[Boatanchors] OA3, OD3 jumpers

[Ron.K3PID]

I was browsing a schematic for a power amplifier and noticed that the designer routed the incoming AC line through the voltage regulator tubes pins 3 and 7. Upon further investigation I found mention of this jumper between pins 3 and 7 in the “glow tube” voltage regulators and its use as a disconnect so that the power is never turned on if the VR is not in the socket. What I didn’t find was any operating specification for the internal jumper. There must be a maximum current rating! The schematic I was looking at has a 6 amp fuse in the line which would mean that the internal jumper has at least a 6 amp rating. Anyone have a specification for these internal jumpers?

Because a curious mind needs to know...
Ron K3PID