[Amps] Design VS parasitic

[Roger]

Carl wrote:
>
> ----- Original Message ----- From: "Roger" <sub1 at rogerhalstead.com>
> To: <dezrat1242 at yahoo.com>
> Cc: "Amp Reflector" <amps at contesting.com>
> Sent: Monday, August 24, 2009 1:49 AM
> Subject: Re: [Amps] Design VS parasitic
>
>
>>
>>
>> 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)
>
> How do you propose to do that when the tube itself is the source?
Reduce the tube gain in the parasitic range to prevent the oscillation? 
At least that's what I've been reading on here. <:-))

73

Roger (K8RI)
>
> Carl
> KM1H
>
>
>