[Amps] Passive grid:

[Gary Schafer]

Rich wrote:

>
>   At least 800 screen V are needed.  The simplist and safest
> screen supply is a zener-string shunt regulator at the lv end of the hv
> bleeder.

Hi Rich,

I have always worried about using a zener string from the HV supply for the
screen. What happens if the plate choke or something else should open in the
plate circuit?
Also if one were to turn off the HV supply and key the rig before the HV
decayed to zero, you could have low plate voltage but still have full screen
voltage. That would mean very high screen current.

73
Gary  K4FMX