"Paul P" wrote in
message ...

Still looking for a Tripp Lite PR-25 (or similar model) DC power supply
schematic to repair the club's repeater power supply. If any one has one
I'd appreciate a copy, email or otherwise.

I called Tripp Lite just now. According to Technical Support their
PRESIDENT has recently mandated that they would NOT send any more
schematics out.
However, I could trade the supply in for a new one at about 85 bucks.

Thanks and merry Christmas,
Paul.

paul at ppinyot dot com


Paul -

IF it uses the standard LM723 IC regulator and pass transistors (2N3055,
2N3771, or 2N3772) you do not need a schematic per say - to repair. Check
the pass transistors with you trusty VOM/DVM .. can replace 723 !!

Here is the DIY web site for linear supplies
http://www.kbt-dc-supplies.com/index.php

Astron schematics (everyone else copies them)
http://www.repeater-builder.com/astr...ron-index.html

Regulated Power Supply construction (how a linear supply works)
http://www.seits.org/features/pwrsup.htm

w9gb