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QUESTION: I have a RCA 6F6G, pin 6 on this tube is N/C, but is physically missing.
Was it normal manufacturing process to omit certain pins
and leave an unfilled hole on this type of tube? (or any tube)
Can't see how this would keep the atomosphere out.
The tube tests fine on my knight, but I'm wondering
if this tube would actaully survive in use, with no apparent
vacuum?
ANSWER: The socket is attached to the tube (the glass part) afterwards. You
could even remove the socket entirely and the tube would still work,
assuming that you solder it into the circuit. (Not normally recommended
practise, however)The vacuum is fine if the tube tests fine. They just saved $.015 by
omitting pin 6 during manufacture
On an octal tube, the base is a separate piece from the main body of the
vacuum
tube. The tube actually has wire leads protruding thru the glass
envelope, and
these are terminated on the plug pins with solder after the plug is glued to
the bottom of the tube (and wire leads fished thru their respective plug
pins.
A missing pin doesn't matter if the basing of that tube shows a "NC" for
"no connection".
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