Quote:
Originally Posted by andy
I've never been a fan of the low focus voltage CRTs that were popular in many of the early color portables. A really strong tube looks decent (still not as good as a normal CRT), but they lose focus very early in life. Sets using them usually don't even have a focus control. There were usually 3 voltage taps that you could plug a jumper into. The settings were blurry, less blurry, and more blurry. Fortunately, they stopped making them by the mid 70's. Even the late model Portacolors switched to a high focus voltage CRT with a voltage divider connected to the anode.
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Yes! I almost forgot how difficult it was to get good sharp focus on the 11WP22 used in GE sorta-color and 15LP22 used in the RCA CTC22.
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04-22-2014, 05:57 AM
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