Recent content by persons0

Thanks Glenn. I adjusted the offset and all is well. It is sounding better than ever!

Sorry to bring this thread back from the dead but I never ended up fixing the amp and it has been sitting on the shelf ever since. I have a question regarding the DC offset adjustment. Where do I take the voltage reading from and what should the target reading be? Thank you!

Glad to hear all went well. I hope she enjoys it!

Another smooth transaction with a great AK'er. Thanks Ernie.

I got it and I like it. :music: Its not as good as Rage but not bad either.

No I did not. There are two pots and I am not sure which one I should be adjusting.

Transistors are installed in the correct orentation. I tried powering it up again and now the relay clicks and it does exactly what I described in the original post. Looks like its back to the drawing board :tears:

Bump!

Polishing a turd.

I have replaced the transistors and now the relay does not click in at all. I am thinking that maybe I need to adjust the bias or offset or something? Does that seem right? Thanks

Have not gotten a chance to change the transistors yet. I will have it done this week.

Transistors arrived today! I will be replacing them tonight and I will post back with the results. Thanks!

Top Gear, The Office, Mythbusters

That picture is not of my actual board (found it online). I still have the original trim pots. Where is a good place to buy the 2SA620 transistors and how many are needed in order to find a matched pair?

The left pair are marked "A620" and the right pair are "2SA856". There are also 2 other transistors just under the trim pots. They are "2SC1746" and "2SC1451". Which of these should I replace? Where can I buy replacements and how much do they cost? Thanks, Alex