>
>
>-----Original Message-----
>From: measures <2@vc.net>
>To: Steve Thompson <rfamps@ic24.net>; AMPS <amps@contesting.com>
To: <amps@contesting.com>
>Date: 04 August 2000 15:41
>Subject: Re: [AMPS] Suppressors
>
>
>>>This is not borne out in practice. Anode-resonance frequency is not
>>>changed much when the suppressor is shorted out.
>>
>>
>>In which case, the inductance contributed by the suppressor must be
>>insignificant in the system.
>
>The suppressor was shorted out by c. 1" of copper wire. This has c.
>10nH, about the same L as R-supp. This is why the anode resonance
>changes little.
>----------
>According to Wes' measurements, the suppressor contributes many 10s nH into
>the circuit.
>
The resistor has about 10nH. L-supp is in parallel with it. Total L
can not be more than 10nH.
>>This means that Q of the suppressor alone is
>>unimportant - the only thing that counts is its ESR vs frequency
>>characteristic.
>>
>? VHF ESR is directly related to VHF Q.
>
>
>In terms of which defines which, it's the other way round. Q is defined by R
>and X. The XL contributed by the suppressor appears to be unimportant in the
>overall system, in which case the Q of the suppressor is unimportant in
>overall terms.
Suppressor Q has a direct effect on Rs, and that affects VHF gain.
>That's not to say that the inductor value in the suppressor
>isn't important - you have to choose R and L values to give the ESR vs
>frequency characteristic that you need.
>
This is not the case. To optimize the staggered resonances effect, one
needs equal VHF current in Rsupp and Lsupp.
In other words -- An optimal suppressor divides the anode-resonance
ringing current between L-supp and R-supp.
later, Steve.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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