SV: Re: SV: Re: SV: RE: [sdiy] Multiple Voltage Power Supply / design problem!

[karl dalen]

--- Seb Francis <seb at burnit.co.uk> skrev:

> If you wanted to do things the linear way then just a normal 15V AC 
> wallwart will give you +/-15V DC.

Yes and no, that will give half wave rectification and the regulators
will go dearly hot even with large reservoar capps.(depends on current
offcourse).
 
> Simpler maybe, but definitely not more efficient.  I know switching 
> power supply is a bit of a dirty word on this list, but actually there 
> is a lot of decent studio equipment around nowadays that uses them (all 
> the latest Mackie mixing desks for example).  And if you can run a 
> super-quiet mixing desk from a switcher then it's not going to be a 
> problem to run an analog synth...

Im not talking about a switched supply, im talking about a 12v AC
wall wart blob feeding a a tiny 1:1 transformer. Sinus in sinus out,
then secondary's feeds the standard linear regulators.

Btw the Voyager uses a switched supply. 

KD



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