I agree with the three suggestions I've seen so far. The Coax is
undoubtedly Very lossy after 30 years, and is likely to have many pinholes
and "mini-shorts" (if I can invent a term) that will greatly degrade your
system, to say the least. I can only shudder at what the condition of the
dialectrics must be.
Disassembly and cleaning of the antenna joints is an outstanding idea, for
the reasons already given. Likewise the coax connectors, which of course
you will be replacing (half of anyway) when you change the coax.
I agree that receive loss sounds suspiciously like a bad T/R relay, a
condition I have experienced several times in my past. You might be able to
clean the contacts, if you have the proper cleaners and can remove the cover
non-destructively. Otherwise, replacement is called for.
Between all three things, I would bet that your system performance is
degraded by a very large amount, perhaps more than you may expect. I'd
think you would be very pleasantly surprised after doing these things.
73 de Gary, AA2IZ
----- Original Message -----
From: <ac5aa@juno.com>
To: <tentec@contesting.com>
Sent: Wednesday, May 25, 2005 9:25 AM
Subject: Re: [TenTec] omini 6+ & antenna question
>
> While I agree with Bill that you should replace your coax, the symptoms
you describe, especially where you lose RX sensitivity after transmitting,
but that tapping the key to cycle the T/R relay will often restore
sensitivity, sounds suspiciously like the T/R relay is shot. I'd start
there while you're replacing the coax!
>
> 73, Duane
>
> Duane Calvin, AC5AA
> Austin, Texas
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
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