[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Tricked Out Microwave Oven
Original poster: David Speck <dave@xxxxxxxxxxxxxxxx>
The usual operating mode for MWOs that I'm familiar with is already
"full power". Some of the ovens I've owned can be run at less than
full power by periodically interrupting the transformer current.
However, I suspect that the magnetron tube typically runs at only a
50% duty cycle, because a typical voltage doubler circuit puts out a
pulsating DC output voltage which swings from 0 volts to 2X the input
voltage on every 60 Hz cycle. I suppose that you could get higher
power out of the tube if you added a beefy 4KV DC filter cap across
the doubler output.
However, I doubt that the magnetron would survive long at double the
input power, nor would the HV diode in the doubler survive long if
called upon to provide double the time averaged output current. MWOs
are tightly engineered to absolute max tolerances on all the
components to minimize production costs. You could probably combine
two MWO voltage doubler circuits running 180 degrees out of phase,
followed by a filter cap, but you would still have the limitation of
the power handling capacity of the magnetron.
Perhaps if you were lucky to find one of the old battleship grade
Amana RadaRange or Litton MWOs, there might be more room in the specs
for performance boosting. Given the chintzy wire and toy-like
components in the current production Sanyo, Kenmore, and similar
ovens that I see in the junk after only a year's use now, I doubt
that you could push them much further.
Tesla list wrote:
Original poster: mileswaldron@xxxxxxxxxxx
Is it possible to change the duty cycle of a regular Microwave Oven,
so that the maximum output power is increased beyond the maximum
that can be set by the controls? I guess I need to find a microwave
oven schematic, and figure out how a magnitron works, and all that
stuff, but maybe there is some ingenious soul here; who might just
share the answer.
I am pondering research into a microwave amplification device based
upon Tesla resonators, standing waves, and constructive
interference. I want to modulate the frequency of microwave emissions.