Starting work on a GE 800 Locomotive.

[jr_tech]

Originally Posted by Eric H

This is the slowest warming set I've ever seen, it takes at least a full minute before I hear the oscillator kick in, did I read somewhere it has some voltage dependent resistors in the heater string? Possibly those black round things in the HV cage?

Yep! I think that those glowbar (sp?) resistors exhibit an increase cold resistance as they age. With the 75 ohm resistors installed, my set produces a full, stable picture in about 20 seconds after turn on. The 6Al5s light up pretty bright at initial turn on, but seem to be holding up ok.

jr