[sdiy] Polysix Power supply, was Prophet 5 -15v rail is shorting

[klosmon]

The schematics for the P5 call for a 36VCT, 2.8A transformer.
I've successfully used a Mouser #546-185F36 as a replacement -- as 
long as the diode bridge & filter caps are good, it works fine.

~GMM


At 10:21 AM 11/8/2007, Tom wrote:


>On 8 Nov 2007, at 15:47, Oakley Sound wrote:
>
>>However, the Polysix does have its own +5v rail derived from its
>>own transformer winding.
>
>Not in either of mine. Both of them use a straightforward centre- 
>tapped secondary winding. One of them has been converted from US to
>UK voltage, so doesn't have the original transformer. It outputs
>19.5V-0V-19.5V with no load. The other, which has the original Korg
>transformer, outputs 21-0-21, again with no load. These three wires
>to the power supply board are the only inputs, from which all other
>voltages are derived.
>
>Otherwise, I'm not disagreeing with Tony. Any suitably rated
>transformer will be fine in a Prophet, and using a low-noise toroidal
>transformer sounds like good advice.
>
>Regards,
>Tom
>
>
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