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

[Alex Eban]

Guys' you remind me of the clip that used to run on the 'net a few years
ago: a guy in India that climbed on the roof of a  train wagon' lost balance
and grabbed the wire to steady himself. What do we do: sue the railroad
company?.....
Seriously guys, use your heads, don't try to find fleas in that cheese. I've
seen power supplies so well protected that they didn't want to start.
Anybody building a kW amplifier should have enough brains to be able to cope
with 300 volts or so. You did that with 3000 volts' didn't you?
Alex 	4Z5KS

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Mark Bitterlich
Sent: Thursday, September 19, 2013 2:14 AM
To: 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?

Good to know!



Sorry, just another peanut from the gallery.




----- Original Message -----
From: "peter chadwick" <g8on at fsmail.net>
To: "Manfred Mornhinweg" <manfred at ludens.cl>; <amps at contesting.com>
Sent: Wednesday, September 18, 2013 12:43 PM
Subject: Re: [Amps] Re Direct rectification of AC mains to derive the amp,
VDD, supply


> Manfred,
>
> I am afraid you are missing my point. What you can do safely as a 
> professional engineer is not the same as the average amateur building 
> at home. For example, getting the necessary spacing between PCB 
> tracks, making an RF transformer which meets a 2kV breakdown - these 
> are things (and not the only ones) that the average homebrewer could 
> get into trouble with. Especially if they take any short cuts such as 
> deciding to earth the neutral.
>
> Many years ago now, there was an article in QST entitled "Just like 
> the QST article except...": it went into how people made minor changes 
> to the published design and had problems.
>
> I could see the same article being required again......
>
> While to see one result of an inadvertent earthing 
> http://www.railwaysarchive.co.uk/documents/MoT_Barnham1962.pdf
>
> 73
>
> Peter G3RZP
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps

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