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Old September 12th 08, 05:08 PM posted to rec.radio.amateur.homebrew
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Default microwave oven inverter P.S. revisited

On Sep 12, 10:54*am, Grumpy The Mule wrote:
wrote :

The mains rectifier could use some filtering too. Im thinking using
the caps out of some old PC power supplies


Jimmie


Lots of good parts in a PC power supply...

Use the NTC inrush limiter resistors from the old PC supply
too so the caps don't pound the snot out of the on-off switch
and line recifier.


Yeah, I was planning on using pretty much the whole input section to
the PC power supply. The one I am looking at I think I can cut out the
whole circuit with a coping saw and mount it on some standoffs. This
would put the rectifiers and caps on a seperate little chassis and I
wont have to shoehorn in the 'lytics on to the inverter board.

I was noticing that the schematic for the 120VAC uwave inverters is
pretty much the same as the 240VAC inverter. I was expecting mains
input to be different. What I was expecting was a voltage doubler on
the 120VAC board since the 240VAC board used a bridge. This would mean
that the inverter section is designed to run off of anything from
150VDC to 300VDC . I need to take a closer look at just what are the
differences in the 120 and 240 inverters.

Jimmie


Jimmie
 
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