Amiga 500 'Stealth' Power Supply Upgrade

  Рет қаралды 2,548

Dave Poo 2

Dave Poo 2

Күн бұрын

In this video I'm going to take a Commodore Amiga A500 PSU, remove the internals and replace it with a Meanwell RT-50B. It seems that opening up the case on this particular power supply was the hardest part of the job.
Music: Double Dragon II (Amiga)
Links:
Meanwell RT-50B - www.meanwell-web.com/en-gb/ac...
www.digikey.co.uk/en/products...
Amiga power supply guide - ianstedman.co.uk/amiga-power-s...
Chapters:
0:00 Intro
1:13 Cracking open the case
4:20 Removing the old
5:30 Making the RT-50B fit
8:20 Lengthen the wires
10:04 Connecting up wires
12:35 Multimeter test
14:10 Shielding isn't connected?
15:37 Quick retest
15:53 Amiga test (Rodland)
17:10 Goodbye

Пікірлер: 23
@wimwiddershins
@wimwiddershins 2 жыл бұрын
Great choice of test game. Roland is a gem. :)
@DavePoo2
@DavePoo2 2 жыл бұрын
It's a lovely looking game. I'm looking forward to playing that one a bit more.
@more.power.
@more.power. 2 жыл бұрын
Excellent work thank you.
@DavePoo2
@DavePoo2 2 жыл бұрын
Thanks, Mr Tool Man.
@apu_apustaja
@apu_apustaja 2 жыл бұрын
*VERY* good content.
@retrojb101
@retrojb101 2 жыл бұрын
Nice one. Psu upgrade is on my list of things to do once I’ve got my weird a600 upper side disk drive issue resolved. Tempted to retrobrite that psu and a500, Dave?
@DavePoo2
@DavePoo2 2 жыл бұрын
Yeah, I'm not sure about the reliability of Amiga PSU's, they certainly aren't as bad as the C64 ones but I think it's probably a good thing to do as they are getting very old and have the capability to blow your computer up if they go wrong. I won't be retrobrighting the A500 or this PSU now as it has now already gone to another home.
@blackterminal
@blackterminal 6 ай бұрын
Retrobleach is pointless. You will weaken through plastic and it will fade back to yellow quite quickly. It's chemicals in the plastic. Do you wish to bleach every year forever? If not just let it be.
@tiemanowo
@tiemanowo 2 жыл бұрын
I bought mine a few weeks ago and I can't tune its voltages. It has this pot to correct voltages but it changes both of them at the same time. If I tune 5V rail I have 10.6V on the other, but if I tune to 12V I have 5.9V on the other :(. I'm really disappointed. Yours is also little bit off, but way less than mine.
@DavePoo2
@DavePoo2 2 жыл бұрын
The notes in the data sheet say that the 12V line will be +-8% unless the 5V line is loaded to at least 10%. "when multi-channel output, it is recommended that CH1 load > 10%".
@timmooney7528
@timmooney7528 2 жыл бұрын
When my C-64 power supply was beginning to overheat and need an external fan to run, I saw all these articles on how to fix it. Unfortunately I had the brick that was filled with epoxy.
@DavePoo2
@DavePoo2 2 жыл бұрын
Yep, I have one of those bricks. They didn't pull that stunt with the Amiga PSU luckily.
@HoldandModify
@HoldandModify 2 жыл бұрын
This is the same psu I’m very curious if will fit inside an A3000.
@DavePoo2
@DavePoo2 2 жыл бұрын
There are links in the description where you will be able to find the data sheet, it will have the exact dimensions on it so you could check. But do remember that the 5V supply in this is 4 Amps, so technically it's less capable than the original A500 PSU's but in practice they never draw anywhere near that much current (but technically they could if you had 3 external floppies and a CPU card etc etc). So the A3000 would also probably be fine as well, unless it had a lot of expansion. I'll probably do a video where I measure the current draw of the A500/600 and 1200. There was a webpage somewhere that had some measurements but it has gone missing.
@DavePoo2
@DavePoo2 2 жыл бұрын
I've found the page, and it looks like the A3000 is a little different in that it needs a -5V supply in addition to the others. (+5, -12, +12). So this RT-50B unit can't power an A3000. Here is the page about the PSU's in the Amiga's it is very detailed ianstedman.co.uk/amiga-power-supply-guide/
@TheBasementChannel
@TheBasementChannel 2 жыл бұрын
Seems strange they designed a power supply with a replaceable fuse, and then covered the screw heads to prevent access 🤷‍♂️
@DavePoo2
@DavePoo2 2 жыл бұрын
Yeah, i don't know why they did that, as I have that other Commodore PSU which is nearly the same but they didn't cover the screw holes? People do complain about Apple products and their construction that makes them difficult to repair, but gluing down covers over the screw holes really is a nasty trick.
@MsNIKITA
@MsNIKITA 2 жыл бұрын
@@DavePoo2 I think Commodore set out specification and requirements for their PSU's, which becomes their part number, provided the specs were the same, they used the same part number. Left the manufacturer to come up with solutions matching their requirements, thus some are 'heavy' wirewound transformers and others are 'light' switch mode PSU's. As a finishing touch, some manufactures inserts blank plastic plugs into screw holes to prevent young curious people from tampering with something that could potentially kill them. I would say it's a 'safety feature'. Meanwhile Apple tend to use Torx or Pentalobe screws as a deterrent.
@blackterminal
@blackterminal 6 ай бұрын
Apples way of doing things like that is terrible. ​@MsNIKITA
@vincentspencer6046
@vincentspencer6046 2 жыл бұрын
Will you sort the yellow keys
@DavePoo2
@DavePoo2 2 жыл бұрын
Not me personally, but the person who I have given this to knows how to retrobrite, so they will probably do it.
@blackterminal
@blackterminal 6 ай бұрын
There are cheaper options than the meanwell. It's actually rather expensive.
@joerhorton
@joerhorton 4 ай бұрын
Can you tell me what the cheap options are?
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