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

[Mark Bitterlich]

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
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