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I do not understand the reluctance either. I am just now working on a 1967 Motorola B&W TV, a hybrid set. I replaced a resistor in the AGC section and the set began working. However, I noticed after one hour of playing time, the horizontal would begin shrinking. I checked and the low voltage supply was falling. Then I noticed the filter cap was ever so slightly warm.
Replaced filters-problem fixed. Another example of what these old electrolytics will do if not replaced. Other caps are mylar, etc. These are still in the set.
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