Developing a new A500/1200/600 power supply. -12V needed?

[Amiga1992]

Originally Posted by Retrofan

Don't worry about the "nice neat package"; I've got an empty C64 (epoxy kind) PSU awaiting for something inside...

The case of the C64 PSU is one of the reasons the power supplies blow up. No space to breathe as said before in the thread. Don't do it.

[Retrofan]

Originally Posted by Akira

The case of the C64 PSU is one of the reasons the power supplies blow up. No space to breathe as said before in the thread. Don't do it.

No, that has no sense. The C64 PSU is filled with epoxy, that't why it doesn't breathe (at all). I taked out the epoxy and got it empty. If I want I can also put a fan there.

[cpiac64]

i opened the psu made in italy, one trafo wiht an exit 9 vac directly connected with plug. the other exit is dual (need measure) connected like this schematics https://encrypted-tbn0.gstatic.com/i...vSraVpZFqjY-ew

[john1979]

Originally Posted by Retrofan

No, that has no sense. The C64 PSU is filled with epoxy, that't why it doesn't breathe (at all). I taked out the epoxy and got it emty. If I want I can also put a fan there.

I've gone the dual wall wart method. Using a 9VAC U.S Robotics Modem adapter and a 5V 2.5A Power Pax UK adapter.

[Retrofan]

Originally Posted by john1979

I've gone the dual wall wart method. Using a 9VAC U.S Robotics Modem adapter and a 5V 2.5A Power Pax UK adapter.

Great. Links? Photos? Did you put an on/off for both at the same time or do you plug them separately as they are?

[BarryB]

Even Ray Carlsen sells the Dual Adapter PSU, 9VAC and 5VDC, doesn't look like he's done anything extra other than wire them up for a C64 and charges $50. The same PSUs can be bought for less than £20 (plus postage) from Farnell:

5V DC: http://cpc.farnell.com/powerpax/ptd-...ted/dp/PW02604

9V AC: http://cpc.farnell.com/stontronics/t...1mm/dp/PW02816

You just need a 7 pin DIN plug and the appropriate C64 pinout: http://www.allpinouts.org/index.php/...4_Power_Supply

[ajk]

@Retrofan

I've built a dual solution also. Some photos and explanation here. It's not as nice as a single unit but it's cheap, easy and works well.

[Retrofan]

Originally Posted by Arnie

@Retrofan

Couldn't you use a 12v supply from the ATX and regulate it down to 5v ?

I've seen this step-down: http://www.ebay.es/itm/301659359044?...%3AMEBIDX%3AIT

Will that be ok? Or do I need more amps or what? I would use it inside the Amiga to use the 12v line for the 5v demanding line.

[jiffy]

Originally Posted by Arnie

So what's wrong with Ray's psu, not reliable enough or too expensive or both?

Nothing. But he's in the US and I'm in the EU (the Netherlands, to be precise). Although his PSUs are far from cheap, I have been tempted to buy them (one for my C128, one for my C64 and three for my A500/600/1200). But importing them from the US would about double the price for me and that would be far more than I'm willing to pay (customs is hell...).

I'ld very much like a relatively compact (ah well, I don't really mind if they're a little bigger compared to the original ones...) new PSU for my old 8 and 16-bit computers. High quality and reliability is my prime concern, a nice, clean case is second (no barebones ATX!), size is third and price is in last place.

For me to buy it, it would have to be found inside the EU to keep the costs acceptable. If Ray would be selling his PSUs inside the EU, I would buy several of them in a heartbeat.

I've also been looking at the PSUs Mechy offered, but the high costs of importing them from the US have kept me from buying several...

I'm not looking for an El Cheapo solution. I'm looking for a high quality solution I can afford.

[Arnie]

How about one of these ,the guy lives in the Czech Republic.

[jiffy]

Looks nice, but it's not a finished product: he only sells the insides of the PSU and I don't have the (soldering)skills to complete it...

[Retrofan]

Looks insteresting. But I prefer to pay 15 instead of 40. http://www.ebay.es/itm/ATX-MINI-NETZ...item48830b677c

[Predseda]

Mounty, any progress in your development?

I use this:

Meanwell MW RT-65B

Input:

88V to 264V AC
125V to 373V DC

Output (perfectly suits A500/A600/A1200):

+5V DC @ 6A
+12V DC @ 2.8A
- 12V DC @ 0.5A

Case I use:

BOPLA EG-2050L

[trixster]

Any progress?