I’m letting go of a few things from from my collection, including this Hoffman A 300 vintage tube amplifier project. This old tube radio chassis has been stripped of the radio components, and is ready to convert into a killer guitar amp! Has the right voltage range for a 5C1 Octal Champ, either use the 6×5 rectifier or convert to diodes to raise the B+. Power and output transformers are there, and tube sockets. Needs your own circuit installed – and typical updates like new. Servicing, caps, desired mods/conversion, and tubes if you want different than stock.

This listing is for a Vintage 1950 Hoffman PPP 6K6 Mono Tube Amp, Ideal for converting to a Parallel Push Pull Harp or Guitar Amplifier or for restoring a Hoffman console. It came from a Hoffman model 538 radio / record player and comprises the power & amplifier section of chassis # 168 (the tuner section will be listed separately). The schematic is in Rider’s Volume 22, which covers 1951, but both the tuner section and the speaker have 1950 dates, so that’s what we’re going with. The tube lineup is 4 x 6K6GT, in PPP, driven by a 6J5GT with a 5U4G rectifier. Prior to listing it was brought up on a variac and played well. 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: Power Amplifier
• Brand: Hoffman
• Model: 168