Carbon composite in place of carbon film

[DaveWM]

That seem odd, with a good CRT and the G2's turned up 7/8 the pic should be way bright. Something is not right. The thing with CRTs is if you the correct HV and the votages are right and the CRT has good emissons it pretty much has to work right (brighness).

should be interesting to get the readings. something is off on the bias maybe in the cathode circuit after all (back to the video amp).

if all the cathodes are too high it would cutoff the CRT, the driver transistors get there signal for the luma from the emitter circuit, the base is the chorma.

for grins check the emitter voltages of those 3 power transistors (should all be the same about 16v no signal)again be careful on slip and you will ruin the transistors.