Aaron,
The others are correct - you should not have had to add a "T" to connect the two sections together - they should have been constructed in a way that the two halves of the harness connect together without any adapter. (These harnesses are constructed with cabling of different impedance - it is NOT your typical 50 ohm RG-8, so you can't just "T" it together.) Your feedline would then connect to the end of the harness - ostensibly at the bottom of the antenna...
Somewhere on the antenna assembly there SHOULD be a tag with a manufacturer name and model number. It may also specify the freq range of the antenna. These would be VERY helpful for those of us who are trying to diagnose the problem.
Next - if you had water in the coax, CHANGE IT OUT! It will only corrode later on and you'll end up with MAJOR problems. Save yourself the headaches and change it out now.
Has someone verified that the duplexer you are using is tuned to YOUR operating frequencies? It may have been from another system that operated on a "close" frequency, but duplexer tuning has to be spot-on. Check your output into a dummy load - before the duplexer, then after. That way you can gauge the amount of insertion loss from the duplexer itself. It could very well be that you are losing that much in the duplexer - as another has suggested, because of the very close frequency offsets used for amateur repeaters, this increases the insertion losses at the duplexer.
With more information, someone here should certainly be able to help you correct your problems.
Mark - N9WYS
-----Original Message-----
From: [email protected] On Behalf Of atms169
Sent: Tuesday, May 30, 2006 2:54 PM
To: [email protected]
Subject: [Repeater-Builder] Re: Double the gain or double the power?
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???
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.
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