Thanks to all that replied.
After mocking up the amps for test with no circulator, separate 2
watt exciter @ 444.400, and the control line to 12 volts, I
discovered that I have one amp that puts out 60 watts full bore,
(starts at 78 and drops to 60), one that puts out 120 plus, (this
unit has been repaired and the devices may or may not be non-OE),
another that puts out about 120 watts but is burning the balancing
resistor between the last two rf devices, and two that do absoulutely
nothing. During my bench test I only keyed the amps for 3-4 seconds.
I went back and looked over my original setup and discovered that one
of the dummy loads that I used on the RLB is junk, if you tighten the
connector, the thing goes open. The return loss bridge can't give
good info without a proper load on the UUT. Sooooo.... the Dummy is
in the circular file ready for a trip to the landfill on Tuesday.
Once I retuned the circulator, the good amps run in the repeater
chassis as one would expect them to.
I also noticed that one of the high output amps seems to have an
issue when feeding the circulator. The output through the circ. (loss
thru the circ is about 1.2 db) starts at 60 watts and then jumps to
75 or so and the spectrum analyzer light up like a christmas tree.
Turn the power control all the way up, it's OK, turn it down some,
it's OK. I touched up the circ in the chassis and no change.
Not really ready to take that one to the hill!
Any comments on the funky amps would be appreciated.
What have I learned? Don't always have faith in your test equipment.
If it seems to strange, check your stuff, it may be lying to you!
I will put this thing back together and set up the PA and re-check
things and post the results if I find anything unusual.
Thanks to all. John
P.S. My main repeater is a Micor Station. Since I never have to fool
with it, I have forgotten nearly all that I have learned about these
things. I'm a GE guy at heart. ; - )
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