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Phihong PSM 4012-2 (Rev-A2) PSU

Posted: 03 Feb 2020 10:45
by pixelpusher
Hi folks,

I got my hands on a Mega ST psu I hadn't seen before: Phihong PSM 4012-2 (Rev-A2) PSU. Any idea how this performs (got no equipment to measure noise, regulation, etc.).?

I found a download link for the schematics here, but it seems to rather rare one (ain't mentioned in the last upgrade PSU thread either).

Re: Phihong PSM 4012-2 (Rev-A2) PSU

Posted: 03 Feb 2020 11:19
by exxos
Never seen one, post a image ?

Re: Phihong PSM 4012-2 (Rev-A2) PSU

Posted: 03 Feb 2020 12:14
by pixelpusher
Sure:
PSM 4012-2-RevA2.png
PSM _4012-2_top.jpg
The machine was still sealed - so this was the factory state.

Re: Phihong PSM 4012-2 (Rev-A2) PSU

Posted: 03 Feb 2020 12:25
by exxos
I think I did see one of those years ago. One of the less common ones I assume.

Re: Phihong PSM 4012-2 (Rev-A2) PSU

Posted: 03 Feb 2020 12:27
by pixelpusher
exxos wrote: 03 Feb 2020 12:25 I think I did see one of those years ago. One of the less common ones I assume.
Let me know if you're interested (and have time) to put it through your test bench - I could swap it ...