[TenTec] SOLVED - 706 Microphone VOX Switch Problem

[John Huffman]

Problem solved.  It wasn't RF since I wasn't transmitting while pushing the 
buttons (XMIT DISABLED via N4PY).  But, you did get me on the right track with 
grounding.

Long story short, the 706 Ten Tec microphone does not have the shell of the plug 
grounded.  My extension cords did have a grounded shield which grounded the plug 
shells on each end.  But with no shell ground on the mike, it was for naught.

Grounding the braid to the shell did the trick.

Thanks and 73 de NA8M
John

----- Original Message ----- 
From: "K. Indart" <kitdart at ntelos.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, March 19, 2006 8:28 AM
Subject: Re: [TenTec] 706 Microphone VOX Switch Problem


> 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
>