Mike,
Notice that U2 also has an output that is involved in PTT and VOX
detection via U4 and the COMP OUT signal.
The signal at the output side of C31 is driving an impedance of about 8k
ohms. I don't know what your Symetrix mic amplifier is capable of driving.
73,
Don W3FPR
On 2/2/2019 1:55 PM, mustang65 wrote:
Don,
Thanks for the suggestions.
I am thinking of putting the outputsignal from the symetrix 528e microphone
amplifier
to c20 on the ksb2 board so I will bypass U3 and let the signal go direct
to u5 NE602
and that way found out if u2 is bad.
I will come back with the result.
73 Mike sm3xgm
--
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