16-07-2023, 09:15 PM
Have to disagree there, the diode conducts when the transformer output is positive charging the capacitor to peak voltage.
When the xfmr output voltage is negative the capacitor voltage adds to this, driving the magnetron fliament/cathode negative by more than the voltage from the transformer alone.
I believe that the value of the capacitor is fairly critical and is used to set the output power from the magnetron.
On my old Panasonic oven the capacitor failed short producing a loud hum without blowing the fuse. The diode failed a few weeks later.
Jim
Just seen your update.
When the xfmr output voltage is negative the capacitor voltage adds to this, driving the magnetron fliament/cathode negative by more than the voltage from the transformer alone.
I believe that the value of the capacitor is fairly critical and is used to set the output power from the magnetron.
On my old Panasonic oven the capacitor failed short producing a loud hum without blowing the fuse. The diode failed a few weeks later.
Jim
Just seen your update.
