[Amps] Direct rectification of AC mains to drive the amp, VDD Supply

Manfred Mornhinweg manfred at ludens.cl
Mon Sep 30 09:26:40 EDT 2013


Alex,

I fully agree with you on this. I most often do it that way too. Even 
without the benefit of a rubber mat. But in this crazy world, where some 
people who mess up and hurt themselves look for other people to blame it 
on, and often succeed in their claims, one has to be careful when 
recommending any methods that aren't 100% dummy-safe! You never now what 
subspecies of homo not-very-sapiens might read it, understand only half 
of it, and then try to apply it!

Manfred



Alex Eban wrote:
> For god's sake guys! Why complicate?
> Do what power supply people did for 40 years when working on offline power
> supplies: disconnect the scope's ground wire and stand on a rubber mat. The
> scope transformer is tested at 10 times the line's voltage and the chances
> of going bad are really slim!
> I know it's not safely safe and all but I'm still alive after having done it
> for the 40 years I mentioned. Just be careful. If you can find some old
> Tektronix from the 500 series: these had transformers tested at 2500 VAC.
>  And BE CAREFUL that's all folks!
> Alex	4Z5KS

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