[Amps] Design VS parasitic

[Carl]

Nonsense yourself.

Each tube has its own parasitic signature and doesnt need a supporting cast 
to determine it.

John understands the process and explained it well.

Going by your idea every amp would need a different suppressor design when 
all used the same tube. The path you described is well below high VHF and 
can be seen with a GDO or VNA. Most of the time it is harmless.

Tube engineering traditiion places the suppressor right at the plate cap for 
a reason and not somewhere on an imagined or arbitrary tuned line.

Carl
KM1H





----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: "Amp Reflector" <amps at contesting.com>
Sent: Sunday, August 23, 2009 8:34 PM
Subject: Re: [Amps] Design VS parasitic


> ORIGINAL MESSAGE:
>
> On Sun, 23 Aug 2009 10:55:12 -0400, "Carl" <km1h at jeremy.mv.com> wrote:
>
>>
>>BTW, the strays have minimal effect on a parasitic. If you note, the
>>suppressor is before any LC circuitry. Tubes have their own built-in 
>>natural
>>parasitic resonance
>
> REPLY:
>
> Nonsense.
>
> The "stray" inductance introduced by the wire from the anode to the 
> blocking
> cap, from the blocking cap to the tune cap and the internal lead length 
> inside
> the tune cap, and the return through the chassis back to the tube are 
> ABSOLUTELY
> ESSENTIAL. to creating the VHF resonant circuit in the first place. The
> parasitic suppressor is not "before" this LC circuit, it is right in the 
> middle
> of it.
>
> Those are all "strays" and to say they have "minimal effect" on a 
> parasitic is
> ridiculous.
>
> 73, Bill W6WRT
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