Quote:
Originally Posted by Yamamaya42
yes, a faint line in the center, a weak horizontal output tube is the first suspect.
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A 'quick & dirty' test for a borderline HO tube is the "seven seconds off" test. Turn the set off for 7 seconds, then back on. If the width is slow to fill back out, the tube is borderline. Same test will show up other borderline/weak tubes like H oscillator, vert out, color oscillator, RF amp etc.