[AMPS] TL-922 Filament Transformer Protection

[Rich Measures]

>
>Rich is a master at misquoting people.
>
>I plainly stated that I had trouble getting the tube to oscillate at 
>VHF and couldn't make it oscillate until I removed one or two 
>ground leads from the grid pins.
>
€  Readers can check Will's archive to see what Mr. Rauch stated during 
the grate parasitics debate.  
-  to find the place, search for "5 Dec 1996" or "161MHz".  This is the 
part of the debate where Mr. Rauch explains that standard AC Circuit 
Analysis really and truly does not apply to L/R VHF parasitic 
suppressors.  

>Then I watched the tube oscillate, and let it oscillate for several 
>minutes, without a single arc or big bang. The tube drew grid 
>current, and anode current, I could move the current higher and 
>lower by moving the tuning cap, but no problems other than anode 
>heat from the current.
>
>My results closely parallel the ones you quote below Ian.
>
>Date sent:      	Sat, 5 Jun 1999 23:33:51 +0100
>To:             	amps@contesting.com
>From:           	"Ian White, G3SEK" <G3SEK@ifwtech.demon.co.uk>
>Subject:        	Re: [AMPS] TL-922 Filament Transformer Protection
>
>> 
>> Picking up one of Rich's points:
>> 
>> >€  As I recall, during the grate parasitics debate you stated that you
>> >were able to make an AL-80 oscillate at c. 155MHz.  .  Dick Erhorn claims
>> >that no Alpha has never sustained a parasitic-oscillation --  even though
>> >he has reportedly seen plenty of gold-sputtered tubes.    
>> 
>> Here's part of a message sent to me some months ago, by someone who reads
>> these debates but chooses not to take part publicly - 
>> 
>> >>I did a number of commercial amplifier designs in broadcasting and MRI
>> >>(including many years of experience with YC-156 at 20kW pulse) and saw
>> >>lots of parasitics.  But never once did I see a parasitic cause damage

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