Thread: 12hp4 crt
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Old 09-14-2018, 09:48 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
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Join Date: Jan 2011
Location: WI
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I'm going to guess Progressive Electronics was some place selling radio and TV parts to DIY types and that they sold used or rebuilt CRTs and came up with their own tube type designation.
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