Carter,
I don't think anyone on the planet can guarantee that a particular radio
will not be susceptible to RFI, unless it is a very old tube radio. Perhaps
the solution is to revert to an older radio.
" No doubt true -- but if I shorten one leg to balance it on one band, will
it still be unbalanced on other bands? Possibly a moot point in any event,
as my climbing days are pretty much over."
I have only ever tried this on an 80/40m coax-fed fan dipole. It was only
the 80m band that was out.
So what I'm saying is, I don't know. There's only one way to find out.
Gud luk!
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carter
Sent: Sunday, June 01, 2014 1:54 AM
To: tentec@contesting.com
Subject: Re: [TenTec] Eagle problem?
Sorry for the delayed response -- been out of the loop for awhile...
On 5/18/2014 12:41 AM, Rick - DJ0IP / NJ0IP wrote:
> Carter,
> Your two feedlines are WAY off from being balanced. Feedlines don't >
have to be perfectly balanced. 10% is good enough. Even 20% probably >
isn't too bad. Yours is 44% out of balance. That needs to be > addressed.
> You asked us to suggest things to try. Yet you reject some of the >
stuff because you can't see why it would make any difference. Man, I > wish
I had a dollar for every time in my life where something that > shouldn't
make any difference turned out to be the culprit.
Sorry -- not arbitrarily rejected. Usually other reasons -- like being too
cheap <grin> to purchase two 4:1 baluns, not practical to move the rig
outside, climbing days are over, etc. Believe me, even though I am not able
to implement all of the suggestions, the comments of you and others ARE
appreciated!
> You have to try stuff. All kinds of stuff. Eventually something > will
cause the problem to dramatically change. When that happens, > that gives
us the next clue as to what the ultimate source of the > problem is. It's a
tough problem. Finding it obviously is not easy.
According to a recent conversation with TT tech support, early vintage Omni
VI's like mine were shipped without ferrite beads on the mic jack leads, and
even though TT graciously sent me the beads, they seemed to think that it
still would not cure the problem. Short of moving the antenna (not
possible), I may be fighting an un-winnable battle. Thus my hinting around
to the group to see if anyone else here had experienced the same problem
with their Omni VI (and had a fix) -- or knew of a relatively bullet-proof
Yaecomwood or newer model TT.
> Yaesu hasn't had white panels for 30+ years, have they? Must be an >
FT-107 out of the late 70's, or early 80's. It would be nice to try > as
new of a radio as you can find - at least out of the mid 90's.
You are correct, it is an FT-107, probably near the vintage of the TR-7
(which worked). A newer radio does not appear to be available; had a local
friend with an Icom 745 -- but when I called him, it turns out he traded it
off and is currently without an HF rig.
As the antenna is not moveable, maybe the non-elegant solution is to see if
anyone knows of a Yaecomwood or newer TT that is NOT susceptible to RFI.
Unfortunately, this does not appear to be a parameter that is covered in the
QST reviews.
73,
Carter K8VT
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