[TenTec] 706 Microphone VOX Switch Problem

[K. Indart]

Is your problem on all  bands?; seems that RF is being picked up by the
extended mic cable.  Check your RF grounding and try placing some ferrites
at the plug end of mic cable.  Try rolling up the cable at the plug end; if
problem goes away, it looks like RF problem.  Try  dropping power by 50 to
75% and check again.  These tests will help you determine what the problem
is.
73, Ken  WA4RPH

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]On
Behalf Of John Huffman
Sent: Saturday, March 18, 2006 4:10 PM
To: Discussion of Ten-Tec Equipment
Subject: [TenTec] 706 Microphone VOX Switch Problem

My new (January) 706 microphone doesn't work the way I'd like.  I have it
hooked
to my Pegasus.

The VOX button works fine when the microphone is connected directly to the
radio.  But, I keep the Pegasus away from the oprating desk.

With a 4 foot or a 6 foot extension the VOX switch doesn't work correctly.
All
other functions - audio and PTT work fine.

Typically, the VOX button turns on when pressed and operates fine, but won't
turn off.  Occasionaly after repeated pressing the VOX button, it will go
off.
Mostly no matter how many thines you press the VOX button on the mike, it
stays
lit.

It will always go off if I disconnect the microphone.  Rarely the VOX switch
won't go on when pressed.

These problems never happen when the mic is directly attrached to the radio.

I suspected a ground problem and I've tried a direct wire between the mic
base
and the radio ground with no help.

I suspected low voltage due to the legnth of the extension.  But, I get 8.1V
at
the mic connector and paralleling a 9V battery (which brought the voltage up
to
8.7v) didn't help.

Suggestions welcomed.

73 de NA8M
John

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