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magnetron filament ?

Discussion in 'Troubleshooting and Repair' started by djp, Oct 20, 2009.

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  1. djp

    djp

    1
    0
    Oct 20, 2009
    why is it important and what happens if you hook a higher voltage filament to lower voltage from the transformer, provided cathode high voltage is same
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    Electron emittance from a cathode is highly temperature dependent, so when you go below a certain filament voltage you just won't get a useful electron flow (and output).
    I don't know all about magnetron characteristics but I have the impression they are more or less all-or-nothing devices when it comes to filament heating. I once fixed a non-working microwave by just tightening a slightly loose filament connection.
     
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