[Boatanchors] Tube ID's

[J. Forster]

>
> While going thru some more boxes of tubes i found the following.

> Then there is the GE , 4 pin mounted on what looks like it was a memade
> socket but then it may have been factory.  Can't tell.  Anyway the tube
> (it appears to be one anyway) is id'd on the base as "..NGAR Bulb 3AT. 16
> X 897" made by GE.  Now i'm not sure of the 3 in 3AT but the AT is
> correct.  Three very distinct elements standing vertical inside.  Any
> ideas on this one?


TUNGAR Bulb...  a rectifier common in low voltage ca 1930s-1950s battery
chargers. Mercury inside, maybe.

The B-H maybe a rectifier for B Battery replacement in early farm radios.
Raytheon started out making them.

-John

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