"Knock on wood," after I rebuilt my comet diplexers with RG142 (and
393 on the other one), they hold up to 160 watts continous output from
my 440 machine (the 2 meter side is used as receive only). I have one
very long winded net every week, and a couple shorter ones on the
system.
James
Adam T. Cately wrote:
At 07:17 AM 2/1/05 -0800, you wrote:
At 03:13 PM 2/1/2005 -0000, you wrote:
Does anyone have, or know where I can get plans to homebrew a 144/440
MHz crossband coupler (aka "diplexer") ?? I would like to find
something with wideband characteristics (ie, low pass, high pass)
such as some of the diamond or comet models, but needs to be able to
handle 100 watts FM continuously from each band, without excessive
loss and without duplex noise, or little capacitors smoking. Any
suggestions, other than the Telewave models that cost over $300?
<---Comet and Diamond make several models that will work just fine. And
they're definately cheaper!
I've tried running ham diplexers on 2m/440 repeater setups, and if
you keep the TX power on each band low, you MIGHT be OK - they aren't
designed for 100w CONTINUOUS TX, and they'll melt after some long-winded
nets. As it has been stated here plenty of times, you get what you pay
for. Use the commercial version - I have - it's well worth the bucks.
- Adam -
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