Amp turns on but hums. I’ve been told it needs new tubes. You can hear the guitar playing through the humming but it’s muffled. Please Look at Photos for Condition!

Vintage Harmony 400A Guitar Amplifier. This is a fully working Harmony 400A, a super cool low-watt tube guitar amp from the 1950s-60s. It runs a single-ended tube circuit with the following tubes. Estimated at 3-5 watts, this amp is not very loud, making it perfect for practice, harmonica, or mic’d recording. It delivers classic, warm lo-fi breakup, especially with single-coil pickups. Original small speaker approx. 6 Original Jensen speaker. Volume & Tone controls. Typical vintage hum/crackle when adjusting knobs. Cosmetic wear consistent with age (see photos). ? Tone: Smooth overdrive at low volume. Perfect for slide guitar, harmonica, and retro blues tone. Think early Chess Records or garage band vibes.

Up for sale here is this neat little vintage tube amplifier. This is a neat little series-string tube amp, with two 50C5 output tubes and a 12AU7 driver tube. Tubes are included but are untested and may need replacing. This appears to be a little push-pull mono amp, and could be made into a sweet little guitar amp, though you should add an isolation transformer. This has three controls and has the original knobs on it, which are in great shape. Cosmetic condition is great, with just light wear. Please see my pictures for details. If you have any questions, please ask. I have more amplifiers and other vintage electronics listed–feel free to take a look! This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “peace.love.and.music” and is located in this country: US. This item can be shipped worldwide.

• Type: Tube Amplifier
• Brand: Unbranded

This listing is for a Vintage 1965 RCA RS150 Mono Tube Amp with Dual 50C5 power tubes and a 12AX7. Consignment sale for a collector who is downsizing. In fair cosmetic condition, there may be flaws that we did not notice. This is the only one on the market – don’t let it get away! Powered by SixBit’s eCommerce Solution. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “panhandlesurplusllc” and is located in this country: US. This item can be shipped to United States.

• Type: Integrated Amplifier
• Brand: RCA
• MPN: RS150
• Country/Region of Manufacture: United States