[TenTec] RFI question for Orion and other TT rigs

Bill Rowlett kc4atu at hotmail.com
Tue Jun 28 11:07:01 EDT 2005


TT has one too in a kit.

Bill  kc4atu

>From: "Scott Harwood" <scotth at hsc.edu>
>Reply-To: scotth at hsc.edu,Discussion of Ten-Tec Equipment 
><tentec at contesting.com>
>To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>Subject: Re: [TenTec] RFI question for Orion and other TT rigs
>Date: Tue, 28 Jun 2005 10:48:07 -0400
>
>MFJ makes a counterpoise tuner.  I use it while in Florida in the winter 
>from a 3rd story condo.  I had TVI & telephone problems until I got one.  
>Works great with 30 ft. wire around baseboard.  No more problems.
>Scott K4VWK
>---------- Original Message ----------------------------------
>From: "GARY HUBER" <glhuber at msn.com>
>Reply-To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>Date:  Tue, 28 Jun 2005 09:38:58 -0500
>
> >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 at alltel.net>
> >  To: Discussion of Ten-Tec Equipment<mailto:tentec at 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 at alltel.net<mailto:aldermant at alltel.net>>
> >  >   To: 'Discussion of Ten-Tec 
>Equipment'<mailto:tentec at contesting.com<mailto:tentec at 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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> >  
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>
>
>
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