> From: "Jones Beene" 

By Jove, I think Sparber has it!  

> If any experimenter is contemplating a replication - and is going to buy the 
> similar Svetlana tube and then modify it for a replication, it would be 
> highly recommended (and relatively easy) to add a valve and vacuum gauge to 
> create a filling port so that different pressures, and different combinations 
> of gases - particularly H2 + He (the BLP formula) can be tried.

Why not make the lower dielectric portion of quartz?

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