[Amps] Parasites (parasitics)

[2]

>Hello Rich:
>
>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.


>or a parallel tuned circuit in series with plate lead.  

**  A diagram, explanation, and circuit analysis are needed.

>Either than amplifier
>can be made to have no gain at 100 mHz by design or it can be loaded so
>that it has no gain because of the load at that frequency.  
>
**  A gain of under one will do quite nicely.

>If parasitics only occurred at 100 mHz, parasitic suppressor design would
>be easier.  You asked a simplistic question and I responded accordingly.
>
**  VHF parasitics seem possible only at a VHF anode resonance, and only 
when anode current changes.

>Colin K7FM
>
>
>> [Original Message]
>> From: 2 <2 at vc.net>
>> To: <k7fm at teleport.com>
> > Date: 3/27/03 8:51:18 AM
>> Subject: Re: [Amps] Parasites (parasitics)
>>
>> Attribution marks corrected manually
>> 
>> >Rich asked:
>> >
>> >>"**  Is it possible to design a VHF suppressor that suppresses 100MHz,
>but 
>> >>does not suppress 30MHz ?"
>> >
>> >Response:
>> >
>> >Yes.
>> >
>> **  Please describe the process, Colin.  Thank you.
>> >
>> >
>> >
>> >
>> >
>> >_______________________________________________
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>> >Amps at contesting.com
>> >http://lists.contesting.com/mailman/listinfo/amps
>> >
>> 
>> 
>> -  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
>> www.vcnet.com/measures.  
>> end
>
>
>
>--- COLIN LAMB
>--- k7fm at teleport.com
>--- EarthLink: The #1 provider of the Real Internet.
>
>
>
>


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