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@eharmon - Jason of @JdM74 was kind enough to do some stress testing on this power supply. I am reposting his communications to me below. Note that the voltage measurements were taken at the floppy connector. "First round of testing: Stock SE and SE/30 [4MB RAM] No boards installed Spinning...

Hey All, The eBay listing is live! https://www.ebay.com/itm/266898469654 Price is set at $134.99 + shipping. Take a look through the description and let me know if it all makes sense. I plan on making a cut and dry installation video in the near future, but since I've never produced...

@mari3311 - Excellent observations! Yes, the ripple + noise for the Mean Well IRM-60-12 states 120mVp-p in the datasheet, but I have found from experience that the ripple voltage is typically about 1/2 of what is stated as worst case. If you take a look at the report for the IRM-60-12...

Hey Hey I received the new PCBs and built a few up for a test fit - The mechanical details align to fit in all three styles of PSUs. Next, I'll be sending one off to test in a fully functional SE/30. Attached are a couple pictures of the final product.

Thank you @mari3311 and @codevonlux for your detailed responses. I was unaware that the PSUs had been reverse engineered, but that is a wonderful surprise. I have already finished my second version of the PSU replacement and have deleted the diode and capacitor isolation from the +12V rail. I...

Hi @cooltr6 - I should have been a bit more clear in my previous post. The Singapore and Astec versions are different, both in PCBs and metal enclosure. I had originally believed that there were two Astec versions, but in fact there is only one. So, as it stands, there appear to only be three...

I also discovered another part number for the SE/30 PSU while I was surfing the web the other night - PN: 661-0370. See attached diagram for reference. If anybody has one that they would be willing to mail me, I would be most grateful. -Chris

Hi @cooltr6 - I received the third power supply from @JDW and have confirmed that it is the same type as yours. Thank you for posting detailed pictures so I could verify. I have completed the PCB design for V1, and sent it our for manufacturing. I expect that I should receive the shipment by...

@cooltr6 - Thanks for the pictures! It appears that the 'Made in Singapore' version is substantially similar to one of the Astec versions. I am currently waiting for this version to arrive from @JDW. I should have it in a week or so. Let's hold tight on shipping yours out until I have a...

Hey Jason, Could you post a couple pics of your PSU to this thread? I will send you a direct message about sorting out the logistics for shipping, etc. -Chris

Hi cooltr6, Would you be willing to mail me this ‘made in Singapore’ version? I’m happy to pay shipping + a little extra for the inconvenience. I won’t need it once I have taken the necessary measurements and done a test fit with the new PCB, so I’d be happy to send it back when I’m finished...

Hello All, I am currently looking into designing a drop in replacement power supply for the SE/30 that would fit all of the major versions of stock PSUs. What I have currently found is that there appear to be three major versions: Two from Astec, and one from Sony. I was able to obtain one...