--- In ham_amplifiers@..., R L Measures <r@...> wrote:
### Not quite. The GRID RING is bonded to the chassis !! This
is not a case like Rich using 1/2 watt resistor's as "grid
fuses"
which WILL leave the grid floating]
RICH SEZ... Tony -- Have you ever blown a grid fusing R and observed
what happens?
### WE are talkin bout a metal triode... complete with either a
socketed grid ring... or a YC-156/YC-243... with a built in grid
ring.... NOT a SB-220... with 1/4 or 1/2 watt 30 ohm resistor's
installed between one grid pin and chassis.
## IF the 30 ohm resistors explode open... tube shuts down....
nothing happens.... except it's now a pain in the butt to
change out the 30 ohm resistor's........ hence a rear panel 3agc
fuse holder... with a fast 3agc grid fuse... installed between
grid shunt and chassis..... takes 4 seconds to replace. In that
above Rich modified SB-220... the grid is left floating in a
vac....which isn't gonna harm anything... and no, the anode is
not gonna arc to a now floating grid... then arc to the
cathode.
73 Jim VE7RF
