PSU 230V vs 110V

[exxos]

(Table values will be updated as they are worked out)

It looks like there are just some small resistor changes around the main drive transistor. Makes sense that higher voltages also tally with higher voltage resistors..

230_110.jpg (4.91 MiB) Viewed 117 times

PART	230V	110V
R9	0.33R	0.27R
R2	51K	39K
R2A	51K	N/F
R7	33K	15K
C5	47uF/400V	47uF/200V
T1	230V / 0.45A	117v / 0.9A

[mikro]

From what I can see, the caps are also a bit different (for less voltage, that is). If you want, I can write the values down for you.

[exxos]

From what I can see, the caps are also a bit different (for less voltage, that is). If you want, I can write the values down for you.

ahh, yeah, the main cap will be different voltage, but think others will be the same.

[exxos]

Actually the transformer may be different..

Mine (230V) has :

ATR-L043-1
AC INPUT 50/60Hz
230V / 0.45A

[mikro]

Yes, that note about the transformer is a good point (and a huge overlook on my side).

ATR-L043-2
AC INPUT: 50/60 Hz
117v / 0.9A

The big cap: 47uF / 200V
The three second-biggest caps: 1000uF / 16V
The slightly smaller cap near the big three: 330uF / 25V
The three small caps: 2x 47uF / 25V & 22uF / 25V (in the center of the PSU)

So I guess I have my answer? It would seem I can't simply change caps and resistors to get a 230V one.

[exxos]

Yes, that note about the transformer is a good point (and a huge overlook on my side).
So I guess I have my answer? It would seem I can't simply change caps and resistors to get a 230V one.

Looks like you would need to change the transformer , plus cap & resistor changes.. getting on for a re-build really it seems.

[mikro]

Looks like you would need to change the transformer , plus cap & resistor changes.. getting on for a re-build really it seems.

... or put your PSU instead. Nobody can blame me for not trying! I guess I'll change the exploded cap, test it (on 110V this time) and sell it without the base.

Chris, if you think you could use it for your experiments, I'll gladly donate it to you.

[exxos]

Chris, if you think you could use it for your experiments, I'll gladly donate it to you.

If it unfixable then sure , can look a bit closer at parts I guess.

[mikro]

Chris, if you think you could use it for your experiments, I'll gladly donate it to you.

If it unfixable then sure , can look a bit closer at parts I guess.

Posted today. Surely it's fixable but I have realised that I'm too lazy to desolder the cap(s), investigate which (quality) ones I need to purchase, order it, wait, solder, obtain a 110V power source and then finally put on eBay. If it helps you to extend your knowledge or improve your products, that's a much better reward.

[exxos]

Posted today. Surely it's fixable but I have realised that I'm too lazy to desolder the cap(s), investigate which (quality) ones I need to purchase, order it, wait, solder, obtain a 110V power source and then finally put on eBay. If it helps you to extend your knowledge or improve your products, that's a much better reward.

Cool thanks Yeah, will investigate it when I get a moment. Probably worth documenting blown stuff should someone else do it in the future