Amp seemed to develop a noise problem the other day. Dont know how it happened but whenevcr a guitar lead wa plugged into it, there was a loud , very loud hum from the speaker. Using the test diagram and instructions on Ampmakers site, I was able to quickly diagnose the problem - a bad earth caused by a whisker of soldered wire poking through the insulation on one of the shielded cables from the input sockets.
After this was tidied up, it all went back to how it was. Have to say, when building the amp, I found the input socket wiring to be the hardest part, definitely very fiddly. I was never terribly happy with the finished result. I may order up a new set of sockets and resistors and re-do it a bit neater. We'll see!
Test pages here:
PP18 Initial testing
Bye for now
James
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