Tom, Do all of the pass transistors feel the same amount of warm? Perhaps one has failed. Is there anyone of your acquaintance who would be competent to help you troubleshoot? I know that can be a challenge. is it feasible to replace all components except the transformer? And I remember recently reading on this list that overall voltage regulation is better with a switching supply than a linear. No answers, just a few thoughts. Eat too much for dinner tomorrow before deciding this weighty issue! Pat, K9JAUAt 08:47 PM 11/25/2015, you wrote: >Hello, everyone. > > > >For those who might be interested, I have an update to share regarding my >Astron power supply woes here at the home QTH. > > > >It turns out that I think I was correct in suspecting that something is >failing in my Astron RS35 supply. > > > >I connected my TS590 to my older Kenwood PS53 supply, and my output power is >now a solid 100 watts according to the TS590's internal swr/watt meter. >This is on the same 40-meter resonant frequency where I tested the RS35 the >other day, and got 75 watts out according to the TS590 meter. My TW1 >reading with the PS53 supply was 90 watts out, compared to 58 watts out with >the RS35. > > > >I then connected my TMV71A to the PS53 power supply, and with a 1.2 to 1 SWR >reading, got an output power reading of 44 watts on 2 meters, and 36 watts >on 440, according to my TW2. > > > >In my view, this indicates that my problem with reduced output power likely >has been related to the RS35. > > > >So, at least in the short term, I'm going to need to re-configure things in >my shack here. > > > >I'm going to run the TS590 setup using the PS53, and my TMV71A, using a >Tentec 963 30-amp switching supply that I picked up at a local swap last >summer. > > > >My next decision will be what to do with the RS35. I'm going to see if I >can get one of the guys in our local club to help me troubleshoot the >situation, but I'm not sure how successful that will be. > > > >I'm actually seriously thinking about purchasing a completely new power >supply, since I prefer to use a rig runner for connecting everything in my >shack to a single power supply. > > > >And this brings me to a question: > > > >Does anyone have recommendations for a good replacement supply? I am ok >with a linear supply, since it just sits on a shelf of my operating desk >here at the home QTH. To be safe, I would like something with at least the >capacity of the RS35,, or maybe even somewhat greater if it is reasonably >affordable. > > > >I'd consider another RS35, but with some of the quality control reports I >have received recently, I'm now not so sure that's the best route for me to >go. > > > >Any thoughts/recommendations? > > > >Tom Behler: KB8TYJ > > > > > >