--- In [email protected], "maxjam_99" <[EMAIL PROTECTED]>
wrote:
>
>
> I have a vhf mitrek that has been split for repeater operation. It
> has work flawlessly until now. When the TX is unkeyed the
transmitter
> will stay keyed for approx 10 seconds. During this time it
generates
> a wide signal +-1Mhz centered on the TX frequency with full power
out.
> Once 10 seconds or so it will unkey and cease tx'ing. If you key
the
> TX during the time it is generating this wide signal then it will
TX a
> proper clean signal, unkey and start over.
>
> Any thoughts?
>
> Thanks...
One quick and interesting thing to do in this case Sean is to put a
good VSWR bridge on the output of the amp (not the duplexer) and
watch the VSWR when the amp acts up. If you are feeding a tuned
antenna or duplexer port with the output of the amp, and your amp is
throwing out many spurs, the VSWR will go way out of whack when the
spurs fly. They can be on darn near any frequency other than the one
you intend to be on, causing a bunch of reflected power.
This is just a quick way to see just how bad things are if you don't
have all of your gear with you.
Read the reply from Eric. It is right on the money. I have been where
you are. I don't want to go there again!
Best of luck. John
>
> Sean / N�PBA
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