Vintage Tube Amp

RCA Tube Monaural Power Amplifier in good working condition. I’m not sure of the model as the paper tag is incomplete. I hooked a speaker to it and plugged my electric guitar in on the mic side and it worked perfectly. I have no way to test the phono input but I assume it also works. I’m not an expert but I would say the condition is very good. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “northbay22″ 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, Korea, South, Indonesia, Taiwan, South Africa, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Malaysia, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-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, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.

This rare Conrad-Johnson MV-125 All-Tube Amplifier is still in Near Excellent condition. The unit was very lightly used before storage in its original box, until now. The bottom right corner of the front has a small chip. The front has some light wear/stain due to age. Still looks very good overall. Has been thoroughly tested by a vintage audio technician and everything is working well. Sound is clear, powerful, and evenly balanced. 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: Conrad Johnson
• Type: Tube Amplifier
• Model: MV-125
• Country/Region of Manufacture: United States

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. The ARC 76A is a favorite among vintage audio collectors and tube rollers. This one is in what we call “survivor” condition, original and unmolested. We fitted a new set of tubes and did a light service to get it working nicely. Cosmetic condition is good with only a few visible signs of use, please look over our photos for more info. SkyFi Service Notes: This unit appeared to be all original on initial inspection. After testing all of the tubes it became clear that the output tubes needed replacement. We swapped out all of the 6550′s and biased them up to service manual spec. The input attenuators and jacks were also cleaned. After service, this amplifier tested clean above up to its rated 75W with ease. SkyFi Cosmetic Notes. The terminal strips exhibit the typical cracked barrier guards that we normally see on units of this age. Using period correct small spade connectors or spade to banana adapters is encouraged. Light marking under left handle of face plate. Light black paint marks on face plate. All 6CG7s are vintage GE, all testing well on our Modern and Professional Amplitrex AT1000 Tube Tester. 12AX7′s are a mix of GE and RCA, also tested well on our Amplitrex. The original GE 6550′s were at the end of their lifespan and were replaced with two matched sets of known good Svetlana Gold Label 6550 from our stock. All tubes biased to service manual spec. The 6550 in the power supply section was also replaced with a Svetlana tube. More from Audio Research. POWER OUTPUT 75 Watts per channel minimum RMS (both channels operating) into a 4, 8 or 16 ohm load from 20 Hz to 15 kHz with less than 1% total harmonic distortion. 1.5 volts for rated output. 80K ohms at 20 Hz; 30K ohms at 15 kHz. 4, 8, 16 ohms. 14 at 8 ohms (1 kHz). Intermodulation distortion: less than. 5% at rated power. More than 80 dB below rated output. 100, 120, 200, 220, 240 VAC; 50-60 Hz, 550 watts at rated power output. (4)12AX7, (8) 6FQ7, (2 matched pairs) 6550, (1) 6550. 19″ W x 7″ H x 12-1/4 D. 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 it’s 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 we’re 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. We’re not a store, so please don’t make an appointment if you’re 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. It’s also great for ensuring your new turntable is setup correctly in its final resting place. 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 this country: US. This item can be shipped to United States, Canada.

• Brand: Audio Research
• Type: Tube Amplifier
• Model: D-76A
• MPN: D-76A

Both units are still in decent physical condition. There are some marks and scratches, but no dents or damage. All tubes are intact and working well. Both amps have been thoroughly tested by a vintage audio technician, and there were no issues. Listened for hours and it was loud and clear. 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: Fisher
• Type: Tube Amplifier
• Model: 100
• Country/Region of Manufacture: United States

This Dynakit Stereo 70 still looks very beautiful inside and out. No dents or damage, just some wear due to age. Our tube tech has tested all functions and did not find any issues. Sound is clear, powerful, and evenly balanced. All tubes light up and work properly. Sorry we do not know its service history. Open to offers, but please stay close to the price. 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: Dynaco
• Type: Tube Amplifier
• Modification Description: See Listing Details:
• Model: Dynakit Stereo 70
• Country/Region of Manufacture: United States

The tubes are 6 Telefunken and 4 Dumont 7591. This unit still looks very good all around. Only has scratches/stains on the outer rim of the front. No dents or damage. All tubes are intact and working. All functions have been tested by our tech and everything works very well. Sound is clear, powerful, and evenly balanced. We tested all buttons, listened for hours, and did not detect anything abnormal. Please be advised that we did not do any servicing and do not know the service history. We only had testing done by a professional, and attest that all functions are working properly. 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: Sherwood
• Type: Vaccum Tube Amplifier
• Model: Sherwood S5000 II
• Country/Region of Manufacture: United States

The Dynaco Stereo 410 is a two channel power amplifier employing all silicon semiconductors. They include 38 transistors, 2 zener diodes, 24 diodes, and 3 thermal sensors. The output circuitry is of the full complementary symmetry design. The entire amplifier, except for an input network, is direct coupled. It’s measured distortion levels approach the threshold of much laboratory test equipment, not only at the commonly specified full power ratings, but more importantly at very low power outputs as well. This is the result of circuit techniques which eliminate any discernible crossover notch at low levels, and contributes to the Stereo 410′s freedom from listening fatigue. It’s accurate, uncoloured sonics have been achieved on a wide variety of loudspeaker loads, including electrostatics and multiple drivers with complex crossovers. The design of a superb power amplifier implies the necessity of several protection techniques for the amplifier, and for the speaker load. In addition to the AC line fuse, four separate B+ fuses are supplied. Electronic volt-amp limiting ensure safe operation of the output transistors, and an independent thermal cut-out for each output stage protects from high temperature. A large radiating area for the heat fins, which are attached to an aluminium back panel, and cooled with a thermostatically operated two speed fan, form a highly efficient heat sink. Speaker fuses protect the load. The Stereo 410 has been designed as two independent 200 watts (into 8 ohms) amplifying channels with a common power supply having a high degree of inherent regulation. In addition, where higher power is required, an extra cost circuit board assembly will be made available to permit monophonic (bridge) operation for 8 and 16 ohm loads. An accessory kit is also planned at additional cost for two output meters and meter switching, which includes an alternative front panel. Power output: 200 watts per channel into 8? Frequency response: 20Hz to 20kHz. Total harmonic distortion: 0.25%. Input sensitivity: 1.6V. Signal to noise ratio: 95dB. Speaker load impedance: 4? Semiconductors: 38 x transistors, 2 x zener diodes, 24 x diodes, 3 x thermal sensors. Dimensions: 17 x 14.5 x 7.25 inches. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “brickaudio77″ 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, Korea, South, Indonesia, Taiwan, South Africa, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, Ukraine, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, 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, Uruguay, Russian Federation.

• Model: Stereo 410
• Modified Item: No
• Country/Region of Manufacture: United States
• Custom Bundle: No
• Featured Refinements: Vintage Stereo Amplifier
• Type: Tube Amplifier
• Brand: Dynaco

This amp is still in good physical condition. There are some marks and scratches, but no dents or damage. All tubes are intact and working well. Please use zoom to examine all areas closely and let us know if you have any questions. Has been thoroughly inspected and tested by our vintage audio technician and everything is working well. Sounds clear, powerful, and evenly balanced. We listened for hours and did not detect any hums, buzz, or crackles. Thank you for viewing! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “quyenvintage” and is located in this country: US. This item can be shipped to United States.

• Model: 80AZ
• Country/Region of Manufacture: United States
• Type: Tube Amplifier
• MPN: 80AZ
• Brand: Fisher

The front has some minor marks, mainly on the left handle, a little in the center, and some on the bottom right corner. The sides have a couple marks as well. Overall still looks very good, and no dents or damage. Please use zoom to examine all areas closely and let us know if you have any questions. The amp has been thoroughly inspected and tested by our vintage audio technician and everything works well. Sound is clear, powerful, and evenly balanced. We listened for hours and did not detect any hums, buzz, or crackles. All tubes and buttons function properly. Thank you for viewing! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “quyenvintage” and is located in this country: US. This item can be shipped to United States.

• Model: Classic 30
• Country/Region of Manufacture: United States
• Featured Refinements: Vintage Stereo Amplifier
• Type: Tube Amplifier
• Brand: Audio Research

Still looks quite good – no significant dents or damage. All tubes are intact and working perfectly well. Has been thoroughly tested by our tube technician and everything is working well. We tested with different inputs and speakers. All produced clear, powerful, and evenly balanced sound. 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: Fisher
• Type: Tube Amplifier
• Model: Fisher SA-300