Tube Amp Archive

if you want to make transformer change, and have no idea about electricity.. this is not good way :P i dont want to say it is impossible, but will be very difficult to you. actually it is simple, order proper transformer.. see the wire diagram.. locate the terminals on the pcb in the amp, they are ...

extra wires are for the primary voltage selection, if you are in Europe, you need only 240V/ that is what the Hammond transformer providing on primary Okay, thanks! I think it’s beyond my knowledge to try to fix that and to figure out how to make it work in my amp. I guess I’ll have to take it to a...

without the bolts for sure you will have some mechanical noise, you can buy from the local store.. i think M4 will be ok.. also plastic washer below the bolts will be good to reduce the losses in the core,humming will be less, but is difficult to find m4.png Yeah but the noise was there before the ...

Do you have any idea why the Hammond transformer have 9 wires and the original has 13 wires? I’m no electrician so I can’t figure out how to setup that transformer with only 9 wires to fit. I know how to solder and do tweaks in amps from instructions on what to remove or ad and pedals from tagbord l...

Most of the times PTs hum when they where not potted correctly during manufacturing, or they have been due to circuit or tube issues running hot. The heat up and cool down cycles ( expansion and contraction) can brake down the potting over time with the result of vibrating coils. On vintage amps wi...

first to understand better, remove the output tubes and start the amp. if it humms then all is from power transformer.. if not, it is not from power transformer. like this you can leave only output tubes, and rwmove PI. if it humms now, and not with the PT, then is coming from output tubes. you nee...

Hi! I bought a hot rod deville for dirt cheap. Didn’t noticed any hum when I pick it up from the seller. But back home I hear a hum from the power transformer. I have taken it apart and been thinking of switch the power transformer(original part) but they seem to not be available at any online store...