[Amps] Grounded Screen 4CX1500B

[R.Measures]

On Nov 7, 2005, at 2:30 PM, Ian White G/GM3SEK wrote:

> R. Measures wrote:
>>> The control grid and cathode are not connected in the 30S-1.
>>
>> Not connected DC-wise, but for RF, there is virtually no signal
>> potential between the grid and the cathode.
>
> Because G1 receives a small fraction of the anode voltage as negative
> feedback, it moves in the same direction as the instantaneous RF 
> cathode
> voltage, but I think that "virtually no" signal potential" between them
> is overstating it.

.  If there was much grid-cathode signal, there would be more gain than 
is extant.  I'll wager a pint of Guinness that there is less than 2V of 
signal between the cathode and the grid at full tilt.
>
>
> -- 
> 73 from Ian G/GM3SEK
> http://www.ifwtech.co.uk/g3sek
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>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org