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Original Message
RE: While we're busy 'interjecting'...
Posted by dave slagle on December 26, 2016 at 08:42:57:
well.... since you are asking for wild ass hypothesis...
a typical "box plate" is planar about the cathode and has a grid and plate structure on either side effectively creating two distinct tubes in parallel. The Cylindrical model doesn't have the two discrete structures but a single one.
Now one can argue that in the planes in the "box plate" versions may (can) not be perfectly parallel leading to differing characteristics along the planes surface and the same goes true for the cylindrical version but the big difference I see is that the box plate model still has two distinct structures when viewed from the top and the cylindrical model will only have gradual change over the surface.
dave