[TenTec] Omni VII: RF in TX Audio

[alan geller]

Dave,
If you want a tool to understand the "why" of it, Jim Brown's tutorial on Ferrites, Baluns and Audio in http://audiosystemsgroup.com is a terrific practical guide. I would just buy a handful of snap-on ferrites and put them on any signal or power cable in the "new" setup and control the RF paths and then use whatever tools/skills you have to figure out the subtlties. 
I have one of TenTec's 254 tuners on my OMNI6 and every time I made an  antenna and coax path change, something in that unit would smoke and I got a chance to buy/or cobble new parts. I'm a slow learner.

Cheers,

alan/K6ADG




________________________________
From: David and Dianne on Comcast <dhhdeh at comcast.net>
To: Ten Tec Reflector <tentec at contesting.com>
Sent: Sat, October 24, 2009 11:20:02 AM
Subject: [TenTec] Omni VII:  RF in TX Audio

Hi All,

This past week I added a 'new to me' Omni VII to the shack along with 
the #715 speech processor.  The rig has been excellent so far expect for 
one glitch that is avoiding any remedy I try.

I am using a TT 705 microphone,  When I feed it into the Omni VII via a 
TT #710 4 to 8 pin mic adapter I get stellar audio reports. But when I 
feed it through the #715 to the rig I get reports of significant RF on 
my TX audio whether or not the #715 processor is in-line/active or bypassed.

I have used the 715 on my Omni V.9 using the same mic with no problem.

I have also noticed that the Omni VII audio/mic gain seems really 'hot'  
(i.e. excess gain) requiring me to run it at no more than 10% open. Is 
this normal?

Anyone else have a similar situation and/or a possible solution? Please 
reply off list.

Thanks to all in advance.

BTW this is a really excellent receiver with a nice features set

73 de N1LQ-Dave




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