Hi Alex,
We had a brief discussion here last year on this
topic.
See this link for some technical info on the
Panasonic microwave oven SPS.
http://users.bigpond.net.au/dwsmith/hv_inverter.pdf
73 & Good luck,
Marv WC6W
--- Alex Malyava <alex.k2bb@gmail.com> wrote:
> Hi,
>
> After reading discussions of "light and powerful PA
> for expeditions" at
> Russian website (cqham.ru) I got this crazy idea of
> using switching power
> supply in it.
>
> What options we usually have - it is either 20-30
> ponds of transformer or we
> do AC rectification along with voltage multiplying.
> That might be good in EU
> or some location with 220V, but here, in 120V-land
> we end up with way too
> many stages of voltage doubling...
> That made me thinking about switching power supply.
> We do have 200W PS in
> our radios or next to it working just fine. So, why
> not to make 1000V 1A PS,
> or something like that?
> Assuming that the amp is for expedition, and suppose
> to be small and light,
> I think it can be something like 500W out based on
> one (or two small)
> tube... If making 1500-2000 plate voltage is scary
> we can look for
> low-voltage tubes if there are any.
> I am pretty sure that regardless how bright your
> idea is it was already
> invented by somebody else, tried and buried :)
> It might be long time ago and current technology
> gives us some powerful
> switching FETs we didn't have 10 years ago...
>
> Am I totally wrong and don't know what I am talking
> about?
>
> Alex K2BB
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