You don't need glass for external anode tubes because you are dealing with
lower temperatures and infrared radiated by the anode does not have to
escape thru the glass. Any material that has low dielectric loss and is
good to 200 degrees C or even less will do. And besides you no longer have
a good reason to be able to see the anode since it does not glow.
73
Bill wa4lav
At 11:52 AM 5/2/2005 -0700, Bob Easterbrooks wrote:
>I've been using Coleman lantern globes for chimneys for years. Now they make
>them in smaller diameters and they might be suitable for external anode
>tubes. Just a thought. 73, Bob K6JQA
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