Vintage Tube Amp

Harman Kardon Trio A224 Vintage Tube Amplifier Classic Audio Model A224.

For Sale is a Vintage WW2 Tube Amplifier Control Unit & Loudspeaker System MK1 For Royal Canadian Signals By Vancouver Radio Labs. I Do My Best To Describe Each Item I Sell Accurately, and Disclose any Defects.

VINTAGE EICO MODEL HF-20 TUBE AMPLIFIER.

THIS COMES AS PICTURED. I WOULD GUESS IT NEEDS THE WAX AND PAPER CAPS REPLACED AT LEAST JUST TO BE SAFE. IT WILL COME WITH ALL THE TUBES SHOWN. ALL OTHERS TO USE EIS.

Vintage 1962 HH Scott Stereomaster 222C Tube Amplifier – SHOWN WORKING READ. They will be pulled using gloves, and will be labeled as to exactly where they were pulled from so they can be placed back in their original locations. About this unit: When the unit first made it into my hands it was missing all knobs and I was unable to get the unit to power on (which turned out to be just because I didn’t know how). I sent the unit off to my technician a retired E. E and had him give the unit a once over. While he was able to get the unit to power on he wasn’t able to get sound out of it. So he ran some tests and got the unit up and running again (his full notes can be read at the bottom of the listing), in total he. Cleaned the selector switch’s using deoxit, allowing the unit to properly play sound again. Tested all electrolytic capacitors with an ESR meter and found that they were all in good working condition. Tested and confirmed all tubes in the unit were working as intended. Ran the unit under a dummy load at 20WPC for 2 hours to ensure the unit wouldn’t blow itself up. In his testing he found signs the unit had previously been worked on, finding many (but not all) of the ceramic tube capacitors had been replaced with “Orange Drop” caps (see final photo of the unit on the listing). The note from my technician, and a printed copy of the owners manual will be provided with the unit. NO original packaging, manuals, or other accessories included. Feel free to message with any questions related to this listing. DM us for more information. Scott model 222C Stereo Laboratory Amplifier s/n 151945 component date codes 1962. All of the knobs are missing. Complaint was that it would not power up at all. I found that the tubes did light up, but that indeed, there was no sound. By trying all of the controls, I found that the tape monitor slide switch was intermittent. Treating that switch with DeOxit fixed it. Other tests and observations: I also applied DeOxit to the selector switches. No treatment of any of the pots, which were quiet and felt smooth. Testing the electrolytic capacitors with an ESR meter found that they are all okay, with ESR numbers far lower than the series resistors. Tested the tubes, which were all okay. The 7178 output tubes have no brand visible, but all 4 appear the same. Three of the 12AX7 input tubes are Telefunken, but the fourth is Sylvania. Removed dust with compressed air and mild cleaning of the chassis with a damp cloth. The amplifier was tested powering speakers and a dummy load at up to 20 W/channel, and about 5W/channel for 2 hours. As received, this amplifier was missing all of its knobs. They were replaced with new black bakelite knobs (Davies Molding p/n 1104). The new knobs do not match the originals, but they are clean and functional. They are easily changed if original style ones can be found. Note that there are some signs that this unit has been worked on before, mainly that most, but not all, of the white ceramic tube capacitors have been replaced with Sprague “Orange Drop” caps. Also the bottom cover is fastened by just 4 screws, 5 others are missing.

Was ready to recap and rework as necessary and come up with nothing, plays great nothing gets hot no hum, all good. This piece is gorgeous. This one has Sylvania 6BQ5s.

One light bulb turned on.

Both tubes appear to have the same date code of SJ (although faint on one) which should put them as being from 1975. The print on these tubes is fragile and will easily rub off, much of the white print has already rubbed off, but the etched identifying number is still clearly visible. Although used, these tubes should still have some decent life left in them and are priced accordingly. The tubes’ test results are displayed in the photos (New 6550 Spec 100% =11,000 Gm). See the photos for physical / cosmetic condition. Notes Regarding Tube Tests. All tubes are tested on an Amplitrex AT-1000 tester in the automatic Fixed Bias Mode (for the most conservative results). Test Results are for a general reference only, and are not a guarantee of performance, nor a guarantee of how they will test on your tester. No real world (audio) performance measurements are taken.

Up for sale is one New Opened Box Pair of Vintage Amplifiers U. S Navy/Mil made in 1953. They are made by Atlas Engineering and used UTC transformers or UTC rebranded Atlas transformers. They are amplifier modules. There is no cables included but I think A Tube Amp repair person can easily identity input and output connections. Tubes are not included with this sale. Each amplifier used 2 x 6SN7 but they were removed for my other amplifiers project. What you see is what you get.