Quote:
Originally Posted by old_tv_nut
This is interesting to me. Does slow recovery point to weak tubes or other things as well?
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Exactly. It's an old 'quick & dirty' field test for borderline-weak tubes like hor osc and 3.58 osc. (slow achieving sync), hor. out (slow fill-out), vert. out (slow fill-out), RF amp (slow clearing snow), etc.
Same principle as the Life Test on a tube tester which drops the heater voltage down.
This was followed by the 'tap test' of each tube to show up any arcing (like the damper), intermittent shorts etc.
Made service calls more effective with less chance of call-backs.