Commodore 64 Power Supply

[Philip Belben]

Roy J. Tellason wrote:
> On Sunday 29 June 2008 20:08, Ray Arachelian wrote:
>> Seth Morabito wrote:
>>> Does anyone know of a commercially available replacement power supply,
>>> before I go off and build one?  A linear supply would be trivial to
>>> design, but I've never done a switching power supply, which I suppose
>>> would be greatly preferable.  The trick with the C64 is that it
>>> requires both 9V AC and +5V DC.  (I've considered frankensteining
>>> together 9V AC and +5V DC wall-wart adapters onto the same DIN-7
>>> cable, but it just feels so very very wrong).
>> Sounds like you just need a single 9VAC power supply, a bridge, a
>> voltage regulator, and perhaps some caps to clean up the signal a bit.
>> The trick is to provide enough wattage.
> 
> No.
> 
> The 9VAC has to be a separate transformer winding from the one that provides 
> the +5VDC eventually,  because of how it's used...

There are plenty of transformers around with two 9V secondaries.  I'd 
reckon on using on of at least 20VA rating even if you have a switching 
regulator.

I went on to the RS Components web site and found this, despite its 
being an utter pig to search:

http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=5405163

(Note for our American readers.  RS Components is not Tandy, it's the 
supplier formerly known as Radio Spares.  People still sometimes call it 
Radio Spares, although AFAIK that hasn't been its name for at least a 
quarter century...)

Philip.