60 cyc hum! --- On Sun, 6/20/10, Leroy A. M. Baptiste <[email protected]> wrote:
From: Leroy A. M. Baptiste <[email protected]> Subject: RE: [Repeater-Builder] Astron RS50 Power Supply To: [email protected] Date: Sunday, June 20, 2010, 6:27 PM I must have missed it, but what is the deal of not connecting the negative side of an Astron Supply to case? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mike Morris Sent: Sunday, June 20, 2010 6:24 PM To: [email protected] Subject: Re: [Repeater-Builder] Astron RS50 Power Supply At 11:22 AM 06/20/10, you wrote: >Hi Guys, >I am trying to download a schematic on this site for the RS50M Power >Supply and keep getting a 404 Error on each attempt on all the >supplies. Any ideas? Did you use the email link on the 404 page to tell the guys at repeater-builder? I just checked the RS50 links and they all seem to work... Let me know which link doesn't work and I'll fix it. You might want to read the repair and modification notes on the "Introductory Information" page. At the least you should add the missing compensation cap and the missing lock washers. Make sure the negative side of the supply is NOT connected to the case. Eric WB6FLY posted a informative note about that a while back. It's reproduced on the "Introductory Information" page. According to the schematic the main diodes in the RS-50 is the 1N1184A. International Rectifier calls it a 40 amp diode. What brand is in your unit? I rebuilt an RS50 a couple of years ago and used a pair of the 1N2129A (60 amp diode). If I were to do it over again I'd use a 100a diode like the 1N3288 that I use in the RS-70. Mike WA6ILQ
