> >What is the SWR looking into the duplexer?
>
> Did not check that. What should it be? I assume 10% or
> less reflected.
Ideally it should be not much higher than the antenna SWR,
but even if SWR into the duplexer is low, duplexers can
look reactive and cause some PAs to act up. And even a
*slightly* mistuned duplxer can look really ugly.
> But... what if the duplexer does have the -2.8 loss, then
> I guess retuning is in order?
If the duplexer really has 2.8 dB loss, I would try retuning
it. It shouldn't be that high.
> I read on the repeater builder site that some people tune
> with the TX power at the site. That seems a bit risky to
> me and it would drastically change the notches.
That's a controversial subject. I don't feel comfortable
tuning under power, but some do. I could never convince
myself there wouldn't be damaging arcing at the finger
stock.
Paul
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