Uncle Peter wrote:


if they are using some sort of pulse width control of the klystron duty
cycle.

Somehow I seem to remember an early commercial 'radio oven' that used
a klystron; can anyone confirm this?

I was just expressing an opinion. My kitchen microwave is a Panasonic
inverter type.

Please post photos of it together with make and model info; if you
feel frisky, photos of the interior and PCBs would also be helpful
together with a photo of the wiring-diagram label that is often
included.

Regards,

Michael

"MarkAren" wrote in message
ups.com...
This may be a daft question, but is Marketing name for the product
"Inverter" ?

Doing a quick search on eBay, several ovens pop up with this name, one
description was "Panasonic Inverter Microwave Oven 1100W" - looks like
a 110V product to me.

I have never heard of a 12 or 24v microwave oven, 1100W at 24v = 45
amps which seems excessive even as a load for a large truck.

Regards,

Mark

yes, there are appaently 2 types, one is made to run off of 12 volts maybe
24 VDC and the other runs off of 120VAC.
I think the 120VAC initially converts it to 300VDC then aplies it to the
inverter circuit.. Still trying to find a schematic to verify. I would think
this technology could be a major help for amp builders allowing us to build
inexpensive power supplies and easily custom wind the inverter transformers.

Jimmie

Jimmie D wrote:

there are appaently 2 types, one is made to run off of 12 volts maybe
24 VDC and the other runs off of 120VAC.
I think the 120VAC initially converts it to 300VDC then aplies it to the
inverter circuit.. Still trying to find a schematic to verify. I would think
this technology could be a major help for amp builders allowing us to build
inexpensive power supplies and easily custom wind the inverter transformers.

Please dig out the ones you have and take photos, front and rear of the
entire unit and if you don't mind, disassemble and photograph and
components. I can host the photos if you wish (email them to me).
This would _really_ help in the evaluation until any of us find schematics.

Regards,

Michael
msg _at_ cybertheque _dot_ org

"msg" wrote in message
...
Jimmie D wrote:

there are appaently 2 types, one is made to run off of 12 volts maybe 24
VDC and the other runs off of 120VAC.
I think the 120VAC initially converts it to 300VDC then aplies it to the
inverter circuit.. Still trying to find a schematic to verify. I would
think this technology could be a major help for amp builders allowing us
to build inexpensive power supplies and easily custom wind the inverter
transformers.

Please dig out the ones you have and take photos, front and rear of the
entire unit and if you don't mind, disassemble and photograph and
components. I can host the photos if you wish (email them to me).
This would _really_ help in the evaluation until any of us find
schematics.

Regards,

Michael
msg _at_ cybertheque _dot_ org

Wish i could, i dont even have one of them now. wife said i couldnt tear
them up and donated one to a church and we are using the other. i noticed i
can get the service manual for a few bucks and will probably do that, i was
hoping i could find one for free. Sometimes sevice manuals dont go into that
much detail. though.

"msg" wrote in message
...
Jimmie D wrote:

there are appaently 2 types, one is made to run off of 12 volts maybe 24
VDC and the other runs off of 120VAC.
I think the 120VAC initially converts it to 300VDC then aplies it to the
inverter circuit.. Still trying to find a schematic to verify. I would
think this technology could be a major help for amp builders allowing us
to build inexpensive power supplies and easily custom wind the inverter
transformers.

Please dig out the ones you have and take photos, front and rear of the
entire unit and if you don't mind, disassemble and photograph and
components. I can host the photos if you wish (email them to me).
This would _really_ help in the evaluation until any of us find
schematics.

Regards,

Michael
msg _at_ cybertheque _dot_ org

Seems i am going to be looking for a couple more as the wife laid claim on
these.

"Jimmie D" wrote in message
...

"msg" wrote in message
...
Jimmie D wrote:

there are appaently 2 types, one is made to run off of 12 volts maybe 24
VDC and the other runs off of 120VAC.
I think the 120VAC initially converts it to 300VDC then aplies it to the
inverter circuit.. Still trying to find a schematic to verify. I would
think this technology could be a major help for amp builders allowing us
to build inexpensive power supplies and easily custom wind the inverter
transformers.

Please dig out the ones you have and take photos, front and rear of the
entire unit and if you don't mind, disassemble and photograph and
components. I can host the photos if you wish (email them to me).
This would _really_ help in the evaluation until any of us find
schematics.

Regards,

Michael
msg _at_ cybertheque _dot_ org

Seems i am going to be looking for a couple more as the wife laid claim on
these.


I did find some info saying the switcher was run using IGBTs.