SV: [AMPS] Tetrode Amp Help

[measures]

>
>Hej!
>
>Do you really need a stabilized screen grid supply? 

€  On page four of Eimac's specification it says that the screen voltage 
must be maintained constant. 

>If the g2 voltage
>follows relatively slowly the envelope of a SSB signal, you should get a
>only a slow gain variation in the tube??? 

€  Not slow.  Anode current increases exponentially with increasing 
screen potential.  

> You have then to use a large
>condenser across the g2 voltage. 

€  Why?  One is trying to bypass HF and VHF energy in the anode-grid 
feedback path.  .  

>If I remember right ( and I may be wrong
>)looking into the NAG gg two meter 4CX350 linear  the g2 voltage adjusted
>itself 

€  Eimac recommends constant screen voltage for all tetrodes and all 
pentodes in linear service.  . 

>to the average drive level and you could use anything from 3-10 watts
>of drive with good linearity.

€  Only if  screen potential is held constant. 

cheers, Hans.  

-  Rich..., 805.386.3734, www.vcnet.com/measures.  


--
FAQ on WWW:               http://www.contesting.com/ampsfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm