Thread: What Happened to 15AP22 Through 15FP22?
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Old 05-19-2014, 06:04 PM
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Robert Grant Robert Grant is offline
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Maybe someone on this thread can answer an unrelated question in the same verve: How did the 1DN5 (a diode-pentode receiving tube similar to the 1U5) wildly jump the queue of the 1**5 sequence?
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