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>
To: 'Discussion of Ten-Tec Equipment'<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
-----Original Message-----
From: tentec-bounces@contesting.com<mailto:tentec-bounces@contesting.com>
[mailto:tentec-bounces@contesting.com] On Behalf Of
rsrocket1@comcast.net<mailto:rsrocket1@comcast.net>
Sent: Friday, June 24, 2005 11:01 AM
To: tentec@contesting.com<mailto:tentec@contesting.com>
Subject: [TenTec] RFI question for Orion and other TT rigs
Dear List,
This is in no way a flame on anything, but I would like to know which
Ten-Tec rigs are prone to a "dirty" RF shack. I've heard the Jupiter is
prone to having problems in a shack with stray RF in it. I would like
to know if the Orion has the same problem or if any of the older TT rigs
do. I know for a fact that the Century 21 does not because I used it
without problems.
I know that cleaning up the RF is the best solution, but I am always
experimenting with antennas, feed lines, baluns, etc. and I have never
had operational problems with the Icom, Yaesu, Kenwood or Alinco radios
that I've used. I've been "tickled" a number of times when touching
knobs while transmitting, but it seems to be as much dependent on the
radio as it is with the antenna or feeding system.
By the way, I just picked up my first Yaesu HF rig, an FT-101E basket
case. What a joy it is to work on. Separate removable PC boards, lots
of easily reached adjustment points, and an excellent user and service
manual seemingly written for a competent ham, not a service technician
to understand. A couple of evenings and it was back to good working
order. It's nice to have an appliance to "turn on and talk", but it's
also a lot of fun to "work" a radio while tuning across the bands.
73
Roy
AD6ZU
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