Mighty Monarch of The Air

[vts1134]

Originally Posted by miniman82

Just rob it from a newer set. I get mine from BPC stuff, just cut the anode lead off the flyback and discard the HV cup.

Bingo. Never thought of that, we throw tube TVs away almost daily!

[vts1134]

Update.
I've replaced the filament loop wire with 50kv rated wire. I've also got a third 1X2. Those haven't solved the problem. I also now have a high voltage probe and am getting some interesting readings. The 16GP4 has a maximum anode voltage rating of 14kv. I can't get the input voltage on the set over 95v before I am above 14kv on the anode. Anode voltages above 14kv is also when I start to have problems with the 1X2 sparking and glowing.
I've also adjusted the horizontal drive as per roundscreen's suggestion. Turning the drive up increases the anode voltage and subsequently makes the 1X2 spark and glow when voltage reaches over 14kv. As long as I keep the anode voltage below 14k I can run the set as long as I want with no 1X2 problems.
Any thoughts on why my anode voltages are so high with the set on 3/4 power? Sounds like this might be the whole problem, but what could be the cause?