This tube is marked AC on the press. The internal structure is that of a UV-213 and the same unusual bulb is used. There is an extra lead brought out from the side of the base that is connected to one of the plates.
General Electric AC (UV-213)
AC Full Wave Rectifier
~1924
This tube is marked AC on the press. The internal structure is that of a UV-213 and the same unusual bulb is used. There is an extra lead brought out from the side of the base that is connected to one of the plates.
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