I'm on my third attempt at the Return of Zen amplifier, I think I found a flaw in my original circuit board.
However, the picture doesn't make it clear. If you look at the schematic, it says one of two things:
Connect R11 from -out to ground.
Connect R11 from -out to the input capacitors.
The latter makes more sense, and is the way I did it last time. However, since I failed on my first attempt, I'm doubting everything this time.
I sent an e-mail to Nelson Pass. So, if he responds, I'll have a difinitive answer. So, first, what do you people think the answer will be? I would really like to etch the board today.
Thanks,
pixie
However, the picture doesn't make it clear. If you look at the schematic, it says one of two things:
Connect R11 from -out to ground.
Connect R11 from -out to the input capacitors.
The latter makes more sense, and is the way I did it last time. However, since I failed on my first attempt, I'm doubting everything this time.
I sent an e-mail to Nelson Pass. So, if he responds, I'll have a difinitive answer. So, first, what do you people think the answer will be? I would really like to etch the board today.
Thanks,
pixie
I assume you refer to the "Zen revisited". That R11 is the feedback resistor and is connecting from the output back to the input of the MOSFET, not to ground.
Ok, thanks.
I etched a new board with a place for a jumper. So, I'm set. I didn't connect the jumper.
All I have to do now is put the thing together and I'm ready to test it again.
I built a function generator. And I have an oscilloscope. So, I'm going to be able to test it properly this time.
Later,
pixie
I etched a new board with a place for a jumper. So, I'm set. I didn't connect the jumper.
All I have to do now is put the thing together and I'm ready to test it again.
I built a function generator. And I have an oscilloscope. So, I'm going to be able to test it properly this time.
Later,
pixie
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