[Amps] Re Direct rectification of AC mains to derive the amp, VDD, supply

[Peter Voelpel]

With the neutral lost on a direct fed power supply nothing will happen as
long the neutral connection of the p/s is connected to ground locally.
At least not in Germany where is not possible to get 115V out of the grid.

I used many transformer less amps in the past without any problem.
The power supplies built were single phase as well as three phase up to
10KVA.

73
Peter

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of peter chadwick
Sent: Donnerstag, 19. September 2013 09:28
To: Mark Bitterlich; Manfred Mornhinweg; amps at contesting.com
Subject: Re: [Amps] Re Direct rectification of AC mains to derive the
amp,VDD, supply


>So if I built my next amplifier that is directly rectified by the mains, it

 will cause a train wreck?<

If you ground the neutral to an external ground and get a ruptured neutral
on your feed, who knows? We nearly had a small shopping mall catch fire when
the 3 phase feed lost its neutral because of a backhoe driver 'skinning' the
aluminium sheath (which was the neutral) on the feed cable!

73

Peter G3RZP
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