Repeater BuilderThese supplies are Ferro resonant and use an AC capacitor to
resonate with a winding on the transformer. Check the capacitor first, it
should be a 5 or 7 uF AC model rated at 660 volts. They are easy to find as W.
W. Grainger carries them or an equivalent model. If the winding is open you
are pretty much into your case #1.
Some models use a relay to switch in the capacitor when the PTT is activated.
Check the relay contacts and insure it is being energized during transmit.
These models have a small PC board with a few components to activate the relay
coil.
Normally these guys are pretty reliable and give minimal trouble.
Jack
K6YC
GE MASTR II PWR SUPPLY - What dies first?
Posted by: "enjoyacold807" [EMAIL PROTECTED] enjoyacold807
Tue Aug 19, 2008 2:32 am (PDT)
Your basic GE Mastr II rack mount pwr supply (ref PL19D436272G1 Rev
A) was part of club WA8UXP's 2m GE MastrII (base) repeater (146.985
Mhz) until it started acting up (a few years ago). Basically, the no
load voltage looked ok. But, once the 100w PA kicked in the voltage
swings made a sunami look like a placid lake. Ouch!! It was then
replaced by Astron RS-35A. Now, the club has three (3) choices for
the old fella being: boat anchor/scrap, try to fix, or hamfest sale
as is.
But option 2, hmmm, if economically repairable, maybe we could put it
back where it belongs (w/ the repeater) and re-deploy the Astron.
Ah, life, so many choices, so little time.
BTW - Thanks for reading this far....
So, rather than spend countless hours finding & then pouring over
service manuals for this (potenital) boat anchor we wanted to skip to
the chase and leverge off the experience of others. If you've "been
there, done that, and are willing to pass along words of wisdom" on
this bear then we'd love to hear from you. What two or three things
would you look for to fix in one of these power supplies?
We promise, no response will go unread (honestly)...!
OK to reply to this Yahoo group, or, if you want to take off line
then also OK to respond to Yahoo Group
[EMAIL PROTECTED] or look up my email on
qrz and respond directly..
73's de Rich AF1K...
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