A key missing point here is what kind of transmatch and antenna is being
used? Also, how long is the connection to earth ground, if any, especially
is it a critical quarter wave at the band with problems? Also, the length
of jumper coaxes, mike and power AC and DC cables must be the same for any
meaningful comparison to other rigs to be made. All of the wire is System
when it comes to RF and the possibility of there being a gap in RF bypassing
somewhere. In switching rigs, we often forget we had to add some coax
jumper to reach the other rig, but that will totally change the test
condition if long enough combined with everything else.Another detail is how
high up is the antenna from the station. IE, a second floor station is
going to have more trouble keeping RF in check than one right next to ground
floor outer wall, convenient to earth, rather than having to run a long
conductor, which sits in the antenna fields.
Very interesting thread.
73, Stuart K5KVH
----- Original Message -----
From: "George, W5YR" <w5yr@att.net>
To: <pywacker@fuse.net>
Cc: <w9ow@yahoo.com>; "TenTec Mailing List" <tentec@contesting.com>
Sent: Thursday, April 19, 2001 1:28 PM
Subject: Re: [TenTec] I'm getting reports of RF in my Pegasus ssb audio.
>
> I hear this comment frequently on the bands and am beginning to wonder
just
> what symptom(s) are present that lead to the diagnosis of "RF in the
> audio?"
>
> How is that conclusion reached based upon what the listener is hearing?
>
> Not trying to pull any chains, but I am trying to understand these
> increasing reports and diagnoses.
>
> 72/73, George W5YR - the Yellow Rose of Texas QRP-L 1373 NETXQRP 6
> Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
> Amateur Radio W5YR, in the 55th year and it just keeps getting better!
> Icom IC-756PRO #02121 Kachina #91900556 IC-765 #02437
>
> > I'm getting reports of RF in my Pegasus ssb audio.
> > The condition seems to occur only when I have an
> > antenna tuner in line. I tried a couple of other HF
> > rigs (a TS 830 and a TS 430) with the same tuner -
> > antenna combination and got clean reports from the
> > same operators. I think I have a good station ground.
> > I'm using the stock TT mike on the peg. Any thoughts?
> > John, W9OW
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/tentec
> Submissions: tentec@contesting.com
> Administrative requests: tentec-REQUEST@contesting.com
> Problems: owner-tentec@contesting.com
>
>
--
FAQ on WWW: http://www.contesting.com/FAQ/tentec
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
|