atms169 wrote:
> Alright for all those that think I'm an idiot, it's true.... I am!
>
> I went back up to the repeater site and did some testing. I did find
> that there was some water in the coax. I blew it out and re-sealed
> the connectors. Now I am back up to 22-25 watts with a 1.1 match on
> the 4 antenna's. So I am still losing 20 watts somewhere???
AH HAH!!! heh, that'll do it every time!
> I tried the vertical full wave antenna I had laying at the site and it
> also gives me 25 watts out. So I am losing almost half through the
> duplexers. This is strange to me, mind you I am losing about 3db in
> the duplexers so that is half.
For a 2M duplexer, some really are that high loss. 2.2-2.5dB is common.
One of the problems with 2M is the close (.6 Mhz) in/out spacing. To get
the isolation needed, you wind up with more insertion loss in the
duplexer (long story short). On higher bands, you can get the required
isolation much easier, since there is natural isolation with wider
frequency spreads.
Did that make sense???
--
Jim Barbour
WD8CHL
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