Joe wrote:
> They would strip the gold plating off the leads and
> solder directly to the board. They matched the
> transistors into sets. They also underrated their
> amps for long term longevity. The 900Mhz 250 watt amp
> I worked on had 4 separate amps phased together. One
> amp could burn out and you still easily got 250 watts
> output from the remaining three. I spent some
> training time at the factory years ago and was
> impressed.
>
> Joe
...except that the control board will sense the increased current draw,
send an alarm, and probably shut down the transmitter.
But yes, I've seen those things make well over 400W without breathing
too hard. You just don't want to do it for very long...
Also, since the driver is the same board as the PA's, you can take the
output of the driver direct and get 60-80W, but again, to keep it in
it's normal ratings, 50-55W is where to set it. Actually, you're looking
for current draw-each board should draw no more than about 7.5-8A at 24-26V.
We maintain about 80+ of those-well, they all say Glenayre. Nice boxes!
They just run...100% transmit, 24/7/365.
(they go to 925 Mhz or so REAL well, too!)
(ps-anybody have programming info for the older exciters and RL-900
rx's???)
--
Jim Barbour
WD8CHL
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