Troubleshoot the Astron RS-20A Linear Power Supply
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- Опубліковано 26 лис 2022
- A $3.50 bridge rectifier breathed life back into this $180 power supply
Helpful Links
- Astron Replacement Parts: www.astroncorp.com/shop
- Astron Power Supplies: www.astroncorp.com/power-supp...
- Schematic: static.dxengineering.com/glob...
The Yaesu Ft891 is rated at 23A current draw, and that is a 20A power supply. Perhaps that contributed to the failure.
Yep very true! I think that was it, I typically run it at 100W for phone/voice. With the new rectifier, I"m running at 40W with FT8 and just had contacts with Russia, Canada, Japan, I think that's as high as I'd want to go with it in FT8.
UPDATE: I fixed my 1990's Astron RS-20 by replacing the bridge rectifier (KBPC3502, TME Electronics, $1.44 ea). I also bought a tube of heat sink putty from Amazon. Thanks again for your video!
that's great news! i was so relieved i didn't have to mail in my power supply!
Nice, thanks! I think I'll skip the varistor check and go right for the rectifier swap on mine. Same thing- turn on and fuse blows instantly.
the Yaesu maint guy said the same thing!
Dumb question, what kind of fuses are those? Just popped the fuse in my rs20a and can't find the information on what fuse to replace it with.
I see a 5A on the schematic: static.dxengineering.com/global/images/technicalarticles/asr-rs-20a.pdf?_gl=1*vdrhqo*_ga*MTY0NzY0MDY0OC4xNjk5MTA2NDUy*_ga_NZB590FMHY*MTY5OTEwNjQ1MS4xLjEuMTY5OTEwNjQ3MC40MS4wLjA.
Amplifier ????
linear power supply, freudian slip, I'd like santa to bring me a linear amplifier, hohoho
The caption is misnamed but it’s a nicely done video.
UA-cam on my phone failed to report that my reply was entered so I hit submit a few times to be sure! Sorry. I hope I deleted all the duped. Again nicely done.
BYW I saw this on LinkedIn first. 73
Originally I wanted, How I Troubleshot..., but that was too long for mobile users, What would a better caption be?