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Author Topic: Be glad you didn't buy this failed power supply  (Read 3544 times)

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Offline Ral-Clan

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Re: Be glad you didn't buy this failed power supply
« on: April 27, 2008, 12:14:01 PM »
It looks quite "home-brew", but I don't think there's anything inherently wrong in rigging up a power supply like this, is there?  One power supply provides 5V for 5V pins, while the other supplies 9 or 12V for those pins.  

Sure it may be a little jury rigged, but it should work just as well as something more "factory made".

Of course, if poor quality parts are used, one of the power supplies might fail, as in this case.  But that's not a design problem.

Well....actually, there could have been a little more ventilation added.  Actually, if I had made this, I probably wouldn't have put it in that beige case at all, it may give it a neater appearance, but it restricts airflow around the black wall-wart adapters. Perhaps that's the cause of the premature failure.
Music I've made using Amigas and other retro-instruments: http://theovoids.bandcamp.com
 

Offline Ral-Clan

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Re: Be glad you didn't buy this failed power supply
« Reply #1 on: April 29, 2008, 08:40:37 PM »
Quote

Looking at the physical size of these wall warts, there is no way their amperage is rated high enough for the intended application... there is a huge potential of improper voltage levels.


After reading fully through these threads (here, Denial, comp.sys.cbm etc.) it seems that they were rated properly and the voltages were tested, if we are to take Eslapions' word.

Quote
Furthermore these wall warts being loose plugged into an generic extension cord inside a plastic closure with no fusing


Were any C64 power supplies fused?  Most that I've seen in North America were sealed shut with epoxy and had no fuses.  The European ones may have, though.

I agree the end product LOOKS crap from an aesthetic standpoint, and I'm not sure I agree with the price charged, but I'm also not convinced it is an inherently faulty design.  After all, essentially what's inside a C64 power supply are a couple of transformers like this, but in a more unified looking case.

Also, what is the point of linking to this discussion on comp.sys.cbm, Lemon64 and elsewhere?  To create a witch-hunt?  Again, I'm not taking sides: I vouched for Dragos' credibility here when you guys were jumping all over him as an Ebay scammer, but now I see the same thing happening again.  I don't know either of the guys very well, but I think we must remain objective. I see a lot of questionable opinions on electronics being bandied about and taken as fact (I'm probably guilty of this).  

If the power supply did fail, maybe this could be worked out more rationally with a refund / replacement, etc.
Music I've made using Amigas and other retro-instruments: http://theovoids.bandcamp.com