[Amps] Screen

[Bill Fuqua]

I think we are talking about two different curves.
1.  V-I curve of  plate with constant bias voltages ( this determines how 
good the constant current sink is over a range of plate voltages)  you must 
stay away from the region where the plate voltage is close to the screen 
voltage.

2. The non-linear relationship between the grid voltage and the plate 
current. You want a linear control knob for your instrument.  And the 
answer is yes for a first order correction as long as you meet the 
conditions stated in item 1.

What plate voltage range do you want? Do you plan to use op-amps or other 
solid state devices to generate g2 voltages?  If you are generating 
voltages for both g1 and g2 using solid state amplifiers, why not go to a 
feedback system to achieve linearity?

73
Bill wa4lav

At 07:10 AM 6/3/2005 -0700, you wrote:
>Yes, I did mean by sending an offset and scaled and/or inverted
>version of the control grid driving signal to the screen grid as well.
>Can't this be set up to cause a somewhat inverse distortion,
>straightening out the transfer curve?

William L. Fuqua III P.E.
Electrical Engineer
CP 177 Chemistry Physics Building
Department of Physics and Astronomy
University of Kentucky
Lexington,KY 40506-0055
Phone: 1-859-257-4155
e-mail:  wlfuqu00 at uky.edu