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On Sat, 1/19/19, Wayne Leake <wayneleake@...> wrote:

Subject: Re: [BITX20] Electret mic amp with AGC from Adafruit
To: [email protected]
Date: Saturday, January 19, 2019, 3:26 AM

?I'd like to try
one of those AGC Mike preamps.
?I have a
number of G.E. commercial mikes, some of which have a preamp
built in.
?I don't think they are
anything more than a 1 transistor preamp.
I
need to find some of my G.E. service manuals and see what
voltage is provided to the mikes.??Or set up one or two
of the radios and check the voltages.
?One
model called for an electret mike, but one I have wired for
it has the preamp in it.?I opened several to
check.?I also want to use an
8 pin plug and socket, same as is used on some Kenwoods, and
a couple of other rigs.
?Don't know if
the Heil gold line is just dynamic or what. Just that it
worked on an HF Kenwood, and also on an 1 1/4 meter rig
?It has two elements, switchable.?Other way would be to
build a compressor setup I was looking at. Pretty sure it
has AGC as well as compresion, which can be bypassed with a
switch.?YMMV?Wayne WA2YNE?I'm not really all
there. I'm over here.