[TenTec] Electret Microphone "plopping/clicking"

[Peter Frenning [OZ1PIF]]

I have recently adapted various electret head sets and microphones to my 
Orion 2, running 2.041XT, and have received report on a "Plopping" or 
"Clicking" sound emanating when PTT is activated, it's fairly regular 
making the sound 3-5 times per second. It's clearly audible on Monitor, 
and also when monitoring the signal on another receiver.
I bias the electret element from the voltage present on Pin2 through a 
2.2KOhm resistor, and it does the "plopping" regardless of whether I put 
in a blocking capacitor or not.
It does NOT occur when using my 708 Dynamic desk microphone.

Does anyone have an idea what can be causing this (HW/SW), and of a cure?


-- 
Vy 73 de OZ1PIF/5Q2M, Peter

** CW: Who? Me? You must be joking!! **
email: peter(no-spam-filler)@frenning.dk
http://www.frenning.dk/oz1pif.htm
Ph. +45 4619 3239
Snailmail:
Peter Frenning
Ternevej 23
DK-4130 Viby Sj.
Denmark
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