Single Ended Guitar Amp Conversion from a Bush RP20 Record Player 

Thanks Ron. Thanks for the support. Take care mate.

There is a great online article from Guitarist magazine about a one valve reverb tank driver and recovery circuit. It's a circuit inspired by a Swart Amplifiers design, the valve is in effect a 12AU7 low voltage gain but high amp (power) to physically shake the springs and the second valve section like a 12AX7 (high volt gain) to amplify the weak output at the far end of the springs. I built it into a Deluxe based mini amp, sounds great and takes minimal space on a small chassis. Had to order tank and valve from Germany and it's a short 8" tank, would fit fine in that nice Bush cabinet.

Now there's an idea

Hello Rob. This sounds interesting. I will have a read. Take care mate.

​​​@@robnic52 5k/4ohm output transformer could quite well be used when 12AU7/ECC82 (triodes parallel) is driving a 8 ohm rever tank. Fenders used 12AT7 as a driver tube but it needs a bit higher load impedance than 12AU7 to give optimal output power. One option could be to use EL84 connected to triode to drive the tank. Or a bit crazy option would be to drive two paralleled 8 ohm tanks using 5k/4ohm OT and EL84 as a pentode or triode.

Over here we call them valves. In the Eastern block they are called Bulbs. Where as in the States they are called Tubes. I try to refer to them as tubes as well but sometimes I forget.

Hello Ron. Here is a link to them. uk.rs-online.com/web/p/speaker-drivers/4318686

@@vintageguitaramp_guitarteacher Thanks my friend

gracias por ver. Cuidarse.