[Amps] Design VS parasitic

[Roger]

Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Sun, 23 Aug 2009 08:28:50 -0500, "kingwood" <k5jv at kingwoodcable.com> wrote:
>
>   
>>        Now, if we know the frequency of this unloaded parasitic, why can't 
>> we build a trap, or load, inside the final compartment to absorb it before 
>> it does any damage?  
>>     
>
> REPLY:
>
> You are missing the fundamental purpose of a parasitic suppressor. It does not
> "trap", "load" or "absorb" the parasitic. Instead, its job is to  reduce the
> gain at the parasitic frequency enough so the tube will not oscillate. 
>
>   

Wouldn't it be correct to say (paraphrasing): Designing a circuit to 
prevent parasitic oscillations rather than designing one to deal with 
the results of one?

73

Roger (K8RI)
> It is all a matter of gain. Not "loading", "trapping" or "absorbing" the
> parasitic. If the parasitic suppressor does its job of reducing gain correctly,
> there won't be any parasitic oscillation present to be "laded", "trapped" or
> "absorbed". 
>
> 73, Bill W6WRT
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