I would say that your problem are the traps, because they only come into
play on 20 and 15,
I think that you are going to have to take the antenna down off the tower
and clean up the traps.
I'm in the process of re building my 30 year old TH3 Mk3 at the moment and
hope to have
it back in service early this summer,
Best of luck, Mike EI2DJ / G4GXN
On Wed, Mar 16, 2011 at 4:50 PM, Diane & Edward Swynar <email@example.com
> Hi Guys,
> This has nothing particularly to do with TOWERS, per se, but I'm wondering
> if anyone reading this might have an idea, or two (it'll require CLIMBING
> the tower here in any event, I'm sure!).
> Specifically, I have a Hygain TH3 - Mark III 3-element tri-band yagi at 48'
> here that has basically been idle, as I concentrated my efforts on the low
> bands for some 4 years now. Anyway, I re-discovered 10-meters with the
> inordinately high sunspot count of late, and pressed the yagi into service
> there with stellar results.
> Inspired, I next tried the antenna on both 20- and 15-meters, but was
> shocked to see the SWR inordinately high right across each band...
> Obviously something up there has gone awry in the preceding years---but why
> is it still A-OK on 10-meters...?
> Thanks in advance, with my vy
> ~73~ de Eddy VE3CUI - VE3XZ
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