What are you actually trying to achieve?
There's lots of pitfalls in my suggested circuit. It isn't a
tried and tested project, and will almost certainly require
revision and troubleshooting. I wouldn't recommend it for a
beginner.
Looking at it now it seems overcomplex. If you add a third mic
each side it gets even more complex, how would you balance them?
I'm already not that happy with my arrangement of balance pots (R2
R25) and level pots (R3 R15).
If you only want to amplify one side of the accordion then you
could use essentially half the circuit, and use a single opamp
instead of a dual - so simpler.
A version which didn't stack the power supplies would also be
simpler to get right, at the expense of more current draw.
On 12/04/2025 20:19, jc.selles via
groups.io wrote:
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Hello
Yes I meant this circuit. I a near future I will try to built
it more or less as you sudgested it : a single opamp but with
three capsules for each sides.?
?
What do you mean by a simpler circuit?
?
I would like to have a way to control the volume on this
preamp but I am starting to feel that's too complex for me.
?
?
Anyway thanks a lot. This is a beautiful collaborative
thread.?
