[Amps] Grid fuses (was: Life and gain of 3-500Z)

[Peter Voelpel]

Valvo suggested in their transmitting tube tube manual to switch a 50K
resistor from grid to ground by the anode overload relay to keep a ground
path for the arc to discharge

73
Peter

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Will Matney

The way I see it, it's the same, as that connection is in series with any
anode fuse or glitch resistor. The way I also see it, if a tube starts to
arc, it's gassy and needs to be replaced. So why let an arc continue
possibly ruining the HV supply and having to repair it? If the resistor or
fuse is sized correctly, it would tolerate regular operating grid current,
and maybe a little over current from tuning, but blow open if it's
excessive. I think this is what Rich means, I may be wrong. If we take say
3000 Vdc and placed it acorss a 30 ohm resistor, that would be a current
flow of 100 amperes, am I correct? This across a 1/4 watt resistor?