----- Original Message -----
Sent: Friday, October 15, 2004 10:27
AM
Subject: [Repeater-Builder] Duplexer
Question
Hey all, quick question about a 2 meter repeater I
just put up for testing. I'm putting out about 80 watts from the PA into the
duplexer, but only getting about 55 watts out of the antenna port on the
duplexer. This seems kind of high to me. The specs of the duplexer
are:
Power handling - 150 watts (Im running half
that)
Min seperation - 1.5 Mhz (I'm running
2.55Mhz offset)
Isolation at min sep - 90db
(the plot I was sent with the duplexer shows better than 105db on both sides
because of the wider spread)
TX and RX loss at my seperation - approx
1.2db
I'm also having some desense when the PA gets
keyed, but I'm not sure if it�s the duplexer or a cabling issue yet. Have to
do some further research. The duplexer came tuned from the factory on my
freqs, and it�s a six cavity, BPBR type from Fiplex so I cant see it being a
duplexer issue. Any input is greatly appreciated. TIA to all.
Kevin
K2KMB
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