[R-390] Tube shape

Tue, 19 Feb 2002 15:11:14 -0800 (PST)

My guess is that its an evolutionary step from the
globe shape, more like a light bulb, to give the
internal structure some support at the top by just
closing the top of the tube inward.

Joe

--- "Scott, Barry (Clyde B)" <[email protected]> wrote:
> Looking at the site showing how the 300Bs are made
> me wonder why the 300B and other tubes have their
> characteristic shape.  Is this for better cooling? 
> I suppose increasing the glass area would help
> dissipate more heat, but is there something about
> the expanded shape that aids air convection around
> the envelope?
> 
> Just wondering...
> 
> Barry(III) - N4BUQ
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