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In Reply to: RE: Problem AN Kit One: Noise on Output Transformers posted by Tre' on May 22, 2015 at 10:19:58
Yes the scheme is similar
Interesting.
Have you done something like that on your amp?
An what about the C9/C8 that is related to the potentiometer? has the same value.
Follow Ups:
Yes.
I have a .003535uf cap feeding a 330k ohm grid resistor of the input stage to limit the LF at 136Hz.
This is in a bi amp system. There is a SS amp driving the woofers.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Just drop the grid resistor to 100K and you may fix 2 problems.
What problem?Edit; I'm guessing that when grid current is drawn the cap will charge and then the bias will take a long time to recover?
I think beto1's biggest problem is that his speakers are not efficient enough for a SE 300b amp.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 05/22/15 05/22/15
Tre',
if the speaker's efficiency is related in that way with this noise, you are right. I have a 91dB speaker that sound well on a medium size listening room, but not an ideal match for a low powered SET amp.
I must to be very honest: I am one step behind your explanations; my electronic knowledge is very limited, so with every answer opens a new path to research for me.
regards
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