Rich, Please re-check that part number- the number 19D436272G1 applies to some sheet-metal parts, and not to any power supply, according to my GE microfiche file. Regardless of the part number, your symptoms are typical of a power supply in which one of the rectifier diodes has opened. You can check this by using an oscilloscope to view the ripple on the output, when the PA is transmitting. If all diodes are conducting, the ripple will be 120 Hz; if not, the ripple will be 60 Hz.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of enjoyacold807 Sent: Monday, August 18, 2008 6:58 PM To: [email protected] Subject: [Repeater-Builder] GE MASTR II PWR SUPPLY - What dies first? 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 tsunami 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 poring over service manuals for this (potential) boat anchor we wanted to skip to the chase and leverage 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] <mailto:Goodyear_Amateur_Radio_Club%40yahoogroups.com> or look up my email on qrz and respond directly.. 73's de Rich AF1K...
