[Amps] cooling chimney?

[Robert Morris]

Think you want some high temp glass. Various models of Colman camping 
lantern globes (replacement part at any Walmart or camping store) fit 
various tubes. Made of Pyrex glass, like glass baking dishes.

Stirling Schmidt wrote:
> Hi all:
>     Here are 2 off-the-wall ideas:  Can clock-type glass domes (with hole cut in top) be safely used for chimneys to fit antique globe shaped tubes like RK65/5D23, 304TL, 250TH?  Also, what if cooling air is introduced inside a chimney via a 90-degree elbow or 2, so as to cause a 'swirl', and increase cooling efficiency?  Any thoughts appreciated...
> Stirling Schmidt KC0NXM
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