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Re: [Amps] HV Switch Mode Power Supplies

Subject: Re: [Amps] HV Switch Mode Power Supplies
From: Bill Fuqua <>
Date: Wed, 22 Jun 2005 14:09:34 -0400
List-post: <>
I'd assume that the power supply would be put into a box with line filters 
and DC filters as well.
You want to make  sure that there is no 40 KHz switching noise on the HV to 
the amplifier because it would plate modulate it producing  40 KHz 
sidebands. However, I have found in other work that I have done that 
getting rid of the DC output noise is relatively easy.

Bill wa4lav

At 09:33 AM 6/22/2005 -0700, wrote:
>On 22 Jun 2005 at 9:04, Bill Fuqua wrote:
> >      You can go to wallmart and get a Panasonic "Inverter" microwave
> >      oven
> > for about $60. It contains a 1500 watt SMP. But there are  a few
> > problems:
>I would add to Bill's list of problems the fact that the things are
>terrible HF hash generators.  We bought one.  It works.  The new rule
>is "Absolutely no microwave use while Grumps is on the radio!"  I
>hope noone in the neighborhood gets one and decides to do a turkey in
>Whether it could be made more HF friendly or not, I don't know.
>George T. Daughters, K6GT
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