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Re: [Amps] Switching Power Supplies

To: "Joe Isabella" <n3ji@yahoo.com>,"Steve Thompson" <g8gsq@eltac.co.uk>, <amps@contesting.com>
Subject: Re: [Amps] Switching Power Supplies
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Fri, 14 Jul 2006 21:48:54 -0400
List-post: <mailto:amps@contesting.com>
> Why don't you ask these folks:
>
> http://www.wattsunlimited.com/
>
> Surely one of you have disected this thing already.  No, 
> it's not a good supply for a "tube with handles", but it's 
> pretty cool for what it is...


17% no load to full load regulation isn't so hot Joe. I'm 
not sure how that would be for IM products or CW waveform 
since power out is generally about the square of supply 
voltage change. The CW waveform would look funny with that 
much sag.

As for faults, the problem faced by a supply near the 
negative rail, especially one with a grounded screen, is a 
HV to ground fault dumps crap back into the supply. Most 
supplies are pretty good at running into shorts, but they 
are almost always terrible about handling reverse applied 
voltages from supplies hundreds of times higher in voltage.

73 Tom



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