On Fri, 01 Dec 2006 02:33:23 +0000, Ed saiyd:


Looking for specs on this amplifier:
http://img100.imageshack.us/my.php?image=pa2modhi7.jpg
http://img484.imageshack.us/my.php?image=pa1modzp8.jpg

Don't know much at this stage, apart from 4Watts drive (@ 430-480MHz)=
approx. 150W output, draws well over 30A from my poor struggling power
supply. I'm not game to up the drive any further until I know the
specs!

Basically any specs or any info at all would be great, thanks in
advance.

Been a few years, but looks like a PA out of either a MSR2000 or
MSF5000 repeater. In any case, I'd say you were overdriving it with 4
watts, as indicated by the 150 watts out. Its probably a 100 or 110 watt
amplifer. I believe that most Motorola exciters for such amplifiers
put out either 1 watt or possibly 2 watts.

G'day Ed,

The general consensus is that it did indeed come from an MSF5000, I
started a thread over at batlabs just prior to posting to these groups,
which has paid off somewhat
(see: http://batboard.batlabs.com/viewtopi...&unwatch=topic )
but now of course there is also some conflicting info in the replies...
info on Motorola gear can be hard to find!

I'll play it safe and keep it below 3W until I get definite confirmation
of the specs being different. Cheers

The general consensus is that it did indeed come from an MSF5000, I
started a thread over at batlabs just prior to posting to these
groups, which has paid off somewhat
(see: http://batboard.batlabs.com/viewtopi...&unwatch=topic
) but now of course there is also some conflicting info in the
replies... info on Motorola gear can be hard to find!

I'll play it safe and keep it below 3W until I get definite
confirmation of the specs being different. Cheers


Good idea. I worked on Motorola, etc, for the past 35 years, up to
and including MSF5000 UHF like you have. Best I can recollect, never had
an PA that took more than 1 or 2 watts drive..... I could be wrong,
maybe.... its been a couple years.



Ed