[Amps] Alpha 87A Mic Click Grid Current Spike

[Paul Christensen]

> Just noticed that when I PTT on my mic that my Alpha 87A Grid current 
> always
> shows a momentary spike of about 70ma.

Start by taking the transceiver RF out of the equation.  Remove only the 
coaxial cable between the 87A and transceiver.and key the amp's PTT line 
with the transceiver.  Even better, bypass the transceiver altogether and 
key the amp's PTT line with a dry contact closure.  If the grid current no 
longer spikes, then the transceiver may be producing a short burst of high 
power even with negligible drive.

Paul, W9AC