[Milsurplus] Attention Smart People... more.

[D C *Mac* Macdonald]

Re: DANGER

I believe he is speaking about the DANGER of running
the doubler DIRECTLY from the 120 or 240 VAC line. 

The schematic he shows of the circuit only includes
the SECONDARY of the power transformer.


~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ 73 - Mac, K2GKK/5 ~
~ (Since 30 Nov 53) ~
~ Oklahoma City, OK ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~


> Date: Tue, 3 Aug 2010 09:50:17 -0700
> From: jfor at quik.com
> To: arc5 at ix.netcom.com
> CC: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] Attention Smart People... more.
> 
> IMO, the circuit, if operated w/o the floating transformer winging, is
> very dangerous.
> 
> -John
> 
> ============
> 
> 
> 
> > Please take a look at this full-wave doubler circuit:
> >
> > http://www.kwarc.org/bulletin/99-04/tech_corner.htm
> >
> > At the end of the page is this warning:
> >
> > This circuit can be operated off the AC line 120 or 230 V).
> > BUT the negative ground must be left floating since
> > one side of the line Is grounded and YOU CANNOT ground
> > both the Input and the NEG (or POS) DC or else B O O M!
> >
> > I guess I'm stupid (I've only had one cup of coffee, so there's my
> > excuse),
> > because I don't see a current path from the DC B+ side
> > to the AC line, other than ground which is supposed to be -0- potential
> > on both sides. Now, if your B- ground came loose on the power supply
> > and you didn't have a grounded line cord installed
> > (which would be even stupider than me with this kind of voltage)
> > you'd have full B- on the chassis to ground and your wife
> > would have to pay for a funeral.
> >
> > OK... what am I missing here?