I am extremely new to building tube amplifiers. I've never done this
before, but this concept intrigued me alot, therefore I decided to build
one. I followed a schematic of a 20W pc tube amplifer. To my knowledge,
and to checking my work multiple times, I have followed the schematic
religiously. I think it's from an old Magnavox amplifier.
When the amp switches on, there is an insane amount of noise, even when
there is no audio input given. The only modification I have made is that
I have changed is the main power tranformer's primary voltage due to
where I live. (120x2)
I'm not allowed to post the schematic's diagram, but I may link the page:
http://www.wkinsler.com/radios/7tubeamp1.html
If anyone could please dissect the schematic to see if there could be a
potential problem with the design itself, that would be fantastic.
I have also takena a video of my amp groaning the noise away to glory:
(One of the pre amps do not work, but then i disconnected one side of
the amp, and the noise still existed)
https://www.youtube.com/watch?v=Myj-aIommmA
