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4hv.org :: Forums :: High Voltage
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Solid state Microwave oven transformers

Author Post
HazzWold 1993
Fri Mar 12 2010, 09:19AM Print View
Registered Member #2563
Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
Hey all!, just picked up a few inverter style microwaves. and stripped them apart. and i was just wondering, if anyones got much experiance with these.
Is the board these ferrite cored MOT's on. worth keeping as it, or should i just salvage all the components off it.
I recall hearing that trying to use this for powering something or drawing an arc, will just kill it.

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Fri Mar 12 2010, 09:51AM
Registered Member #1361
Joined: Thu Feb 28 2008, 10:57AM
Location: Cairns, Australia
Posts: 305
I think they can be used, but recalling a previous thread from here, I think you need some signals to get the things to fire up. After that, I think they also have 2 modes, a high and a low mode.

I think I also remember hearing that they heat up quite quickly, but I think it did work for drawing arcs.

Hopefully someone here can help some more
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Fri Mar 12 2010, 10:07AM
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Posts: 634
This may be worth looking through:

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Proud Mary
Fri Mar 12 2010, 10:10AM
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4958
HazzWold1993 wrote ...

Hey all!, just picked up a few inverter style microwaves. and stripped them apart. and i was just wondering, if anyones got much experiance with these.

That looks like a Panasonic inverter. There is a handy nicely illustrated pdf on how to use them for other purposes, here:

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HazzWold 1993
Sat Mar 13 2010, 02:07AM
Registered Member #2563
Joined: Mon Dec 21 2009, 10:17AM
Location: Australia
Posts: 280
Thanks everyone. Funny that the two people asking bout these are both Harrys ;)
And yes, it is a panasonic
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Sat Mar 13 2010, 12:48PM
Registered Member #1034
Joined: Sat Sep 29 2007, 12:50PM
Location: Chillicothe, Ohio
Posts: 143
Hazz, you might want to check this out too.

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Sat Mar 13 2010, 03:15PM
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: Republic of Guernsey
Posts: 3803
i have one of these pcbs here which is DOA, not sure why.
took the transformer off and there is some damage but may be repairable.
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Sat Mar 13 2010, 05:39PM
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
I've had a few. Only got one up and running; just for a single session then it was gone. That's most likely why you wind up getting them (obviously) - but when I stripped it I was looking up the parts and found that some items are quite expensive if bought via Mouser or other retailer. Unquestionably worth having and keeping regardless of functionality. A great source.
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Mon Mar 15 2010, 08:47AM
Registered Member #2538
Joined: Sat Dec 12 2009, 06:56AM
Location: San Luis Obispo, CA, USA
Posts: 10
I have used one of these supplies (not exact, but very similar) to successfully power a tesla coil, though not continuously. The power supply would draw over 1500W from the wall during heavy operation, but did heat up very quickly. If an appropriate fan were implemented, you may be able to keep it cool enough. Think about a microwave - it has to be able to run continuously at a high power. My unit did occasionally latch off in a fault condition, but if I simply reset the signal to the control (disconnect and reapply the battery attached), the supply started right back up.

I like the links above to the HV power supply guide about this unit.
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