Vintage Tube Amp

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

Who is Johnny Roadhouse. Drum Sticks & Mallets. Folk & World Instruments. Books and DVD’s. Selmer TruVoice Bassmaster Fifty. There is a fault which causes the amp to emit a loud buzz if certain knobs on the front panel are pushed. Back cover is missing. Please look at all the photos carefully and feel free to get in touch with any questions. Check Out Our Manchester Showroom. Johnny Roadhouse Music is home to a huge range modern and traditional instruments. A vast array of instruments and accessories accross three floors. Folk, Brass & Woodwind upstairs – Guitars, Amps, Keyboards on the ground floor – Drums & Percussion downstairs. We are an independent, family-run high street musical instrument shop based in Manchester, UK. A three-floor superstore, all instruments and equipment. Established over 55 years in the same spot on Oxford Road. We sell everything from Guitars to Accordions, Drum Kits to Didgeridoos, Banjos to Synthesizers, Gu Zhengs to Ouds. We specialise in both new and pre-owned gear. We are run by musicians, for musicians – always committed to serving the musical community and offering the best customer experiences possible. We are here to help, don’t hesitate to get in touch if you have a question or need advice. Please note, if you are collecting the item from our shop in Manchester, we ask for cash/card on collection. 123 Oxford Road All Saints. Hohner Special 20 Harmonica (Mouth Organ/Harp) – All Keys Available FREE UK P&P. Hohner Marine Band 1896 Harmonica (Mouth Organ) – All Keys Available FREE UK P&P. Hohner Blues Harp MS Harmonica (Mouth Organ) – All Keys Available FREE UK P&P. Hohner Golden Melody Harmonica (Mouth Organ/Harp) All Keys Available FREE UK P&P. For NEW items we can offer a VAT receipt with the VAT displayed separately. For PRE-OWNED items we cannot display the VAT separately. We operate under the MARGIN VAT scheme for second hand items, the rules of this scheme do not allow us to offer a VAT breakdown on pre-owned items. Boss ME-20B Multi Effects Pedal. Hohner Harmonicas, Pro Harp Cross Harp Marine Band Big River Cheap Many Keys. Delivered on time, product as expected. TOA A-2060 60 Watt 100V Line Amplifier. Hope to deal with you again. Guys at shop great. Blackstar ID:60 TVP Combo Guitar Amplifier. VIC FIRTH Drum Sticks Hickory Peter Erskine ORIGINAL SPE WOOD Tip (Pair) VF-SPE. Come and visit us in Manchester! We are Manchesters most famous family-owned and run music superstore. We were established over 60 years ago by Johnny Roadhouse Snr, a professional and world renowned saxophonist who sadly passed away in April 2009. The shop is run by his son, also called John Roadhouse. Guitars, drums, saxophones, banjos, accordions, anklungs & everything in between! We are an independent music shop, we pride ourselves on our customer service. If you have any questions at all, or need advice, dont hesitate to get in touch. Dont see what youre looking for? Cant quite figure out which guitar is for you? Not sure which harmonica key fits your tune? Were always happy to help! Johnny Roadhouse Music 123 Oxford Road Manchester M1 7DU We are a bricks & mortar shop based in Manchester, UK. A three floor superstore cram packed with instruments. On the ground floor is our guitar department – head upstairs for brass, woodwind & folk – and downstairs to drums & percussion. The item “Vintage’60s Selmer TruVoice Bassmaster Fifty Crocodile Skin Valve Tube Amp Head” is in sale since Monday, September 6, 2021. This item is in the category “Musical Instruments\Guitars & Basses\Guitar Amplifiers”. The seller is “joh9″ and is located in Manchester. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Egypt, Guernsey, Gibraltar, Guadeloupe, French guiana, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Saudi arabia, South africa, United arab emirates, Ukraine, Bahamas, Colombia, Jamaica, Kuwait, Panama, Philippines, Qatar, Uruguay.

• Amplifier Type: Head
• Brand: Selmer

This was pulled from a completely functional console stereo. Please ask any questions you may have! What you see is EXACTLY what you get, nothing more or less. Any testing that has been done will be listed in the description. We leave feedback as soon as we get feedback from you. If you have any problems with your item, please let us know ASAP so we can do our best to resolve any issues! If it’s not in the picture, it probably doesn’t come with it. We do not accept responsibility for damage after the item leaves our location. It will leave our building in good condition. Please inspect your items upon receipt. We test every piece we are capable of, prior to sending it out. We sell our equipment at a deep discount from the new price and want you to consider it as NOT WORKING regardless of the pictures so you understand that if you need a part like a thermostat or something… We do not account for this. Our reputation is very important to us and we work very hard at listing only our best equipment for sale, stating it accurately and honestly in the listing, and sending out only a quality product. Thank you for your interest in our equipment. PLEASE INSPECT THE PICTURES CAREFULLY. The item “Vintage 1960′s Magnavox Stereo Tube Amplifier FREE SHIPPING” is in sale since Friday, August 6, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “newlife313″ and is located in New Boston, Michigan. This item can be shipped to United States, Canada, United Kingdom, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, 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: Magnavox
• Type: Tube Amplifier

We really try to offer a complete 5 star service. The free listing tool. The item “Vintage 1964 Fender Showman Tube Amplifier Original Output Transformer 125A30A” is in sale since Saturday, September 26, 2020. This item is in the category “Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Guitar Amplifiers”. The seller is “bnjvintageguitars” and is located in Canyon, Texas. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, Brazil, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Costa rica, Panama, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.

• Brand: Fender
• Exact Year: 1964

Vintage 1961/62 Harmony H306 tube amp combo, used. Cool sounding 60 year old amp. Pretty clean tone unless you dime it and then it still tends to be slightly clean. I think this amp would take pedals nicely. Footswitch jack works when shorting plug. No footswitch is included. Has had some recent capacitor work done, ie: filter caps and some tremolo caps. Power cord upgrade from 2 prong to 3 prong, old cord included. Tubes: 5Y3, 6V6, 6V6, 12AX7, 12AX7, 6SH7(tremolo). Power Transformer: Tranco (867) #4670, Aug 1961. Output Transformer: Tranco (867) #3427 Aug 1961. Speaker 12 Jensen C12R (220-142). Cabinet: Wear from years of use, covering has some biffs and scuffs, speaker grill cloth appears changed as some time. Leather handle strap is worn but still useable. Chassis tube lettering is legible as well as the front control panel. I specifically use Ebays. US ADDRESSES WITHIN THE LOWER 48 STATES ONLY! Used, as-is, where-is and is not warranted in any manner whatsoever. The majority of my items are tested as best as possible and as described. Items marked as-found or otherwise for parts or repair typically have had marginal testing, if any testing at all and may have missing components, as I don’t inspect those items thoroughly, as it is just not economically worth it. I must be informed, within 24 hours of receipt of your package, of any damage. All damage claims must be filed promptly and all packaging retained. Timely communication is essential for any damage or loss claim to be successful. As the case may be. The item “Vintage 1961 1962 Harmony H306 Combo Tube Amp Used” is in sale since Saturday, May 15, 2021. This item is in the category “Musical Instruments & Gear\Guitars & Basses\Guitar Amplifiers”. The seller is “loudmusic” and is located in Camano Island, Washington. This item can be shipped to United States.

• Number of Speakers: 1
• Brand: Harmony
• Number of Channels: 2
• Model: H306
• Country/Region of Manufacture: United States
• Amplifier Type: Combo
• Power: 15 W
• Amplifier Technology: Vacuum Tube

Vintage 1965 Fender Bandmaster Blackface AB763 Guitar Tube Amplifier Amp Head. Dates to early 1965. Has been modified long ago with a 1964 Twin/Showman transformer to accommodate four power tubes. The rest of the iron is original dating to 1965. Operates as normal when using only two power tubes running at 40 watts. The feel is there and has all the great tone youd expect from a classic amp such as this. Included is a brand new full set of JJ Tubes including two matched 6L6gc power tubes. No foot switch included. The item “1965 Fender Bandmaster Blackface AB763 Vintage Tube Guitar Amplifier Amp Head” is in sale since Wednesday, September 8, 2021. This item is in the category “Musical Instruments & Gear\Vintage Musical Instruments\Vintage Guitars & Basses\Guitar Amplifiers”. The seller is “the_narwhals_den” and is located in Hendersonville, North Carolina. 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, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Panama, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.

• Brand: Fender
• Modification Description: Twin/Showman 1964 Transformer Power Upgrade
• Custom Bundle: No
• Exact Year: 1965
• Model: 1965 Blackface Band-Master
• MPN: Does not apply
• Country/Region of Manufacture: United States
• Modified Item: Yes

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

Refer to the photos. There are a few cut wires and clearly it’s going to need a little work. But it’s pretty much all there. It’ll be an easy project for any decent electronics technician. The item “Vintage Dynaco SCA-35 Tube Type Integrated Amplifier Factory Wired, NEEDS WORK” 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: Dynaco SCA-35
• Type: Integrated Amplifier
• Brand: Dynaco

Heathkit AA-151 Vintage Tube Stereo Power Amplifier. I recently picked this up from a local CT estate with some other quality electronics. I’ve only tested this for power. It may be missing one tube in the rear as you can see in the pictures. It is very clean on the inside, no dust or residue at all. Appears to have been lightly used if at all. The Heathkit label is missing from the front and it does have some minor scratches on it. The power cord is clean and in good shape. There is no owners manual with this. I did try it with some JBL’s but got no sound. If there is a trick to connecting 8 ohm speakers please let me know and I’ll try again. Otherwise it may need the missing tube. Time to le it go… The item “Heathkit AA-151 Vintage Tube Stereo Power Amplifier Very Nice Estate Find” is in sale since Sunday, August 2, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “corporate_office_supply” and is located in Taftville, Connecticut. This item can be shipped to United States, Canada, United Kingdom, China, Germany, Japan, France, Australia.

• Brand: Heathkit
• Model: AA-151
• Featured Refinements: Vintage Stereo Amplifier
• Type: Power Amplifier
• MPN: AA-151
• UPC: DoesNotApply

For sale is a used H. Scott Stereomaster tube integrated amplifier. The model number is LK-72-B. The pre-amp has been tested by me using a Scott 110-B Tuner. The amp sounds good in both channels. There is a small amount of static in the volume when turned up and down but quits when the knob stops turning. The faceplate looks pretty good. I have not tested the strength of the tubes. The unswitched RED plug has a crack in the plastic as shown in photos. You will get exactly what you see in the photos with your order. F YOU HAVE ANY QUESTIONS, PLEASE FEEL FREE TO CONTACT ME. You will not be disappointed. My feedback speaks for itself. If you have problems with your order, PLEASE CONTACT ME BEFORE LEAVING FEEDBACK. The item “H. H. Scott Stereomaster LK-72-B Tube Integrated Amplifier Pre-Amp Vintage” is in sale since Thursday, July 29, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “marknmandee” and is located in Westerville, Ohio. This item can be shipped worldwide.

• Model: H.H. Scott Stereomaster LK-72-B
• Modified Item: No
• Country/Region of Manufacture: United States
• Type: Integrated Amplifier
• MPN: LK-72-B
• Brand: H.H. Scott
• location: mar 7-29-2021 O-2