Dave,
There is no pat answer to your question, because the optimum length of
the jumpers depends not just upon the operating frequencies or the
design of the cavities, but also upon the physical length of the loops
or probes within the cavities. The optimum jumper lengths are not the
same for loops as for probes. Therefore, duplexers of identical design,
but from different manufacturers, may require different jumper lengths
to achieve optimum performance. It's always best to ask the
manufacturer what lengths are correct for the given frequencies.
73, Eric Lemmon WB6FLY
dave_g7uzn wrote:
>
> Hi Group, I know this question has probably been asked before, but should the
> patch leads connecting cavity filters be 1/4 or 1/2 wave in length please? We
> are having problems with a new 2M repeater just south east of London and any
> help would be much appreciated.
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