> > The OC3 VR tube goes completely dark when I turn the HV on. > Is this typical for an OC 3? I'm wondering if this indicates excessive > current through the VR tube. > Seems to me that I had to select a tube that would not do this. I would have to dig through some notes to prove it but the same thing happened here. As I remember most tubes did not extinguish. K7DFW ..._._