Re: IIc+ Power Supply mod.

[bieling@terra.es (Jorge Chamorro Bieling)]

Luke Forat <iceman@nospam.digidude.homeip.net> wrote:

>    Jorge,
> 
>    your speculations are correct. Modding from 220V input to 110V is 
> possible with a wave doubler configuration (as you have noted, most non
> "autoregulating" PSUs have that switch which does exactly this) but the
> contrary is a major problem and yes you risk a cap explosion and a junction
> breakdown - some nasty fireworks and smoke. The best and quickest thing you
> can do is get a 220 to 110V autotransformer with at least a 1 Amp rating on
> the input - or - replace the PSU with a 220V one.
> 
>    Regards,
> 
>             Luke

Luke,

I think I'll try this BRUTE FORCE idea I've had:

What if I insert a 50w 110v zener in series with the bridge rectifier ?
The power supply is rated 36w, but that's maximum power. 

This switcher may have 80-90% efficiency ?
Then the zener will have to dissipate just a bit more than the IIc+... 
How much may be the average power consumption of the IIc+ ?
The how big is the radiator that I need ?
What am I missing here ?

:-)

Thanks.
-- 
Jorge Chamorro Bieling