[AMPS] Re: Parasitics

[G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK)]

Jon Ogden wrote:
>Time varying resistance of the anode?  You must be suggesting that the 
>anode impedance changes over the RF conduction cycle.  However, most 
>specs sheets always list the anode impedance around a couple of K-Ohms.  
>So I assume then, if you are correct, that this is the average impedance.
>>

What the spec sheet lists is the load impedance that the tube needs to
work into. That is not the same as the output impedance of the tube
itself.

WARNING: extensive tests have shown that this question cannot be
resolved be exchange of messages. There's a thread on this subject in
rec.radio.amateur.antennas which has been going for at least a month
with not the slightest sign of resolution... and it isn't even the first
attempt...

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
                           http://www.ifwtech.demon.co.uk/g3sek

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