Roundie left edge purple

[DaveWM]

Not so fast. the concern for the hot fly had me recheck the HOT grid voltage, should be -60 was -40

I scoped it, 120v pp correct waveform, but should be 190vpp

checked the osc tube all forms and PP looks good on that tube.

on the osc tube a 6BL8 screen volts look good cathode voltage looks good so short of a bad tube I cant see why the wave form would be down (but I will try subbing some tubes to see the effect anyway).