwide.
  • Brand: Dynaco
  • Bundle Description: Stereo 70 Power amp, PAS Preamp & Tuner
  • Country/Region of Manufacture: United States
  • MPN: Does not apply
  • Model: ST-70, PAS, FM-3
  • Type: Tube Amplifier, Preamp & Tuner

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Wednesday, August 19th, 2020
Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works

Dynakit 70 Vintage Tube Amp… But photos show it works… The item “Dynakit 70 Vintage Tube Amp. Tested needs cleaned. But photos show it works” is in sale since Tuesday, August 18, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “304jlb” and is located in Dunbar, West Virginia. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.
  • Brand: Dynaco
  • Type: Tube Amplifier

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Tuesday, August 18th, 2020
Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage

Custom Build to Order. / Pre-Order COVERS ARE OUT OF STOCK UNTIL FURTHER NOTICE. Stereo 35 Dynakit Tube Amplifier / Dynaco ST-35 power. BRAND NEW DYNAKIT STEREO 35. COVERS ARE OUT OF STOCK UNTIL FURTHER NOTICE. The Stereo 35 is a classic and was always a very clean sounding amplifier, even earning itself the nickname The Poor Mans McIntosh. This is an all new Stereo 35 that has been specially built to exceed all of the original specifications, performance, and reliability, along with providing improved functionality. Now, here’s the question, do you really want an amplifier that sounds and looks 50 years old? Romantic, nostalgic, sure, practical? Keep in mind that an original condition 50 year old tube amp is going to sound 50 years old, not like it did new, 50 years ago. If that is really what you want, that’s fine, this one probably isn’t what you’re looking for. This amp is brand new, 100% new, and needs nothing, it sounds, works and looks far better than any Stereo 35 ever did 50 years ago. By using higher quality components with a few additional features this amplifier raises the bar. The original Stereo 35 did not use a power supply filter choke. It was proven that the noise floor of the amp could be lowered even further by its use so a Dynakit C-354 shielded choke was installed in place of the ceramic power resistor. This amp is absolutely dead quiet, no hiss, no hum, just crystal clear music is all you hear. The original design used a non adjustable cathode bias circuit. This amp now has user adjustable bias, all four output tubes can be individually biased using the innovative and proven Adjustable Fixed Bias Control Upgrade by Dynakit. The original Stereo 35′s did not have a power switch so a 6 amp toggle switch was added neatly on the back side of the chassis. An inrush current limiter (CL90) has been incorporated to regulate and soften the power on process, this feature helps protect the tubes and extends component life. This amplifier is entirely wired with silver plated, stranded, Teflon coated wire and every connection was made with Cardas Audio Quad Eutectic Silver Solder, a very high quality solder made with a proprietary blend of silver, copper, tin & lead. The original Stereo 35 amps have a cadmium plated metal chassis which has a rather dull shineless finish. This new chassis is heavy duty (non-magnetic) type 304 mirror finished stainless steel with durable black epoxy silkscreen lettering. The perforated cover is finished in Satin Black. Four 1/2 tall rubber feet were installed for better isolation and improved chassis ventilation. The upgraded power cord looks great, it has a black woven nylon covering the wire and has a factory molded on right angle offset plug. Each channel uses its own discrete amplifier board , these are Dynakit PC-13 boards, theyre made in the USA. These heavy duty boards faithfully reproduce the original and brilliant Dynaco Stereo 35 circuit, layout and color, they’re made to military specs using modern materials of the highest quality. The stereo separation this unique design provides is amazing. These circuit boards are populated with special high precision audio grade metal film resistors and excellent sounding high quality audio grade capacitors. The boards have upgraded QQQ and Cinch black tube sockets. The resistors are made by PRP rated at 1% tolerance and specifically designed for high end audio applications, these ensure the signal circuit is quiet and accurate. The capacitor selection consists of (6) Cornell Dubilier Silver Mica, (2) Illinois Capacitor. Original capacitance (uf/mfd) values were kept as recommended to avoid creating low-frequency instability. The K42Y-2 paper in oil caps really smooth things out nicely, giving this amp that wonderful creamy smooth yet detailed sound. These 4 caps were also hand matched to within. 1% of each other. The screening tolerances were tightened for improved sonics and voltage ratings were increased for higher reliability. The tighter screening tolerances of the resistors and these excellent capacitors help give this amp its great ability to reproduce complex musical passages in superb detail while keeping all the magic and smooth musical warmth you want. This approach would not lend itself to guitar amplification but works wonders in a HiFi application. Great sound comes from great circuit design, not magic parts. Having high quality parts in a great circuit simply enhances the already good design. This amp obviously holds great advantage over a new unmodified or original condition ST-35. The warmth, depth and detailed sonic range of this amps soundstage are incredible. There are a factory fresh pair of superb sounding ECC832 / 7247 preamp tubes by JJ Electronic that were gain matched using an Amplitrex digital tube tester. In the Dual Triode 7247 tube, section 1 of the tube is the high gain 12AX7 (gain factor=100) and section 2 is the low gain 12AU7 (gain factor=20). This is an asymmetrical tube so it will not be “balanced” when tested due to the two different tube types combined together in a single tube. Again, each 7247 tube contains two dissimilar triodes. This tube is especially suited for applications requiring a high voltage amplifier and a cathodyne type phase inverter like with the ST-35 amplifier. The dual triode circuit is just one of the many secret weapons this amp uses to generate such exceptional sound. This amp has four brand new Tung Sol 6BQ5 / EL84 output tubes, platinum matched by plate current using an Amplitrex digital tube tester. The Bias Balance Bias Control: Output is kept in check by the the Dynakit Fixed Bias Control Unit. This is an upgraded feature and is not found on the original or new stock Stereo 35 amplifiers. The ST-35 Bias Control Unit (BCU) is a fantastic power circuit modification from Dynakit which permits adjustment and control of the bias setting for each of the 4 (EL84/6BQ5) output tubes via (4) separate on board precision adjustment pots. The BCU circuit board has Vishay, Xicon and NTE precision metal film resistors, high quality Nichicon capacitors and Vishay brand trimmers. The BCU board is constructed from type III, 240 degree C rated Brown Polyimide material with (PTH) plated thru-holes and double sided solder mask. It was carefully designed to fit in nicely and also match the amplifier boards in appearance. This is a well engineered and desirable upgrade that greatly extends tube and transformer life while also creating a stable balanced output and overall more efficient operation throughout the amplifier. This tightly balanced and controlled output ensures circuit stability which in turn improves sound quality. The BCU also allows for the use of unmatched output tubes to be used as those can now be individually biased for a balanced draw and output by adjusting the BCU. This Stereo 35 amplifier uses solid state diode rectification as did the original design. The correct 60/40/20/100 multi section power supply filter capacitor is also new from Dynakit and quality made in the USA. The heart and soul of any tube amplifier are its transformers. The new PA-774 power transformer and matching Z-565 output transformers are exceptional quality Dynakit transformers that meet or exceed the quality and performance of the originals and they’re made in the USA. The Z-565 output transformers use M-6 grain oriented laminations and they are interleaved wound just like the originals. With these new Z-565 transformers, this ST-35 will accommodate a pair of either 4 or 8 ohm speakers making it much more compatible for use with modern speakers than the 8 and 16 ohm design of the original Z565 transformers. The new PA-774 power transformer is wound for today’s real world 120v + line voltage as opposed to the originals which were wound for the 112-117v of the early 1960′s. A huge and convenient improvement which allows this amp to operate directly from a standard wall outlet without the need of a voltage reducing device. Another big improvement is the fact that the PA-774 incorporates Class “B” insulation & wiring which is better designed to handle significantly higher operating temperatures. Based on findings from a tear down and close inspection of some number of original production Dynaco PA-774 power transformers, it was concluded that all of these old units were of a Class A design with a maximum operating temperature of only 221 degrees Fahrenheit. The new production PA-774 units are designated as “B” classification, a NEMA Class 150 C design having a maximum operating temperature of 302 degrees Fahrenheit. The bottom line is the new production Dynakit power transformers are designed to handle measurably higher operating temperatures than the original Dynaco power transformers resulting in near zero failures, extended service life and enhanced durability. The power transformer is mounted on rubber isolation bushings. So what about all the fuss made over those magic cloth lead transformers? The truth here is theres no magic in those cloth lead wires whatsoever. Those old cloth covered leads indicate early manufacture (pre-1970) and many of those old transformers are in fact better quality than their new production counterparts and replacements. This is certainly NOT the case with the new Dynakit transformers which incorporate the latest design advancements in metals, insulation, resins and construction. The results of this well executed transformer design and painstaking production effort are quieter and cooler operating transformers which effortlessly provide increased performance over the originals. This is an amp for even the discriminating audiophile. Here’s what the renowned tube amp guru Bob Latino had to say a while back about the Stereo 35: Many feel, and I concur, that this little amp, within its power range, is probably the best sounding all stock power amp that Dynaco ever put out. Only 17.5 watts per channel but, even unmodified, a very clean sounding 17.5 watts. EL84 output tubes, an all triode driver system and a solid state rectifier gave this little amp excellent frequency extension and very low distortion figures. My thoughts are that if Bob Latino says that, and many others agree with him, that you will be convinced as well. This legendary little amp goes beyond its call of duty, it is truly a listening pleasure and it is built to last. So if you have been looking at Dynaco 35s you can easily see the difference in those offerings and this one. Consider the cost and work involved to bring an original condition amp up to reliable, safe and excellent sounding condition. Again I pose the question: Do you really want an amplifier that sounds and looks 50 years old? Keep in mind, an original condition 50 year old amp is going to sound 50 years old, not like it did new, 50 years ago. If you’re undecided here are a few more points to consider regarding Dynaco/Dynakit. Affordable and readily available parts. A great variety of upgrades. The ongoing and active online community of Dynaco enthusiasts. Ease of repair and service if needed. Dynaco and Dynakit products hold a special place in the HiFi Audio industry regarding these important aspects and in fact, are. Unrivaled by any other brand for support, parts availability and serviceability. You can own, enjoy and use this amp with confidence. A numbered pictorial for quick easy tube installation is included, all you’ll need is a screwdriver for removing the cover. Includes the printed Dynakit Stereo 35 assembly and operating manual stamped with the serial number that belongs specifically with this unit along with other supplemental documentation referencing the wiring, transformers, circuit boards, parts, bias instructions etc. Im always happy to answer any questions you may have. 1963 statement from the Dyna Company. The Dynakit Stereo 35 is a dual power amplifier of deceptively simple appearance and circuitry. Behind its seemingly conventional design is an extremely sophisticated circuit configuration representing the most recent advances in power amplifier engineering and construction. This high degree of technical refinement, combined with the conservative use of premium-grade components, has resulted in a typical Dynakit design offering superb performance at low cost. Each of the two channels in the Stereo 35 is rated as a 17.5 watt amplifier. As a result, the Stereo 35 can, if necessary, duplicate the sound intensity of amplifiers with much higher power ratings when called upon to do so. The heart of the Stereo 35 is the special Dynaco Z-565 output transformer, a patented design tailored specifically to this circuit. The transformer is free of resonances, has extended frequency response (from 6 to over 60,000 cycles), and is wound by special techniques on a carefully designed core to insure low distortion over a wide frequency spectrum. Each unit is custom, a hand built, made to order unit. Your unit will look identical but wire color and routing may be slightly different from unit to unit, these are hand built units. Turnaround time is 3 weeks or less. Photos and progress notes direct from me. Straightforward simple business here. Issues from abuse, misuse, neglect or external damages are not covered. Signs of tampering or repairs by anyone other than. Damage from moisture of any kind, electrical surges, lightning and static electricity are not covered. Coverage is limited to replacement. Of any original components which have failed under normal operating conditions. Faulty components will be replaced with no charge to you for parts or labor. Tubes are not covered. Properly Packed and Double Boxed / Always Insured. The item “Dynakit Stereo 35 Amp Dynaco ST-35 / 7247 Tube Power Amplifier New not Vintage” is in sale since Tuesday, August 11, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “funtastic-vintronics” and is located in Coweta, Oklahoma. This item can be shipped to United States.
  • Model: Dynakit
  • Country/Region of Manufacture: United States
  • Type: Power Amplifier
  • MPN: Stereo 35 / ST-35
  • Brand: Dynaco

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

Saturday, August 15th, 2020
New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES

Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier INCLUDES 7199 TUBES. For the purist – this amp uses the 7199 tubes & PC3 c. Ircuit board and includes a pair of RCA 7199 tubes. This Listing is for PRE ORDER ONLY – these are Custom Built. Enjoy the rich smooth tones of analog audio and even order harmonics that only vacuum tube amplification can produce. It reveals musical qualities with fantastic realism and depth you may have never imagined possible. The legendary original design up to date with highly improved levels of sound quality, looks and performance. Because of the ST-70′s naturally high impedance (470K) it is compatible with virtually any solid state or tube preamp. It is fairly safe to say that most people today would have no idea of how wonderful a Stereo 70 amplifier is capable of. Of these various states and varieties of operating conditions is a gamble. “Original condition” amps or those “updated” or. Having any number of “modifications” from mild to wild can still leave a lot to be desired. “Restored” is more than popping. In a few capacitors and some tubes. Much more will need to be done to fully bring about that great sound the amp once had. Although they will play music, they are still incapable of reproducing the sound quality they possessed when new, 50 years ago. Unless they are fully restored. Resistors become noisy and drift out of tolerance due to age and heat. Circuit board and component. Materials begin to deteriorate causing signal degradation, solder joints and tube sockets can be loose, oxidized, worn and have. Poor quality connections causing signal interference and noise. Capacitors lose their range and clarity, their values having changed. Hiss, buzz, hum, pop and fuzziness are not normal or desirable qualities. Isn’t the great smooth sound of a time long. Gone by what you’re really after, those sweet tones produced only from tube amplification? Like a musical time machine, this. Amplifier will take you back to the beginning, like when these amps were new. But there’s even more to consider here. All of the components used in this amplifier have greatly improved characteristics over the ones available and used 50 years ago. That makes the sound quality of this amp even better than one would have been then, as a new one 50 years ago. Take a good close look at this one. Don’t cheat yourself out of what you’re really wanting; superb sound, high build quality, safe and reliable operation, great looks. And that comforting pride of ownership. You simply won’t believe that you are listening to a Dynakit, but you’ll sure be glad that you are. Mundorf MCap ZN Capacitors – German made – 600v – 5% – Values are. 1uf – Improved Bass Response. PRP Audio Grade Resistors – High Resolution – 500v Rated – 1% Accuracy – Ultra Low Noise. Bias Circuit Has Upgraded German Made 100uf F&T Capacitors with Flameproof Metal Oxide Resistors. Dynakit PA-060 Power Transformer (120v Windings) – Notice its Size, the Increased Lamination Stack! Dynakit A-470 Output Transformers – (4,8,16 Ohm Taps) – Grain Oriented Laminations – Interleave Wound. Dynakit C-354 Shielded Power Supply Filter Choke – (1.75 Henries, 62 Ohms, 10%) – No More Nasty Leaks. 9 Brand New High Quality Tube Sockets in Black / 600v & 1000v Alpha Wiring Used Throughout the Entire Amp. Genuine Dynakit Multi Section Filter Capacitor – Factory Correct Values 80/40/30/20uf – 525v Rated. New Dynakit Stainless Steel Mirror Finish Chassis (Non-Magnetic) – Beautiful Museum Quality Look. Brand New Dynakit Perforated Steel Cover / Cage – Factory Painted in Black or Original Brown w/ matching badge. Dynakit PC-3 “A” Circuit Board – Made Specifically for 7199 Driver Tubes. Includes (2) tested and matched Vintage 7199 by RCA (brand subject to availability). Includes (4) New EL34 / 6CA7 NessTone Output Tubes – Plate Current Matched – Amazing Sound. Includes (1) New 5AR4 / GZ34 Rectifier Tube – Groove Tubes Label – Soft Start – Highest Current Capability. Power Supply Diode Rectification – No Scary Old Outdated Selenium Rectifier Here! Flashback Prevention Safety Diodes Installed at the Rectifier Tube. Additional shielding on under chassis components to reduce EMI / interference. Careful wire routing and extra clamps to reduce movement & electromagnetic signal interference (EMI). Assembled With Alpha 60/40 rosin core solder – for the Very Best Quality Connections. Power Transformer Isolation Bushings Installed – Prevents the Transfer of Mechanical Hum to the Chassis. Custom Silver RCA Input Jacks – Vintage Correct Look – Wider Spacing for Larger Modern Input Cables. Original Screw Style Speaker Output Terminals – Vintage Correct – Full Function (4,8,16 Ohm + Common/Ground). Includes (4) Speaker Wire Spade Terminal Adapters AND (2) Right Angle RCA Input Connectors. Retro Style Cloth Covered 16 Gauge Power Cord – 2 Prong Non-grounded Non-polarized Plug. Heavy Duty Rubber Feet with Steel Bushings – (Height). 437″ / (Diameter) : 1.062″ Tapering Down to 1.00. Assembled with Great Attention to Detail Using High Quality Parts – 48 hr Minimum Burn in Tested – Sounds Incredible. Operates From a Standard Wall Outlet – No Voltage Reducer (Variac) Needed – Built for Today’s 120v+ Voltages. Arrives With Bias Preset – Just Install the Tubes – Simple To Do – Instructions are Included. Front Preamp Sockets are Wired for Bias Set Only – Reduces Audio Signal Interference. Vintage Vibe – Modern Reliability – The Beautiful Sound of Tubes – Priceless Pleasure. So how does it sound? – Magical – very musical with a highly detailed voice and plenty of solid, clean wonderful bass. This amp is absolutely dead quiet – no hum, no buzz, no hiss, no snap-crackle-pop! It sounds like it is supposed to. If you’re in search of that golden age of audio sound with stunning vintage looks, you’ve just found it. This is your bad boy. This is a 100% brand new amp, a very high quality build, total listening satisfaction. This ST-70 delivers dramatically improved. Sonics as the result of being carefully and thoughtfully built, all new, from the ground up, with technologically advanced. Components and high-end parts. I build these amps like I was going to keep them myself, forever. This is a complete, ready to go amplifier. You will LOVE this amp. If you’re waiting for a nicer one to come along, pull up a really comfortable chair, you’ll be here a while. I have selected the Groove Tubes 5AR4/GZ34 as the rectifier tube in my Dynaco 70′s for more than a year now. It has the highest current capability. And has been 100% reliable, it also looks right in the amp. I believe it to be the best current production rectifier tube of its type on today’s market. Same story for the NessTone EL34/6CA7 tubes, they’re all I use now. These are very close in build to the legendary SED “Winged C” tubes of years ago. These output tubes are hand selected and tested here in the USA and then identically matched as a quad (4 tubes) by their plate current test. Results using the ROE computerized testing system. I have had nothing but satisfied buyers and zero failures, they sound amazing. Sound, build quality and their vintage looks. This amp comes with 2 NOS RCA 7199 tubes. About the 7199 tubes. The 7199 vacuum tube combines both a pentode and triode in a single glass envelope. This is the tube used on the standard stock circuit board. Of the Dynaco 70. Each of the tubes two sections has a separate cathode and is electrically independent. In the Dynaco 70 the pentode is used for. The input stage, and the triode as a phase inverter. American 7199 production ended entirely sometime in the 1980s while the Soviet made Sovtek 7199. Was produced until about 2007. As a result the tube is becoming increasingly scarce and rather expensive. Finding good quality, properly functioning. Matched pairs is growing even more difficult as supplies run shorter at an increasing rate driving prices even higher by way of supply and demand. Good quality 7199′s in a healthy Dynaco 70 circuit sound very nice. If there were any more important part of a tube amplifier we’d talk about that here, we saved the best for last. The transformers are the heart. And soul of the tube amp, period. Dynaco wasn’t messing around when they designed and built their originals. These new Dynakit transformers were. Reverse engineered from the original Dynaco designs. Like the originals, these have grain oriented laminations and interleaved windings. Made current production genuine. Dynakit transformers that meet and exceed every aspect of the originals. If there were some sort of “magic” in the use. Of cloth leads, Dynakit. Would have used them again here, you can bet that. But, there’s is no magic in cloth covered lead wire, period. In an apples to apples. Showdown, these are better than those. Modern advancements in materials, methods and technologies used in the production of these. Resulted in transformers that operate quieter and cooler than the originals while providing less distortion, more power. These transformers are in one word, exceptional. Manuals, Instructions, pictorials, diagrams, schematics and supplemental documentation are all included on paper and a CD. Tube installation instructions with a numbered easy to follow pictorial included. Bias will be pre-set but due to variations in AC wall voltages the bias should be checked and adjusted for your location. Each unit is custom, a hand built, made to order unit. Your unit will look identical but wire color and routing may be slightly different. From unit to unit, these are hand built units. Turnaround time is 3 weeks or less. Will be kept informed in a communication loop with messages and updates, photos and progress notes direct from me. Straightforward simple business here. Issues from abuse, misuse, neglect. Or external damages are not covered. Damage from moisture of any kind, electrical surges, lightning and static electricity are not covered. Coverage is limited to replacement. Of any original components which have failed under normal operating conditions. Faulty components will be replaced with no charge to you. For parts or labor. The item “New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier / 7199 TUBES” is in sale since Friday, August 7, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “funtastic-vintronics” and is located in Coweta, Oklahoma. This item can be shipped to United States.
  • Model: ST-70 / Stereo 70
  • Country/Region of Manufacture: United States
  • Type: Tube Amplifier
  • MPN: ST-70 / Stereo 70 Tube Amplifier
  • Brand: Dynaco

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

Tuesday, August 11th, 2020
New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes

NEW Dynaco 70 / Dynakit Stereo 70 – 6GH8A TUBE VERSION. This Listing is for PRE ORDER ONLY – these are Custom Built to order for you – Turnaround time is 3 weeks or less. Enjoy the rich smooth tones of analog audio and even order harmonics that only vacuum tube amplification can produce. It reveals musical qualities with fantastic realism and depth you may have never imagined possible. The legendary original design up to date with highly improved levels of sound quality, looks and performance. Because of the ST-70′s naturally high impedance (470K) it is compatible with virtually any solid state or tube preamp. It is fairly safe to say that most people today would have no idea of how wonderful a Stereo 70 amplifier is capable of. Of these various states and varieties of operating conditions is a gamble. “Original condition” amps or those “updated” or. Having any number of “modifications” from mild to wild can still leave a lot to be desired. “Restored” is more than popping. In a few capacitors and some tubes. Much more will need to be done to fully bring about that great sound the amp once had. Although they will play music, they are still incapable of reproducing the sound quality they possessed when new, 50 years ago. Unless they are fully restored. Resistors become noisy and drift out of tolerance due to age and heat. Circuit board and component. Materials begin to deteriorate causing signal degradation, solder joints and tube sockets can be loose, oxidized, worn and have. Poor quality connections causing signal interference and noise. Capacitors lose their range and clarity, their values having changed. Hiss, buzz, hum, pop and fuzziness are not normal or desirable qualities. Isn’t the great smooth sound of a time long. Gone by what you’re really after, those sweet tones produced only from tube amplification? Like a musical time machine, this. Amplifier will take you back to the beginning, like when these amps were new. But there’s even more to consider here. All of the components used in this amplifier have greatly improved characteristics over the ones available and used 50 years ago. That makes the sound quality of this amp even better than one would have been then, as a new one 50 years ago. Take a good close look at this one. Don’t cheat yourself out of what you’re really wanting; superb sound, high build quality, safe and reliable operation, great looks. And that comforting pride of ownership. You simply won’t believe that you are listening to a Dynakit, but you’ll sure be glad that you are. Mundorf MCap ZN Capacitors – 600v – 5% – Values are increased to. 1uf for Improved Bass Response. PRP Audio Grade Resistors – High Resolution – 500v Rated – 1% Accuracy – Ultra Low Noise. Genuine Dynakit PC-3 “B” Circuit Board – Made Specifically for 6GH8A Driver Tubes – No tube Adapters here. Includes (2) tightly test matched Vintage NOS 6GH8A by RCA, GE or Mullard (as per availability). Includes (4) New EL34 / 6CA7 NessTone Output Tubes – Plate Current Matched – Amazing Sound. Includes (1) New 5AR4 / GZ34 Rectifier Tube – Groove Tubes Label – Soft Start – Highest Current Capability. Bias Circuit Has Upgraded German Made 100uf F&T Capacitors with Flameproof Metal Oxide Resistors. Dynakit PA-060 Power Transformer (120v Windings) – Notice its Size, the Increased Lamination Stack! Dynakit A-470 Output Transformers – (4,8,16 Ohm Taps) – Grain Oriented Laminations – Interleave Wound. Dynakit C-354 Shielded Power Supply Filter Choke – (1.75 Henries, 62 Ohms, 10%) – No More Nasty Leaks. 9 Brand New High Quality Tube Sockets in Black / 600v & 1000v Alpha Wiring Used Throughout the Entire Amp. Genuine Dynakit Multi Section Filter Capacitor – Factory Correct Values 80/40/30/20uf – 525v Rated. New Dynakit Stainless Steel Mirror Finish Chassis (Non-Magnetic) – Beautiful Museum Quality Look. Brand New Dynakit Perforated Steel Cover / Cage – Factory Painted in Black or Original Brown w/ matching badge. Power Supply has Diode Rectification – No Scary Old Outdated Selenium Rectifier Here! Flashback Prevention Safety Diodes Installed at the Rectifier Tube. Additional shielding on under chassis components to reduce EMI / interference. Careful wire routing and extra clamps to reduce movement & electromagnetic signal interference (EMI). Assembled With Alpha 60/40 rosin core solder – for the Very Best Quality Connections. Power Transformer Isolation Bushings Installed – Prevents the Transfer of Mechanical Hum to the Chassis. Custom Silver RCA Input Jacks – Vintage Correct Look – Wider Spacing for Larger Modern Input Cables. Original Screw Style Speaker Output Terminals – Vintage Correct – Full Function (4,8,16 Ohm + Common/Ground). Retro Style Cloth Covered 16 Gauge Power Cord – 2 Prong Non-grounded Non-polarized Plug. Heavy Duty Rubber Feet with Steel Bushings – (Height). 437″ / (Diameter) : 1.062″ Tapering Down to 1.00. Assembled with Great Attention to Detail Using High Quality Parts – 48 hr Minimum Burn in Tested – Sounds Incredible. Operates From a Standard Wall Outlet – No Voltage Reducer (Variac) Needed – Built for Today’s 120v+ Voltages. Arrives With Bias Preset – Just Install the Tubes – Simple To Do – Instructions are Included. Front Preamp Sockets are Wired for Bias Set Only – Reduces Audio Signal Interference. Vintage Vibe – Modern Reliability – The Beautiful Sound of Tubes – Priceless Pleasure. So how does it sound? – Magical – very musical with a highly detailed voice and plenty of solid, clean wonderful bass. This amp is absolutely dead quiet – no hum, no buzz, no hiss, no snap-crackle-pop! It sounds like it is supposed to. If you’re in search of that golden age of audio sound with stunning vintage looks, you’ve just found it. This is your bad boy. This is a 100% brand new amp, a very high quality build, total listening satisfaction. This ST-70 delivers dramatically improved. Sonics as the result of being carefully and thoughtfully built, all new, from the ground up, with technologically advanced. Components and high-end parts. The stock Dynaco circuit is used with only a couple of re-engineered elements on the PCB to. I build these amps like I was going to keep them myself, forever. This is a complete, ready to go amplifier. You will LOVE this amp. If you’re waiting for a nicer one to come along, pull up a really comfortable chair, you’ll be here a while. I have selected the Groove Tubes 5AR4/GZ34 as the rectifier tube in my Dynaco 70′s for more than a year now. It has the highest current capability. And has been 100% reliable, it also looks right in the amp. I believe it to be the best current production rectifier tube of its type on today’s market. Same story for the NessTone EL34/6CA7 tubes, they’re all I use now. These are very close in build to the legendary SED “Winged C” tubes of years ago. These output tubes are hand selected and tested here in the USA and then identically matched as a quad (4 tubes) by their plate current test. Results using the ROE computerized testing system. I have had nothing but satisfied buyers and zero failures, they sound amazing. Sound, build quality and their vintage looks. This amp comes with 2 NOS. RCA, GE or Mullard (as per availability). 6GH8A tubes, tested and matched. About the old original 7199 tubes. The 7199 vacuum tube combines both a pentode and triode in a single glass envelope. This is the tube used on the standard stock circuit board. Of the Dynaco 70. Each of the tubes two sections has a separate cathode and is electrically independent. In the Dynaco 70 the pentode is used for. The input stage, and the triode as a phase inverter. American 7199 production ended entirely sometime in the 1980s while the Soviet made Sovtek 7199. Was produced until about 2007. As a result the tube is becoming increasingly scarce and rather expensive. Finding good quality, properly functioning. Matched pairs is growing even more difficult as supplies run shorter at an increasing rate driving prices even higher by way of supply and demand. Good quality 7199′s in a healthy Dynaco 70 circuit do sound very nice. Enter the 6GH8A Tube. The 6GH8A like the 7199 tube is a vacuum tube combining both a pentode and triode in a single glass envelope. Each section has a separate cathode. And is electrically independent, the pentode is used for the input stage, and the triode as a phase inverter. Using the updated Dynakit PC-3 board made. For 6GH8A tubes, this tube can now be used with exceptional results. Amplifier makers like HH Scott, Harman Kardon and Eico, among others, have. Used the 6GH8A since back in the late 50′s. I find no audible difference in the 7199 and the 6GH8A so long as both tubes compared are of equal quality. Good quality tubes are essential for the overall sound quality simply because they are a part of the circuit, the circuit can only sound as good as it’s parts. Good circuit design is critical, the Dynaco circuit is genius. The 6GH8A, also no longer in production, appears to be in abundant supply and. Like all tubes, some brands and build styles offer both sonic and reliability advantages over cheaper, inferior made tubes. We saved the best for last. The transformers are the heart and soul of the tube amp, period. Dynaco wasn’t messing around when they designed and built. These new Dynakit transformers were. Reverse engineered from the original Dynaco designs. Like the originals, these have grain oriented laminations and interleaved windings. These are USA made current production genuine. Dynakit transformers that meet and exceed every aspect of the originals. If there were some sort of “magic” in the use of cloth leads, Dynakit. Would have used them again here, you can bet that. But, there’s is no magic in cloth covered lead wire, period. In an apples to apples. Showdown, these are better than those. Modern advancements in materials, methods and technologies used in the production of these. Transformers has resulted in transformers that operate quieter and cooler than the originals while providing less distortion, more power. These transformers are in one word, exceptional. Manuals, Instructions, pictorials, diagrams, schematics and supplemental documentation are all included on a CD-Rom. Tube installation instructions with a numbered easy to follow pictorial included. Bias will be pre-set but due to variations in AC wall voltages the bias should be checked and adjusted for your location. Each unit is custom, a hand built, made to order unit. Your unit will look identical but wire color and routing may be slightly different. From unit to unit, these are hand built units. Turnaround time is 3 weeks or less. (most of the time is awaiting parts arrival) Once. Will be kept informed with messages and updates, photos and progress notes direct from me. Straightforward simple business here. Issues from abuse, misuse, neglect. Or external damages are not covered. Damage from moisture of any kind, electrical surges, lightning and static electricity are not covered. Coverage is limited to replacement. Of any original components which have failed under normal operating conditions. Faulty components will be replaced with no charge to you. For parts or labor. The item “New not Vintage Amp / Dynaco ST-70 Stereo 70 Dynakit Tube Amplifier 6GH8A Tubes” is in sale since Saturday, August 1, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “funtastic-vintronics” and is located in Coweta, Oklahoma. This item can be shipped to United States.
  • Model: Dynakit Stereo 70 / ST-70
  • Modified Item: Yes
  • Country/Region of Manufacture: United States
  • Custom Bundle: Yes
  • Type: Tube Amplifier
  • MPN: DYNACO Stereo 70 / ST-70
  • Modification Description: multiple upgrades as listed below
  • Brand: Dynaco
  • Bundle Description: complete amplifier with tubes as described below

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Sunday, July 5th, 2020
Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps

Out of storage and now for sale a KiT. A Bundle of 2 – Dynaco Vintage Dynakit Stereos -70. Amplifiers are fully Tubed and extra 2 EL-34 & manuals also provided. These Vintage amplifiers must be turned on slowly after many years of storage. The item “Dynaco Vintage Dynakit Stereo -70 Vacuum tube amps” is in sale since Saturday, November 23, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “westonauction” and is located in Weston, Massachusetts. This item can’t be shipped, the buyer must pick up the item.
  • Brand: Dynaco

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Wednesday, July 1st, 2020
Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working

Packed and insured by the carrier for safe arrival. The item “Dynakit MK III Vintage Monoblock Amplifier Dynaco Mark 3 Tube Amp MK3 Working” is in sale since Sunday, May 24, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “behmjaydarren” and is located in Lincoln, Nebraska. This item can be shipped to United States.
  • Brand: Dynaco
  • Type: Tube Amplifier

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

Wednesday, April 29th, 2020
DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works

Vintage Dynakit Stereo ST-70 Tube Amplifier in good working condition; quiet with no hum. Pretty impressive for a 50-60-year-old amp; a testament I think to its design and parts used. Powered up slowly on a variac with speakers attached. Comes with all tubes shown which were tested to be fine and a cage. All original circuitry and should be checked out by a tech for everyday use. The specified 5AR4 rectifier has been substituted by a 5U4 which is approved in the original Dyna manual for temporary use but that was when the other components were new and robust, so that should be changed out soon as their characteristics are different. I wanted to offer a working unit so that is why Im including it. Also, due to age and storage, the chrome is pitted and a foot is missing. The EL34/6CA7 tubes are new, made in China. The other tubes are vintage. Classic good sounding Dynaco for your collection. These are automatically added to the final invoice and I’m not able to delete or adjust them. Also, recently Fed Ex and the other carriers have dramatically increased costs when factoring even a small amount of dimensional weight (size of the box). The item “DYNACO Dynakit Stereo 70 Tube AMPLIFIER Vintage EL34 6CA7 ST-70 Amp Works” is in sale since Tuesday, April 28, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “anomieguru” and is located in San Francisco, California. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Bangladesh, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Luxembourg, Monaco, Macao, Martinique, Nicaragua, Pakistan, Paraguay, Uruguay, Russian federation.