[Amps] Parasites (parasitics)

[2]

>
>> >The question referred to suppressing 100 mHz only.  This can be done with
>a
>> >stub, a series tuned circuit that loads the parasitic at that frequency,
>>
>> **  loading the parasitic after the fact is not possible.  The trick is
>> to reduce gain at the anode's specific damped-wave ringing frequency.
>
>Probably a dumb question.. in 4-1000 amps the "parasitic" or oscillation
>that occurs was in the 90 or so MHZ region.  It seemed very easy to
>cure that by moving that "resonant" freq out of the VHF "high gain "
>region ( or is it called self resonant freq of the tube ?) down to a lower
>freq just by inserting a coil of wire in the plate lead.  No resistor needed 
at
>all, just keep the "resonance" above 35 MHZ or so, so that it did not affect 
10
>meters.
>What am I missing that this is not used more ??

**  How much L was added? 
Was it grounded-grid - or grid-driven?

>Merv
>
>


-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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