Alan,
I was wondering about the ferrite materials. My initial thought was to use
31 Material (because Material 31 is designed for HF); however, I further
thought that noise in other frequency ranges (other than HF) may affect
signals within some of the electronics. Should I just stick with 31
Material on HF receivers or do you have additional suggestions?
Stephen AD7TD
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of alan geller
Sent: Saturday, October 24, 2009 3:53 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Omni VII: RF in TX Audio
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@comcast.net>
To: Ten Tec Reflector <tentec@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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