As messy as this was I learnt a bit about the PSU. I decided to free up slack in the ac mains cable itself and source from there as ut enters the case as I could not be bothered working into the resin.

@JosipRetroBits

3 ай бұрын

Nice, as long we eliminate the original 5V DC converter, everything else is way better :) Cheers!

Why not simply pushing the main cable further through the tension relief(or remove the tenision relief if pushing is not possible ), then remove the isolation a bit and grab the AC input from there?

@JosipRetroBits

6 ай бұрын

Yes I have could done this much better. Tension in those cables is not good. Thank You for watching :)

@ralfderwerwurm6960

6 ай бұрын

@@JosipRetroBitsOk thx , just wanted to ask beforehand, because i want to do the same with two PSUs i have here. Thanks for doing the video anyway, it helps learning👌

@JosipRetroBits

6 ай бұрын

@ralfderwerwurm6960 For me, this works (electrically) very well. The important thing is to remove the load from the transformer and then it runs just slightly warm :)

I think better to use a dc to dc converter and not destroy so much.

@JosipRetroBits

4 ай бұрын

Yap, I destroyed this enclosure too much, I know. But still think that AC to DC is better because the original transformer runs much cooler with the load on the 9V coil. But any solution other than the original commodore is ok :)

@blackterminal

4 ай бұрын

@@JosipRetroBits I am going to open one of these and fit a modern dc to dc converter and swap the output cable for one that fits a Commodore +4 I have. I do not often have a supply on long enough for it to get hot.

@JosipRetroBits

4 ай бұрын

Sure :) Oh, the square one for +4; nice.

@blackterminal

4 ай бұрын

@JosipRetroBits I carefully opened the black wedged shaped one. I disconnected the 7805 regulator (which was actually working fine but I didn't like it being in expoxy) and wired in a buck convertor to the raw 12v dc and setup a 4.95v output. I was not sure if that would be enough for the plus 4 but touch wood it seems ok with that. Better lower voltage as it means less heat. The convertor gets hotter than I'd like but the fact is the Plus 4 mostly just stays in its box as I don't have time for all my computers. At least it has a safer power supply now. The original was a 110v epoxy brick.

@JosipRetroBits

4 ай бұрын

@@blackterminal Very nice. I would still go with 5.0V on DC-DC converter, there are some voltage drops inside the +4 (on the motherboard). Some ICs will not work if voltage is too low. But nice work :)