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Re: [TenTec] RFI question for Orion and other TT rigs

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] RFI question for Orion and other TT rigs
From: Robert & Linda McGraw K4TAX <RMcGraw@Blomand.Net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 28 Jun 2005 10:02:08 -0500
List-post: <mailto:tentec@contesting.com>
Yes, I think both Tentec and another company makes a "ground" tuning 
network.  It works, but means that one has a portion of their ground system 
that radiates.

Bob, K4TAX

----- Original Message ----- 
From: "GARY HUBER" <glhuber@msn.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, June 28, 2005 9:38 AM
Subject: Re: [TenTec] RFI question for Orion and other TT rigs

> And I'm not commenting on any issue but the counterpoise to move the RF 
> high voltage point off the equipment in the shack. I have addressed audio, 
> lightning, RF, and protective AC grounding on a professional basis.... 
> went to the commercial schools, did the work, and take care of my own 
> equipment. But I did not see anyone else suggesting the counterpoise 
> solution. By the way I believe there was a commercial "RF ground Tuner" 
> marketed a few years ago..... well maybe more than a few years. It'd do 
> about the same thing which is to take the RF high voltage point off the 
> equipment.
> Gary - AB9M - www.csm-gh.com<http://www.csm-gh.com/>
>  ----- Original Message ----- 
>  From: Tommy<mailto:aldermant@alltel.net>
>  To: Discussion of Ten-Tec Equipment<mailto:tentec@contesting.com>
>  Sent: Tuesday, June 28, 2005 9:10 AM
>  Subject: Re: [TenTec] RFI question for Orion and other TT rigs
>  I'm certainly not disagreeing with Gary...BUT
>  What is THE most important part of your ham radio system? In my
>  opinion, it's your antenna. Why not build your antenna carefully and
>  correctly to begin with, then buy your expensive radio's of your
>  choice. It seems to me that if you follow the simple suggestions in
>  the ARRL Handbook and design your antenna system so it is NOT some
>  odd quarter wave length into your shack, you probably will not ever
>  have to deal with the RFI issue at all? Isn't that why that
>  information is in the Handbook?
>  In my short and active 53 years in the hobby, the ONLY time I ever
>  had an RFI problem was when I had one end of my 80m dipole directly
>  over the top of my house. Any power output greater than 500w and my
>  Hercules amp would just go nuts! The ONLY solution necessary was to
>  move the antenna about 10' further away from the house. I learned
>  that little lesson by experience. Building a ham station that works
>  well requires a little bit of knowledge and a LOT of common sense.
>  BTW, when your having 'strange' problems with a Ten Tec rig, one of
>  the first things that Paul Clinton will ask you is "where is your
>  antenna located?"
>  Tommy - W4BQF
>  At Tuesday 08:45 AM 6/28/2005, GARY HUBER wrote:
>  >One "easy" way to reduce the "RFI in your shack" is the old time
>  >counterpoise. Just a quarter wave length of wire for each band,
>  >connected at the ground post of your transceiver and then strung out
>  >along the baseboard. I've used a multi-conductor cable, like rotor
>  >cable, all conductors soldered together at the termination, but with
>  >each conductor a different quarter wave length and the excess wire
>  >removed. It works even when the ground rod below the desk doesn't.
>  >
>  >73,
>  >
>  >Gary - AB9M
>  >   ----- Original Message -----
>  >   From: Tommy 
> Alderman<mailto:aldermant@alltel.net<mailto:aldermant@alltel.net>>
>  >   To: 'Discussion of Ten-Tec 
> Equipment'<mailto:tentec@contesting.com<mailto:tentec@contesting.com>>
>  >   Sent: Saturday, June 25, 2005 9:52 PM
>  >   Subject: Re: [TenTec] RFI question for Orion and other TT rigs
>  >
>  >
>  >   Roy,
>  >
>  >   One of the best and easiest ways to avoid "RF in your shack" is to 
> make
>  >   sure that one half the length of your antenna plus the total length 
> of
>  >   your feed line is NOT an odd quarter wavelength long. The reason for
>  >   that is if that total is an odd quarter wavelength, you will have a
>  >   maximum voltage field in your shack. The second most easiest thing to
>  >   avoid is do not let the end of any of your antennas terminate 
> directly
>  >   over your shack, as that too, is a high voltage field point.
>  >
>  >   Tommy - W4BQF
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