I don't know what I have

[gwen]

This bulb has written on it

Jan-ccod-4826
910
made in usa
Gordos6-49

Sorry I have no pictures.
Someone gave this to my husband when he was a boy. I am new at this can anyone help me with this one.
thank you

[migette]

Hi there, Welcome to the group, Would it be possible to give some description, such as shape type of base, internal arrangements of the filament and any thing which maybe written inside the bulb. Is it possible it maybe a valve [tube]. Anyway hope this may help,   Peter

[migette]

Hi Gwen,
My apologies for not getting back to you before now. This was due to me changing my service provider through a problem with my previous one.
Getting back to the lamp, still don't know what it is, can you possibly provide a sketch on this service or if not send me an e-mail at peterrwbent@hotmail.com and I can give you my home address to send one to.

I don't know what you have there, but I hope this helps a bit.  The term "JAN" refers to "Joint Army-Navy," meaning a program started in WWII to standardize common electronic components.  So my guess is that this is probably a tube ("valve" to Brits.)  There is an electronic component manufacturer by the name of Gordos, which makes relays and switching semiconductors.  So perhaps you have some sort of rectifier or thyratron (switching) tube.  "6-49" is probably the date of manufacture.

[Chaus6]

I have a picture of the bulb or tube, as I have one as well.

[Chris Kocsis]

That's a rectifier tube, often referred to as a Tungar tube (but I believe "Tungar" is General Electric's registered name for their brand of them).  It is used in battery chargers and other applications requiring a high current of DC to be created from AC.  It looks like a bulb, but is not.