[AMPS] TL-922 Filament Transformer Protection

[Jon Ogden]

>>Is the amplitude of a spark that is generated by hotswitching a 100W 
>>signal on the input relay really large enough to drive the tube and 
>>thereby generate a change in anode current on the output?
>>
>€  Would you expect a change in input potential to cause a change in 
>anode current?

Oh, sure.  But my question is not wether or not it happens.  But as Tom pointed out, the filter action of the input pi-network will limit the response of the spark pulse.  Plus how large an amplitude is generated?  Is it enough of a voltage spike to drive the amplifier into conduction?  And even if it is the output signal on the anode still won't be all that large.  And any anode ringing will be even less of an amplitude.  Could that ringing of small amplitude be large enough to start an oscillation?  I doubt it except for in perhaps the most instable of all amplifiers.  I have no proof, but neither do you.

73,

Jon
KE9NA


--------------------------------------------------------------------------
The Second Amendment is NOT about duck hunting!


Jon Ogden

jono@enteract.com
www.qsl.net/ke9na

"A life lived in fear is a life half lived."


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