ctc12 clone beam current

[timmy]

ok L14 measures 11.6 and 6.6 ohms so thats ok. the crt bias measures 6.20 k from terminal end to end and the wiper, the ohms are smooth. what is an acceptable ohms for the bias pot at full counter. all resistors around the service switch test perfect. i even took the pot apart to see if any burn marks or anything that dont look right, it looked new. i am curious as to which wire and where it goes is the actual one that triggers or determines the hv regulation because if the regulator is good now then if there is anything else further up the line in the circuit somewhere that maybe off a bit because this is the biggest improvement in this set since i have it. so its just about there. 6gm6 i changed even though it tests good just the heater lit very fast as opposed to another new one i have so i changed it to avoid anything later with that tube if the heater was stressed in any way.

[DaveWM]

pot and L14 sound good.

I suggest since it seems hyper sensitive to blooming you try the following.

start with just the raster, setup for the good 25kv from low to full brightness.

connect a meter to the crt red cathode lead (yellow/red) note voltage and adj crt bias, see what happens It should smoothly decrease in voltage as you turn clockwise.

do the same for the other cathode leads yellow blue and then yellow green, but not only test the bias pot but the two drive pots as well on those colors (green and blue, there is no red drive pot).

see if all the controls result in smooth gradual voltage changes.