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Re: [Amps] Parasitic Suppressor 4-1000A

To: amps@contesting.com
Subject: Re: [Amps] Parasitic Suppressor 4-1000A
From: Steve Thompson <g8gsq@eltac.co.uk>
Date: Fri, 10 Mar 2006 21:19:21 +0000
List-post: <mailto:amps@contesting.com>

R; Measures wrote:

> If a VHF suppressor does not get hellishly hot at 29MHz, it is unlikely 
> to absorb energy above 30MHz .

Depending on how much energy and at what frequency, it might not need to 
get that hot at 29MHz. If you can't make the measurements, then it's 
better to play safe - but that can be an open door for folk lore and 
misunderstandings.
> 
>>
>>    Adding L increases dissipation at 29MHz,
>>
>>> decreases the parallel-equivalent resistance seen by the anode at its
>>
>>
>> ..increases.. I think.
> 
> 
> Z-meter tests show that more L-supp means less VHF RL at the anode, and 
> that means less VHF gain at the anode's self-resonant freq. --
If the tune-C is disconnected from the plate, does the tube oscillate?

Steve
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