Quote:
Originally Posted by andy
The later models, like that one, added a HV divider block to provide the focus voltage to the CRT. They produce a slightly sharper picture than the low focus voltage CRTs used in the earlier ones. You can see the block to the left of the HOT, and the focus control to the right of the antenna jack.
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I think the major manufacturers discovered that low focus voltage CRT's weren't the answer. When those tubes got a little older, they seemed to lack clarity. Moving the focus jumper didn't seem to help much. The tubes have a perfect reading on the CRT checker.