Hi

A Rb bulb normally has no conductors at all. It's "lit" by RF rather than DC. 

Some of them are made on modified light bulb manufacturing equipment. The shape 
is a compromise between what the gear handles and what the ideal shape would 
be. 

Bob

On Sep 5, 2013, at 8:48 PM, Alan Kamrowski II <[email protected]> wrote:

> Hi,
> 
> Curiously why is the Rb bulb designed the way it is?  Having an open area in
> the base where a contact would normally be?  What is the purpose of that?
> 
> Also, does it have one conductor or two?  If so, how?  I only see the
> base...
> 
> Thanks,
> 
> Alan
> 
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