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Old 07-22-2018, 09:39 AM
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zeno zeno is offline
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Join Date: Mar 2013
Location: New Hampshire
Posts: 4,672
Few newer B&W TV's had a focus control. Sometimes there is
a jumper of sorts to give a few different voltages to the F grid.
But I have never seen one that makes a difference !

73 Zeno
LFOD !
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