Reading the last few posts, I think I misinterpreted the OPs use of 'a perfect sine wave'.
I was assuming he meant that literally, with zero distortion, which of course isn't possible in this (or any) amp.
But I think he meant a sine wave that to the naked eye on a scope looks 'perfect'.
Jan
I was assuming he meant that literally, with zero distortion, which of course isn't possible in this (or any) amp.
But I think he meant a sine wave that to the naked eye on a scope looks 'perfect'.
Jan
If everything is ideal, the signal at the red circle would be perfect sine, in phase with the input signal, and exactly half amplitude of the input signal.
But real world tubes are not ideal, meaning the signal will not be perfect sine and not half amplitude. If the circuit is well designed, these would be close.
But real world tubes are not ideal, meaning the signal will not be perfect sine and not half amplitude. If the circuit is well designed, these would be close.
What also wasn't clear was what he meant with 'when everything else is perfect ... '. What else?
In other words, such an ambiguous question that any answer fits 😎
Jan
In other words, such an ambiguous question that any answer fits 😎
Jan
This started with "perfect". After a lot of jabber we learned "wont work". Which is not a useful problem summary.
"Won't work" both channels suggests power supply or a bad patchcord. And more questions. And non-answers? We will fill-up the forum at the rate this is going.
An update. I bypassed the circuitry with the IRF840 and the IXCP10M45S. Put a 100K from R23 to R14. R35 directly to ground. And now the amp is working again, as it should. If I`m allowed to use those words? In other words, it plays music "perfectly".
