More MSR-2000 PA war stories One other cute little MSR PA Section tidbit I didn't think to mention.
Depending on which PA version and Model you have there... If the PA was ever operated into a reflective load without proper circulator - isolator type protection... then you can "assume" the PA Harmonic filter probably got hot. In some cases hot enough that parts at high current points desolder themselves quite easily. So... I make it a point to check every PA Harmonic Filter Section before placing a refurbished repeater back into service. Many times I've found the Harmonic Filter Caps and parts just kind of floating loose inside the shield/cover. ... and found the power output to be semi normal (the expected value). In the UHF 110 watt pa's there are two versions.. the early version was a real problem child, while the "B" version PA's with the second series harmonic filter networks were much more stable and sane. If owners/ops would read the manual and make sure the power controls (level, voltage and current limit) are properly set you can sometimes prevent harmonic filter damage. Back in days of old... when we set up new MSR Repeaters... the first thing we did was to reduce the output power by at least 1/3. life goes on... cheers, s.
