Predicta Holiday - First power up attempt

[Electronic M]

Great! I'd check the voltages at the CRT socket against what is called for in the schematic, measure the HV, and test the CRT before trying to cook the CRT. Dimness can be gun bias circuit problems, low HV, or a weak electron-gun. Knowing which will give you a path to the most effective solution.

IIRC my B&K 466 has in it's instruction manual a 'cooking proceedure' that states to multiply the designed heater voltage by 1.4 and let it sit that way for 5-25 min (I've gone longer on hard luck cases)....That works best in test mode with it reading emission (at least with my rig).

I'd limit possible causes to a weak gun before cooking it, and I'd verify tube number and designed heater voltage before trying to test or cook it.