In the past months I bought some more power supplies on eBay and Willhaben:
One is a 902503-06, which I bought from someone on Willhaben. Unfortunately I didn’t note how much I paid for it. I installed the a replacement board I had left into this PSU today. I set the voltage to 5.15V, so that under load there is exactly 5V at the C64. Photos here:
And the second is a 251053-11 which I bought on eBay on 2019-04-14 for EUR 7.50 + 4.99 shipping. The guy then forgot to send it to me forever. Now it finally arrived.
I removed the old circuit board of that one today. I have to make a replacement board first. Tom64 also has a design for this type: C64 power supply – yet another conversion, C64-PSU-251053-11 exchange board. But I will try to change the design with KiCad to replace the Murata OKR-T/3-W12 with an OKX-T/3-D12N-C.
