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Re: [Phys-l] egg science



The current (non-inverter) ovens have a VERY simple circuit (with
various microswitches and such to prevent unsafe operation.) Each
oven includes a complete diagram of it's circuit.

Power switching is done directly on the 120VAC line which feeds the
massive transformer which provides the low voltage, high current to
the magnetron filament and the high voltage windings that feed a
voltage doubler (diode & capacitor) to accelerate the electrons.

Sawing open a magnetron reveals the neat geometry that causes the
beam to 'jump' around in the high B-field with the 2.4 GHz LC
resonant frequency.

My suspicion is that the inverter-ovens have the identical magnetron
tubes but a more complicated source for the current and voltage
applied thereunto.

Driving the power transformer with a higher frequency allows a
significantly less massive core to provide the same power.

The only 'filter cap's' might be in the line cord connection module.
.
At 7:13 PM -0700 4/8/12, Bernard Cleyet wrote:

bc thinks the filter cap. must be before the output switch.
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