Vintage Tube Amp

VINTAGE FISHER 800-C TUBE STEREO INTEGRATED AMPLIFIER. Working – Fully Serviced (Read Below for Service Report). Excellent Condition – See Pictures. Disassemble unit and inspect ALL solder connections under magnification. Reflow connections as necessary. Remove all tubes, treat all tube socket connections with DeOxit D-100 preservative. Check all tube connections for tension / tightness. Clean all switches and controls with DeOxit preservative. Check all power supply capacitors for integrity and AC ripple.. Replace any that do not test perfect. Check bias voltage and bias supply filter capacitor. Modify power resistor value in bias circuit to compensate for new type rectifiers higher voltage. Output tube bias now exactly on spec. Replace original output tube coupling caps with Jupiter audiophile Polypropylene types. Wow what an improvement! Replace all original smaller electrolytic capacitors with newer Elna and Nichicon types. Select phase inverter and audio (ECC83) types for best performance. This concludes audio section restoration. Now to FM & Multiplex. Remove tuning condenser cover. Lubricare condenser mechanics and dial string mechanism. Clean tuning condenser axle ground wipers and treat with DeOxit D100. This is absolutely necessary for best FM performance. _Perform full Dual Sweep alignment of FM RF, IF, and discriminator alignment using Sound Technology 1000A generator. Replace original 1uf 350v electrolytic with Nichicon polypropylene type. Also modify multiplex triggering circuit for more positive multiplex switching. Fisher 500C’s are known to have multiplex switching issues. This one is working perfectly and has wonderful separation. Select ECC83′s for best FM stereo performance and sound. Install LED lamps to illuminate dial glass. Install new foam behind front panel for proper light diffusion. Complete cosmetic clean up of dial glass, (it’s perfect), front panel (gorgeous) knobs and cosmetics. Oil Walnut case (it’s a beauty, not mint, but very, very nice) clean case aluminum tube cover, also beautiful, no heat stains.. Full bench test followed by a protracted use and listening test. FM, multiplex, phono performance is wonderful. Tech Comments: I have been servicing all brands of audio units, tubed and solid state, as a vocation, not a hobby, for nearly 60 years. I can honestly say that I have worked on hundreds of these receivers. This one has to be one of the nicest in recent memory. It appears to have been little used also. So we decided to “pull out all the stops” in servicing it. Wonderful FM, multiplex working as nicely as you will find, audio performance to die for. This one is a total winner, the front. Panel is near mint (most would describe it AS mint) it’s really stunning. You just don’t find them like this… What a great example of vintage tube audio! Tuning range: FM, MW. Power output: 30 watts per channel into 8? Frequency response: 25Hz to 25kHz. Total harmonic distortion: 0.7%. Input sensitivity: 3.3mV (MM), 230mV (line). Signal to noise ratio: 80dB (line). Channel separation: 50dB (line). This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “lped-electronics” and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Australia, Japan, South Korea, Indonesia, South Africa, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Malaysia, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Republic of Croatia, Luxembourg.

• Brand: Fisher
• Type: Integrated Amplifier

McIntosh MC240 Vintage Tube Amplifier – Fully Maintained by Our Contractor. It has been maintained by our designated contractor. Characters are missing here and there. Indication based on the Secondhand Articles Dealer Act: Hokkaido Public Safety Commission No. Note only for products that are turned on. Products that do not turn on are not eligible? The power supply for this product is AC100V 50/60Hz. A transformer may be required in some countries. If it is different from A type, a converter is required. You in areas other than 100V. If you use the transformer I sell, you can use it in areas other than 100V. If you have any other questions, please contact me. It may not be possible in some areas. (10-15 days to US). (10-30days or more to Other countries). International Buyers – Please Note. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “jamazon77″ and is located in this country: JP. This item can be shipped worldwide.

• MPN: MC240
• Brand: McIntosh
• Model: MC240

McIntosh MC240 Vintage Tube Amplifier – Fully Inspected by Our Shop – From Japan. Note only for products that are turned on. Products that do not turn on are not eligible? The power supply for this product is AC100V 50/60Hz. A transformer may be required in some countries. If it is different from A type, a converter is required. You in areas other than 100V. If you use the transformer I sell, you can use it in areas other than 100V. If you have any other questions, please contact me. It may not be possible in some areas. (10-15 days to US). (10-30days or more to Other countries). International Buyers – Please Note. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “jamazon77″ and is located in this country: JP. This item can be shipped worldwide.

• MPN: MC240
• Brand: McIntosh
• Model: MC240

Vintage Heathkit AA-100 Stereo Tube AMP, AJ-32 Tuner, Power On Not Fully Tested! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “baysurplustechnology” and is located in this country: US. 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, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Republic of Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.

• Brand: Heathkit
• Type: Tube Amplifier
• Model: Heathkit AA-100, AJ-32
• Country/Region of Manufacture: United States

8 of the bulbs are Telefunken brand. This amp still looks very good and works very well. No big scratches or damage. Has been thoroughly tested by a vintage audio technician and everything is working well. All inputs produce clear, powerful, and evenly balanced sound. Tested with different speakers and did not hear any distortions. Thank you for viewing! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “lehungvintage” and is located in this country: US. This item can be shipped to United States.

• Brand: H.H. Scott
• Type: Tube Amplifier
• Model: 222C
• Country/Region of Manufacture: United States

This is a Stromberg-Carlson ASR 433 stereo integrated tube amplifier in good overall condition. Not a museum piece, and not a beater, but a good solid unit. It has no cover. Be aware of that. The photo showing a unit with cover is just to show you what it looks like with a cover. It has been power on tested and filaments light up. I connected load resistors to the outputs for transformer protection. Since I don’t have speakers at my shop to connect, that’s as far as I took the testing. Given its age even if it is fully functional right now, I strongly suggest that it needs capacitor replacement by now. The item “Vintage Stromberg Carlson Tube Stereo Amplifier ASR-443 as is not fully tested” is in sale since Wednesday, October 27, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “quantummechanic” and is located in Satellite Beach, Florida. This item can be shipped worldwide.

• Model: ASR-443
• Modified Item: No
• Country/Region of Manufacture: United States
• Custom Bundle: No
• Featured Refinements: Vintage Stereo Amplifier
• Tube: EL-84
• Type: Tube Amplifier
• MPN: Does Not Apply
• Brand: Stromberg Carlson

No mid-fi, no gimmicks, no junk. Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Project, and Sony ES, we have access to OEM parts, service, and support. Full blown restoration of this great vintage integrated. In rare near-mint condition with a great patina on the brass faceplate. Vintage tubes all around. Wonderfull collectible piece in rare condition, plus it also includes a custom cover. SkyFi Notes on the Restoration: This piece came to us having already underwent an extensive restoration. Here is a rough outline of what we picked up on during our testing and review process: Chassis painted black instead of the original stock raw metal. Chrome tube cages added. Full recap including a new CE multi-section can, axial electrolytics, a mix of film and PIO coupling caps, and select micas. 3-prong grounded power cord added. SEP, COM Switch removed from circuit. Phono grounding lug added. This was a top notch restoration in all respects. Tube Notes: The rectifier tubes are current production Electro-Harmonix. The output tubes are all vintage GE, save for one branded Zenith. T he 12AX7s are GE branded, and the 12AU7s are a mix of Sylvania & Philips. All tubes were tested on our modern and professional Amplitrex AT-1000 tube tesrter, and were also confirmed working properly in circuit. Four x ECC83/12AX7 Four x EL84/6BQ5 Two x EZ81. 14Wpc (11.5dBW) continuous into rated load. Frequency response (at 1W into 8 ohms). ±15dB at 50Hz and 10kHz. IM distortion (60Hz and 6kHz at 4:1). 2% at 14W, 0.05% at 5W. Sensitivity (input for 14W). Mag phono 4mV Tape head 2mV Mic 5mV Aux and tuners 500mV. 4, 8, 16, and 32 ohms. 15″ (385mm) W 4-3/4″ (120mm) H 10-1/2 (270mm) D. 24 lbs (10.9kg). EICO, Electronic Instrument Company, Long Island City, NY (1960). The SkyFi Testing Process for Tube Amplifiers: We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and tubes are inspected for signs of stress overheating or cracking. We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If it all looks clean we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier the remains powered on to “burn in” on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will also be tested. We also test all tubes for output gain and leakage on our calibrated B&K 747 tester against the original manufacturers specifications. If needed, the tubes will be replaced from our vast NOS (New Old Stock) vintage or modern inventory. Final testing involves pushing actual music thorough the amplifier. We’ve learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we’re very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice. We have too many items for sale and its nearly impossible to keep track of offers outside of the official system. We accept trade-ins of equal or lesser value under certain conditions. Please visit our website to submit your gear for full consideration. We will only consider high-end equipment from mainstream manufacturers such as McIntosh, Mark Levinson, Audio Research, Krell, etc. And will typically pass on displays, projectors, receivers, dated surround processors, and mid-fi equipment of any type. We will offer a fair value for your equipment, but keep in mind were running a business and will need to be able to resell the equipment at a profit after investing a great deal of time and resources in testing, certifying, repairing, cleaning, and packaging the incoming equipment. SELL US YOUR GEAR (Working or Broken). Simply visit our website to submit your gear for full consideration. We are currently operating from our shop inside our dedicated building in Glen Rock, NJ. We have several well-equipped and dedicated listening areas, plus a dedicated listening studio with tons of equipment of all makes and models. Were not a store, so please dont make an appointment if youre just curious as to how a speaker or piece of equipment sounds. In essence – no tire kickers please. This is super useful when purchasing large speakers or heavy amplifiers. Its also great for ensuring your new turntable is setup correctly in its final resting place. The item “Eico HF-81 Vintage Tube Integrated Amplifier Fully Restored 1960′s Magic” is in sale since Wednesday, July 21, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “skyfiaudio” and is located in Glen Rock, New Jersey. This item can be shipped to United States.

• Brand: Eico
• Type: Tube Amplifier
• MPN: HF-81
• Model: HF-81

Specs from the original manual. Power Output : 50 watts per channel continuous RMS from 20-20k cps; 100 watts monophonic operation. Frequency Response : 14-45k cps at +/- 1dB at 50 watts. 2-100k cps +/- 1dB at 1 watt. Harmonic Distortion : Less than 0.5% at 1000 cycles at 50 watts each channel; 0.75% from 20-10k at 50 watts each channel. IM Distortion : Less than 0.5% at 50 watts equivalent sine wave power, 60 and 7k cps; 4:1 ratio; less than 0.15% at 10 watts equivalent sine wave. Sensitivity : 1.0 volt RMS input fro 50 watt ouput. Hum and Noise : Better than 90db below 50watts/. Damping factor: 15 at 1 KC – 16ohms. Feedback : Over 50dB in six multiple loops. Output Impedance : 4, 8, and 16 ohms per channel. Controls : 4 bias controls; 2 AC balance controls; Meter selector switch; Power on/off switch. Tube complement: (Total of 10) 4 – 7027A, 2 – 6BR8A, 4 – 6CL6, plus 5 silicon diodes. Dimensions : 17″ wide x 12-1/2″ deep x 8-1/2 hgihg. Power Consumption : 350 watts at 117 volts, 50-60 cps AC. The KT-550 was legendary engineer Stu Hegeman’s last work for Lafayette before he moved to Harmon Kardon. The circuit of the KT-550 is the direct predecessor of the HK Citation II, and is extremely similar. I have had this example for about 1 1/2 years now. I found it in original and very dusty condition at a neighbor’s garage sale, gave it a very thorough cleaning, and performed a full electrical restoration with the parts and values recommended by Jim McShane. The only passive components that have not been replaced are six of the wire wound resistors that measured in spec. The power supply now uses 1000 PIV fast/low noise UF5408 diodes for rectification and higher value capacitors from JJ, F&T, and Nichicon. Film capacitors are Solen PPE, Russain paper-in-oil K40Y-P, Cornell Dubillier “orange drops”, and Panasonic. Small-value caps are Cornell Dubillier silver mica. Resistors are all very high quality units from of Precisions Resistive Products, Vishay-Dale, Mills, KOA Speer, Allen Bradley, etc. 221 screen stopper resistors were also added on the power tubes. A full parts list is available on request. The 6CL6s and 6BR8As are the strong-testing vintage units that were in the amp when I got it. The 7027As are reissue Tung Sols with approximately 100 hrs on them. Input jacks have been replaced with modern gold-plated jacks, and a three-prong power cord was installed in place of the original non-polarized cord, with earth ground tied to the chassis for safety. The bias meter works perfectly, meaning that setting it to the indicated mark does in fact result in the correct current through the power tubes. The AC balance setting does not work. However this is moot since the original method of measurement didn’t reliably have better results than just setting the pots in the center. The AC balance has been set for the current tubes, however, by matching the signals at the power tube grids of each section as closely as possible with a dual channel oscilloscope. Actual power output at the onset of clipping is around 40wpc. I can provide 1kH and 10kHZ square wave samples as well if that tickles your fancy. The paint on the transformers and chassis has its share of scrapes and scratches, as seen in the photos, but it’s still a very handsome piece with a nice patina. Internally, some of the potting material from the power transformer has liquified and oozed down through the hole in the chassis. This doesn’t affect anything, but in case you’re curious what the black blob above the choke in the 5th photo is, there’s your answer. The amp will come with a copy of the original assembly and operating manual as well as all of the original components that were replaced. The amplifier works as expected, and sounds incredible. It’s been a labor of love and I’ve enjoyed it thoroughly, but I’ve found I prefer the sound of other topologies, so I’ve decided it’s time to pass this along to someone who will use it. Please let me know if you have any questions or would like additional pictures of anything. The item “Lafayette KT-550 Vintage Tube 50WPC Power Amplifier Fully Restored” is in sale since Saturday, August 28, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “aaron.talcott” and is located in Livingston, Montana. This item can be shipped worldwide.

• Brand: Lafayette
• Type: Power Amplifier
• Model: KT-550

This is a Stromberg-Carlson ASR 433 stereo integrated tube amplifier in good overall condition. Not a museum piece, and not a beater, but a good solid unit. It has been power on tested and filaments light up. I connected load resistors to the outputs for transformer protection. Since I don’t have speakers at my shop to connect, that’s as far as I took the testing. Given its age even if it is fully functional right now, I strongly suggest that it needs capacitor replacement by now. I actually have TWO of these exact model units available. The second will be listed at a later time. And does not have its top cover. The item “Vintage Stromberg Carlson Tube Stereo Amplifier ASR-443 as is not fully tested” is in sale since Tuesday, September 21, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “quantummechanic” and is located in Satellite Beach, Florida. This item can be shipped worldwide.

• Model: ASR-443
• Modified Item: No
• Country/Region of Manufacture: United States
• Custom Bundle: No
• Featured Refinements: Vintage Stereo Amplifier
• Tube: EL-84
• Type: Tube Amplifier
• MPN: Does Not Apply
• Brand: Stromberg Carlson

No mid-fi, no gimmicks, no junk. Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Project, and Sony ES, we have access to OEM parts, service, and support. We’re pleased to offer this Super Rare 220V version of this American legend. Even rarer to find one in this chrome is simply gorgeous, and the paintwork is superb. Plus this vintage tube amplifier received a complete internal restoration, bringing it to better than factory specs and reliability, while delivering the original sound signature that McIntosh intended. We achieve this delicate balance by upgrading components that don’t affect the sound quality, while keeping the ones that do. If you live overseas and have wanted a McIntosh tube amp, this is the only way to avoid using an external voltage converter which tends to be a huge compromise. Plus this MC240 is fitted with a complete set of vintage tubes to boot! Configurable for 240V or 120V operation upon request. Includes a very high quality custom embroidered dust cover. Fully Restored: Power Supply was completely rebuilt with modern components. Select Resistors replaced on tag boards. All original red line Sprague difilm caps left in place, all high voltage Bumblebee caps replaced with Paper in Oil caps. Original Bumblebee input caps left in place. Because this unit has a 120/240 transformer, the 125V/117V AC Voltage selector switch was repurposed to act as a power On/Off switch. Telefunken 12AX7 Smooth Plate (V1 – The critical first tube shared between L/R Channels is perfectly balanced). Philips NOS JAN 5814 (Military Spec 12AU7 Sub). 6L6 – Current Production Tung Sol Reissue 6L6GC. The SkyFi Testing Process for Tube Amplifiers: We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and tubes are inspected for signs of stress overheating or cracking. We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If it all looks clean we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier the remains powered on to “burn in” on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will also be tested. We also test all tubes for output gain and leakage on our modern professional. Tester against the original manufacturers specifications. If needed, the tubes will be replaced from our vast NOS (New Old Stock) vintage or modern inventory. Final testing involves pushing actual music thorough the amplifier. We’ve learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we’re very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice. If we dont have the original manufactures packaging, we use heavy duty double-ply corrugated boxes with custom made to your item Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging! We also use high quality fiber reinforced tape to seal our packages. We have too many items for sale and its nearly impossible to keep track of offers outside of the official system. We accept trade-ins of equal or lesser value under certain conditions. Please visit our website to submit your gear for full consideration. We will only consider high-end equipment from mainstream manufacturers such as McIntosh, Mark Levinson, Audio Research, Krell, etc. And will typically pass on displays, projectors, receivers, dated surround processors, and mid-fi equipment of any type. We will offer a fair value for your equipment, but keep in mind were running a business and will need to be able to resell the equipment at a profit after investing a great deal of time and resources in testing, certifying, repairing, cleaning, and packaging the incoming equipment. SELL US YOUR GEAR (Working or Broken). Simply visit our website to submit your gear for full consideration. We are currently operating from our shop inside our dedicated building in Glen Rock, NJ. We have several well-equipped and dedicated listening areas, plus a dedicated listening studio with tons of equipment of all makes and models. Were not a store, so please dont make an appointment if youre just curious as to how a speaker or piece of equipment sounds. In essence – no tire kickers please. This is super useful when purchasing large speakers or heavy amplifiers. Its also great for ensuring your new turntable is setup correctly in its final resting place. The item “McIntosh MC240 Vintage Tube Amplifier 220V Euro Transformer- Fully Restored” is in sale since Thursday, March 18, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “skyfiaudio” and is located in Glen Rock, New Jersey. This item can be shipped to United States.

• Brand: McIntosh
• Type: Tube Amplifier
• Model: MC240
• MPN: MC240