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Hoffman Amps Forum image Author Topic: Tube books  (Read 3388 times)

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Offline Bub

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Tube books
« on: August 11, 2008, 02:42:49 pm »
Hi, any recommendations on books for identifying tubes. I've done a ton of research but it's still hard to figure out who made what and when for whom ever with what logo with smooth grey plates before lunch and ribbed black plates after the war etc.
Thanks in advance
Rob

 


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