Hi Sylvan
Before you do anything else I would:
a: drop the top guys (and any other dipoles/wires that may be close) and
bring them along the tower (by disconnecting them at the ground, and just
walking them in) , assuming this can be done safely on a calm day. Then
check the SWR.
b: sub a dummy load for the yagi.
The results of this will determine the next step(s). If you're getting the
spring storm we just got, I don't imagine you'll be doing much in the next
day or so....
Good luck
Don VE6JY
----- Original Message -----
From: "Sylvan Katz" <jskatz@sk.sympatico.ca>
To: <K7LXC@aol.com>; <towertalk@contesting.com>
Sent: Tuesday, April 16, 2002 17:32
Subject: Re: [Towertalk] Mixing EHS and Phillystran + specs
> Steve
>
> Thanks for the response.
>
> > Is the C31 on top of the tower and the above the guys? What does the
> swr
> > do when you key the xmtr and rotate the antenna? If it changes, then the
> > culprit is typically the guys.
>
> Yes - the C31 is about 1.5 ft above the top of the tower. The guys, four
of
> them, are attached directly to the metal plate at the top of the tower. I
> have an insulator in each guy about 14 ft from the top of the tower. The
> problem I am experiencing is not being able to get the SWR on 20 and 15
down
> within spec. I have exchanged a number of emails with Natan at F-12 and he
> figures the problem is related to the fact that the 14 ft guys sections
> electrically connected to each other via the tower plate (about 1.5 ft
> across) is detuning the C31 and causing the swr problems. Oh and I do not
> see any swr change as I rotate the antenna.
>
> Any advice before I endeavor to make a change is really appreciated.
>
> .. sylvan
>
> Ô¿Ô¬
> ----------------
> Sylvan Katz, VE5ZX
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