McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

Thursday, September 22nd, 2022
McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

Retro Gear Shop is a high-end boutique store located in Nashville, Tennessee. McIntosh MC-30 Serviced For sale is a rare vintage McIntosh MC-30 monoblock tube amplifier. This one just got back from a full servicing include full recap. It’s fully functional and ready to go. Check out the pictures to make sure you like it. Any questions please ask! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “retrogearshop” and is located in this country: US. This item can be shipped worldwide.
  • Brand: McIntosh
  • Type: Tube Amplifier
  • Model: MC-30

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Tuesday, August 16th, 2022
Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

Audio Research VT200 MKI Vintage Tube Amplifier Serviced 200W

SkyFi Audio – Curators of Vintage Audio Gear. 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 are big fans of the VT100 variation which we have a hard time keeping in stock. This is its larger brother VT200 MKI at twice the power, but with the same design and build quality. This is a very powerful tube amp capable of driving difficult loads with the same neutral and clear sound that you would expect from Audio Research. It has facilities for balanced and single ended operation and offers speaker connections from 1 ohm to 16 ohms. Serviced in house and working beautifully. Little to no signs of use cosmetically. Includes a custom dust cover (for when the amp is not in use obviously), and the manual. SkyFi Service Notes. All driver tubes replaced. Front end adjustments and bias set to service manual specification. Tube Notes. All driver tubes replaced with matched balanced JJ E88CC. All output tubes are pre-owned matched quads of Svetlana 6550 ribbed plate (Not Winged C). The SkyFi Testing Process for Tube Amplifiers. We start with a visual inspection of all internal components to make sure that there are no signs of heat stress or damage. Capacitors are checked for telltale signs of predictive failure including bulging, shrunken wrappers, or physical leakage. We also inspect resistors and other passive components for signs of overheating. If tube arcing has occurred in the past we can usually spot discoloration on the output tube sockets. On vintage units we often spot check select capacitors for value and ESR. If the amplifier passes visual inspection, we move on to a full test of all of the tubes. We use an Amplitrex AT-1000 Tube Tester which is capable of testing both emission and Gm with a high degree of accuracy. We document the results of each tube and replace any weak or suspect tubes before proceeding. When we power on tube amplifiers for the first time we usually use a variac and current limited AC supply and slowly raise the voltage up to nominal mains level while monitoring plate, screen, filament, and negative bias supply voltages where applicable. If everything is in order we feed a low level test signal into the amplifier’s input and monitor its output on an oscilloscope across an 8 ohm dummy load. At this point we are just looking to verify basic function and confirm that the output transformers are not damaged. Once we have verified that the amplifier is safe to operate, we connected it to full mains power. For cathode biased amps we monitor the plate to cathode voltage to determine if the output tubes are operating in a safe range. Once the output section is verified we move onto bench evaluation. We start by feeding the input of the amplifier with a low level 1KHz test signal, slowly increase its amplitude while monitoring the amplifier’s output on an oscilloscope for signs of noise, clipping, distortion, or improper channel balance. We continue increasing the signal level until the amplifier reaches clipping. At this point we take an output power measurement and compare it to the spec sheet of the amplifier to verify proper performance. We finish off the bench evaluation with a 1KHz square wave check and a 20Hz to 20KHz sine sweep to assess the amplifier’s frequency response characteristics. This battery of tests will usually reveal if the amplifier has any issues that need further attention. Before the device leaves the bench, we perform a listening test with actual music using a variety of preferred test tracks. Our benches are outfitted with familiar monitor speakers which help us identify inconsistencies that will not always show up on our test gear. The main things that we are listening for are hum or noise with no signal present, proper center image, clicks, pops, or any other obvious undesirable audio characteristics. If the unit passes all of these tests it is moved to our long term testing rig where we simulate real word operating conditions for 6-8 hours. For tube amps we like to run this test at least twice. This allows us to monitor the unit for signs of thermal runaway or intermittent issues that only crop up when it has fully come up to temperature. We find this step to be essential, especially for vintage units. More from Audio Research: The VT200 vacuum tube stereo power amplifier is the most powerful of the three VT-series models. Rated at 200 watts per channel into a wide range of speaker loads, the VT200 encompasses a “dual mono” circuit layout reaching back to the massive single power transformer. Eight matched pair of 6650C output tubes and 674 joules of distributed energy storage give the VT200 unwavering control over the most difficult speaker loads, without sacrificing dynamic freedom or musical nuance. Separate left and right input and output circuit boards, with distributed power supplies, keep signal path lengths at a minimum for quicker transient attack and explosive musical dynamics. As with other VT models, constant-current sources in the input stage help maintain stable drive characteristics and differential balance of the output stage under the rapidly changing demands of actual music reproduction. Ultralinear output transformers with partial cathode coupling to the output terminals give the VT200 higher efficiency and lower output impedance than conventional vacuum-tube amplifiers. This results in better control of the loudspeaker throughout its frequency and impedance spectrum. Both single-ended (100K ohms) and balanced (200K ohms) inputs are included to allow use with any high-quality stereo preamplifier. Custom-machined, gold-over-brass five-way output terminals allow a secure, high-contact connection to a variety of speaker impedances: 1, 2, 4, 8 or 16 ohms. Internally, the VT200 presents a very open architecture within a spacious, rugged chassis. A single cooling fan operable at three different speeds provides unobstrusive cooling of interior components, including the vacuum tubes mounted along the chassis sidewalls. Biasing of the output tubes is easily accomplished via two trim pots for each channel, accessible through holes located along each sidewall of the chassis. Complete retubing kits of tested, selected and matched tubes for the VT200 are available through authorized Audio Research dealers, or from the factory. DETAILS and SPECIFICATIONS – MKI Tube stereo amplifier. 200 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 200 watts, below. 01% at 1 watt. Approximate actual power available at “clipping”:210 watts (1kHz) Note that the actual RMS power output is dependent upon both line voltage and “condition” ie: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical. (-3dB points) 12Hz to 120kHz. (-3dB points at 1 watt) 0.5Hz to 200 kHz. 2.5V RMS (Bal or SE) for rated output. (27 dB gain into 16 ohms). 200K ohms Balanced, 100K ohms Single-ended. 1, 2, 4, 8, 16 ohms. Approximately 0.8dB 16 ohm load to open circuit. Less than 0.2mV RMS – 109dB below rated output (IHF weighted, input shorted, 16 ohm output). POWER SUPPLY ENERGY STORAGE. 105-125VAC 60Hz (210-250VAC 50Hz) 990 watts at rated output, 1200 watts maximum, 680 watts at “idle”. VT200: (8 matched pairs) 6550C power output, (6) 6922 driver, (4) 6922 input. 19″ (48.3 cm) W x 10½” (26.7 cm) H x 23.6 (60.0 cm) D. Handles extend 1½ (3.8 cm) forward. (46.5 kg) Net; 148 lbs. Yes – Power Only. We have too many items for sale and it is nearly impossible to keep track of offers outside of the official system. We are currently operating from our shop inside our dedicated building in Glen Rock, NJ. 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.
  • Brand: Audio Research
  • Type: Tube Amplifier
  • MPN: VT200 MKI
  • Model: VT200 MKI
  • Country/Region of Manufacture: United States

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Thursday, August 11th, 2022
Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Vintage Scott 299 Tube Stereo Integrated Amplifier. Serviced

Thanks for visiting our store. We’re the top Electronic Repair & Restoration and trusted authorization store for most of the famous audio brands in Ottawa, Ontario, Canada with more than 30 years of experience in this business. Scott 299 Tube Stereo Integrated Amplifier. This unit has been serviced by our technicians before listing for sale with new cap-kit, all the tubes are in perfect condition over 70% performace, deoxidized all the buttons and switches, cleaned from the inside out, and tested carefully. The unit is in serviced – Excellent Condition! There are no damage at all. The front panel look shiny with cleaned details buttons, knobs and upgraded light system. The case is custom- not original – looks good on the unit but not fully fit as pictures shown. Frequency response: 20 – 30,000 Hz (with tone controls set flat). Total Harmonic Distortion: 0,8% at full power output. IM Distortion: 0,3%. Noise equivalent to 10 microvolts on low level input. Hum better than 80 dB below full power output. 3 milivolts for rated output (will accomodate all low output pickups). Outputs: Stereo Tape Recorder; 4, 8 and 16 ohm speaker output for each chan. Please examine all the pics and ask any questions prior purchasing. Customer Pick-Up can be arranged for local sales if it can be done in a timely manner. Hours of operation are Monday to Friday 10:00AM to 6:00PM EST. Or On Saturday 10:00AM to 2:00PM. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “hitronics-ottawa” and is located in this country: CA. This item can be shipped worldwide.
  • Type: Integrated Amplifier
  • Brand: SCOTT

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

Monday, July 25th, 2022
McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

McIntosh MC-30 Monoblock Audio Amplifier Tube Amp MC30 Vintage Rare Serviced

Retro Gear Shop is a high-end boutique store located in Nashville, Tennessee. McIntosh MC-30 Serviced For sale is a rare vintage McIntosh MC-30 monoblock tube amplifier. This one just got back from a full servicing include full recap. It’s fully functional and ready to go. Check out the pictures to make sure you like it. Any questions please ask! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “retrogearshop” and is located in this country: US. This item can be shipped worldwide.
  • Brand: McIntosh
  • Type: Power Amplifier
  • Model: MC-30

Vintage philips mble bbo 845 tube amplifier recapped serviced

Tuesday, May 24th, 2022
Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Vintage philips mble bbo 845 tube amplifier recapped serviced

Philips mble bbo 845 from 1961 in very good working and cosmetic condition [seviced - recapped] very good sound!! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “sniflis” and is located in this country: GR. This item can be shipped worldwide.
  • Model: 845
  • Type: Tube Amplifier
  • Brand: Philips

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

Tuesday, May 10th, 2022
AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier Professionally Serviced Vintage

AudioPrism Debut Stereo Tube Amplifier. This amplifier has been professionally serviced and biased, ready to go. Cosmetically has some wear from previous use including scuffs and scratches. Includes Amplifier as pictured. No additional items or accessories are included. No power cable included. Quantity listing with reference photo, you may not receive the actual item pictured. Please feel free to message us with any questions you may have. Thank you for checking out our listing. Doing so is against US and international law. Unless otherwise stated above, all auctions include 30 day DOA guarantee. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “ntc_tech” and is located in this country: US. This item can be shipped worldwide.
  • Brand: AudioPrism
  • MPN: Debut

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Monday, April 18th, 2022
Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Vintage Dynaco Tube Music System ST-70/Dyna Pas/FM-3. Serviced

Thanks for visiting our store. We’re the top Electronic Repair & Restoration and trusted authorization store for most of the famous audio brands in Ottawa, Ontario, Canada with more than 30 years of experience in this business. Dynaco Tube Music System – ST-70/Dyna Pas/FM-3. This system has been serviced by our technicians before listing for sale with new Cap-Kit, Tube-Kit, light-kit and fuses, complete overhauled and deoxidized all buttons and switches. Deep cleaned from the inside out and tested every single components. All the other tubes are above 70% performance capacity! This system is in serviced – excellent condition! There is no damage on all 3 units – just a few marks but barely visible. All 3 are working excellent as it should be, fully functional and deliver excellent sound quality! Rated power: 35Wpc (15.44dBW/8 ohms), 20-20kHz, at less than 0.25% THD. IM distortion: less than 1% up to 30W. Frequency response: 20-20kHz ±0.5dB at rated power. Input sensitivity: 1.3V. Please examine all the pics and ask any questions prior purchasing. Customer Pick-Up can be arranged for local sales if it can be done in a timely manner. Hours of operation are Monday to Friday 10:00AM to 6:00PM EST. Or On Saturday 10:00AM to 2:00PM. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “hitronics-ottawa” and is located in this country: CA. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.
  • Model: st-70
  • Type: Power Amplifier
  • Brand: Dynaco

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Thursday, March 24th, 2022
Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Marantz Model 8b Vintage Stereo Amplifier Serviced Cleaned Tested

Famous machine MARANTZ MODEL 8B Original vacuum tube type stereo power amplifier output: 35W + 35W Input terminal, power cable replacement, maintenance completed. We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “sunshine-tokyo” and is located in this country: JP. This item can be shipped worldwide.
  • Brand: Marantz
  • MPN: MARANTZ MODEL 8B
  • Model: MARANTZ MODEL 8B
  • Country/Region of Manufacture: United States
  • Type: VINTAGE STEREO AMPLIFIER

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Friday, March 18th, 2022
Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

Vintage Bell BE35 Tube Amplifier Guitar Head Serviced and Restored

This converted PA amp is a unique combination of 60s flavor and rock and roll of the 70s. Has a charming EQ that is fixed in circuit. Front panel right to left. Power, tone (5 positions), phono/aux, mic 2, mode, mic 1. Channels are combined to give you all of the character of the amp. Amp has 4,8,16 ohm 1/4 jacks on back. Two 1/4 jack inputs and also a set of rcas jacks if you wish. Tested and ready to inspire! Thank you for looking! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “moobfuuter” and is located in this country: US. This item can be shipped to United States.
  • Brand: Bell
  • Type: Tube Amplifier
  • Modification Description: PA to Guitar Amplifier Conversion
  • Custom Bundle: No
  • Model: Bell BE35
  • Country/Region of Manufacture: United States
  • Modified Item: Yes

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Friday, March 18th, 2022
Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Bogen Challenger CH30 1940s 6L6 Vintage Tube Guitar Amplifier Serviced & Ready

Pa Amplifier from the 1940s. Completely rebuilt by us as a guitar amp. All channels are combined to allow all tones from one signal. Very flexible tone wise. 4,8,16 ohm operation. Will run any cab. I answer all questions. (msg me for international). This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “moobfuuter” and is located in this country: US. This item can be shipped to United States.
  • Brand: Bogen
  • Type: Tube Amplifier
  • Modification Description: Converted Public Address Amplifier into Guitar Amp
  • Custom Bundle: No
  • Model: CH30
  • Country/Region of Manufacture: United States
  • Modified Item: Yes