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Old 25th June 2005, 09:24 PM   #1
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I am restoring a philco jr radio model 81a and I want to test the tubes however I am not familiar with the numbers
they are 77,80,42 mY tube tester manual has no such numbers
eg 4dt6,4eh7,4ej7 ............. anyone know the equivalent numbers ?
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Old 25th June 2005, 11:28 PM   #2
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I got an answer for what it is worth
the fine people at antique radio forum were a big help



80 = 5y3g
42 = 6f6g
77 = 657g
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Old 28th June 2005, 07:08 AM   #3
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try this link for good tube information and possible subs. Good luck! John C.

http://www.nostalgiaair.org/Tubes/
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