Thread: Extract Pubdate
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Old 01-10-2013, 08:30 AM   #11
theducks
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Quote:
Originally Posted by gridlewak View Post
Right you are there.

I'm a tad different here. I like collecting stuff like this. Sometimes, when just digging up some history on these items, checking older versions of the books can give me an idea as to when a specific tube may have been introduced.
Ah!
Old ARRL Handbooks might help , but I don't know about the suffixes (5U4GB)

Nothing like the cheery glow of a pair of EL34's
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