If it's a regular event in a light wind, I'd go after
the antenna first. You'd be able to test for the antenna
problem without the transmitter on.
The reactance back from the antenna might also contribute
toward problems in a duplexer.
I've got one really cranky UHF duplexer that's pretty much
unusable in a specific section of the band. Any reflected
power from even a good antenna caused the attached repeater
system to growl with intermod about 40% of the time.
As you rotate the tune plunger through it's range, you
can feel and hear the finger stock hit the pitted section.
I got the duplexer from FLorida in one of those great
Ebay Deals we all hear about... I assume the duplexer
has seen more than one nearby high energy discharge in
it's day.
cheers,
skipp
> Paul Kelley <[EMAIL PROTECTED]> wrote:
> In my case, what worries me is the problem seems to be worse
> in a gentle breeze than a strong wind. About half the time
> shaking the antenna seems to produce the problem and the
> other half it doesn't. It is nearly always breezy at the
> site which leads to a certain ambiguity on that test. I
> guess I will see what happens when I swap out the antenna.
>
> The original post did say it worked OK on split antennas,
> but also mentioned it worked OK into a dummy load (I assume
> he meant connected at the antenna port of the duplexer, but
> I don't think that was specifically stated).
>
> Paul N1BUG
>
>
> On Tuesday 23 August 2005 02:28 pm, skipp025 wrote:
> > I've had the same problem caused by an old station
> > master. We swapped it out and the new antenna fixed the
> > problem
> >
> > I thought the original post mentioned the unit worked
> > fine on the same antenna split... which is not really a
> > true test... but it leads me toward the plunger arcing
> > test/tune first.
> >
> > Testing the antenna with strong wind moving it around
> > quite a bit would be the best first choice for checking
> > the station master.
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