Re: Variable power control
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Just a tought...
what happens if we reduce the voltage to the electret mic with a simple pot? distortion? variable power?
On Mon, Jan 1, 2018 at 4:09 PM, Clark Martin <kk6isp@...>
That’s easy enough to fix. You put a power control pot (2 terminals only) between the +5V and the bias pot(s). You set the power control to maximum and adjust each bias pot(s) for for the proper current draw. Now you can turn down the bias / power, as you please. But you can’t turn it up past “full”.
Arv, a) Happy New Year. b) Aside from using an attenuator, drive is controlled by
the preset RV1. This could be replaced by a variable pot., perhaps on the back panel.
However I think it was Farhan who pointed out a long time ago that the only problem
with this is the temptation to keep turning it up! 73, John G0UCP
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