Vintage Tube Amp

Pr Altec 340A Vintage Tube Amplifiers, 1950s, Clean, Serviced, Close SN. S/N: 461 & 466. Both amps have the same Peerless transformers. Parts number on the Peerless decals: Power 6142, output 16345. Very close serial numbers clean 1950s matched pair. Amps are the same circuit – schematics are paper labels on the bottom pan. No modifications to circuit design. At some point, most likely the 60s or 70s three of the same front end capacitors in each amp were changed to vintage Cornel Dublier and Sprauge. There a few very minor chips along the bottom edges of the amps. Chassis and transformers are rust free and the paint has the original glisten. The camera picked up all kinds of reflections in the paints during the snapshots. It is not unusual to see some potting compound leak from the transformers. In this case there are stains under the output transformers of each amp. In my experience this is not a sign of any trouble. Raytheon 6550 output tubes have been tested and matched on an Amplitrex AT1000. I have experienced Raytheon 6550 tubes in government contractor’s inventory. Raytheon made a very high quality product. The AT100 does a very thorough job of testing each tube twice and carefully testing for gas and increased current draw during each tube tested. The 12AY7 and 12AU7 front end tubes are quality vintage 1960s tubes, and measure almost high. What makes these amps so unusual and have such great sound is the 0A2 regulator tube on the 6550 screen voltage. Regulation is an added expense in manufacture cost but the sound quality makes it all worthwhile. This is a solid pair of classic low production amps that sound very clean, much cleaner sound than the competition’s 6550 amplifiers. The combination of clean detailed sound and the characteristic tube amp sound quality sounds great even today. New owner should be aware power supply capacitors this old will need replacement at some time. Please have the services of an experienced tube technician for future parts upgrade. IMPORTANT – Be sure to read the Terms and Conditions of Sale. Hardware Packing – Domestic and Outside US: Item will be wrapped with bubble wrap in two directions and double boxed. Use of a friend’s account or biding for a friend is not allowed. The item “Pr Altec 340A Vintage Tube Amplifiers, 1950s, Clean, Serviced, Close SN” is in sale since Friday, March 22, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “wevtt” and is located in Waltham, Massachusetts. This item can be shipped worldwide.

• Model: 340A
• Country/Region of Manufacture: United States
• Type: Power Amplifier
• Brand: Altec

64307 Please use this number in any correspondence. ETO Alpha Model 77Dx Amplifier. Links – About Me. Rare Alpha Model 77Dx Amplifier This was found in the deep storage of an old R&D facility, we sent it in for a full workover with the intent to give it to a family member who is a big HAM radio geek. Unfortunatly health issues are getting in the way. It has not been powered up since it was serviced in Jan. Comes with the original panels that are in good condition. See pictures for performance specs Comes with 30 Day return. BUT, if the amplifier has components burned orcharred, or arced over, or otherwise misused, or the 8877 has been destroyed byexcessive grid currents of improper tuning, it is NOT returnable. By purchasing thispotentially-lethal amplifier, you are representing that you are experiencedin all phases of ownership and operation of high-power amplifiers, and thatyou will always follow all appropriate safety procedures. We have no specifications or other data. See pictures for additional information. It has been tested and is working correctly It has not been powered up or used since service. It is in good physical condition. The packaged dimensions will be 24 long by 22 wide by 19 high. This item is located in San Diego, CA. We have a forklift on site. We often have similar items in other auctions. Anything not in the pictures or description is not included. If you dont receive a response, there is a problem. We are a surplus dealer, and not experts on anything we sell. We do our best to honestly describe the items we sell, and never deliberately hide any faults. However, we are human, and occasionally make mistakes. We sell new and used equipment. We describe the physical appearance, and sometimes perform a basic test. The tests we run are to give an idea of the working condition, and in some cases, we are able to fully test it. In others, we can do very little or no testing. If we do not say it is tested and working properly, we can only promise that it will perform the tests described, and nothing more. We will make every attempt to be fair and reasonable. Since we are not experts, we cannot warrant any item to be safe or operational for any purpose. Additional good or bad information about condition may appear in the item description, and we try to show any noticeable flaws in our pictures. New or New in Box items are generally not tested, and we assume them to be completely functional, unless described otherwise. This covers the cost of the box and packaging materials. Local pick-up is allowed. For large items, we will assist with loading it into your vehicle. Space in our warehouse is limited, and we are not a storage facility. Feedback extortion will not be tolerated. Our items are automatically listed as U. The item “Vintage ETO ALPHA 77Dx Ham Radio Linear RF Tube Amplifier Recently Serviced” is in sale since Tuesday, March 26, 2019. This item is in the category “Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers”. The seller is “aplussurplus” and is located in Chula Vista, California. This item can be shipped to United States.

• Model: 77Dx
• Band: RF
• MPN: 77Dx
• Brand: ETO Alpha