Thread: Muntz "madness" two 1952 models
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Old 06-28-2022, 03:27 PM
Tom9589 Tom9589 is offline
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I hope you meant to say that you have a 21YP4 instead of a 21ZP4. The 21YPA is an electrostatic focused tube while the 21ZP4 is a magnetic focused tube like your 20CP4.
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