On Thu, 22 Dec 2005, Reza PWW wrote:
> Can anybody can advise me for tunning duplexer with minimum tools? For
> example case: I have to change TX-RX frequensi in some place, where I
> only have SWR and some HT and volt meter?
A case of beer, an SWR meter, and a radio. Tune for minimum SWR. The case
of beer is to insure accuracy -- largely because there isn't much. You're
tuning for minimum insertion loss at that point (technically return loss).
Really, you should find a friend with an IFR, communications analyzer, or
spectrum analyzer with a tracking generator. To properly do the job, you
need a dummy load on the unused port. Impedance mismatches can also do a
job on cavity performance.
--
Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
"BIG BROTHER IS WATCHING YOU!"
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