[AMPS] Blown TL922A... What to do?

[measures]

>
>From:           	Peter Chadwick <Peter_Chadwick@mitel.com>
>To:             	amps <amps@contesting.com>, Steve Thompson 
><rfamps@ic24.net>,
>  	"'W8JI@contesting.com'" <W8JI@contesting.com>
>Subject:        	RE: [AMPS] Blown TL922A... What to do?
>Date sent:      	Fri, 8 Sep 2000 13:52:09 +0100 
>
>> Tom says:
>> 
>> >.....the claims tank components arc from VHF parasitics on frequencies
>> >far removed from the tank resonance is wrong.
>> 
>> 
>> With respect, Tom, I think you're falling into the same trap Rich does -
>> generalising from insufficient evidence.
>
>With respect Peter, you seem to have not read my post.
>
>I have measured the tanks in several PA's that Rich claims have 
>arcing failures from VHF parasitics.
>
€  Mr. Rauch has "measured the tanks".  
 
>> Consider the case where there is a resonance of the the tube output
>> capacity in series with the pi tank input capacity, which series capacitor
>> combination is in shunt with the inductance of the lead from the plate via
>> the blocking capacitor (assumed to have a small amount of series
>> inductance at VHF). The tuning C and lead inductance are series resonant
>> below this frequency; you can visualise it like a pi network if you like

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