Emulators of Classic Computers

From: William Donzelli <aw288_at_osfn.org>
Date: Tue Jan 20 22:32:31 2004

> How so? Are flight times between cathode and anode shorter than
> transit times between emitter and collector? Or is there some other
> effect going on that I've missed?

That is basically it - flying electrons don't have other junk to bump into,
like they do in solid state.

This transit time problem pretty much killed standard tubes in the microwave
region - to get the things to work properly, the cathode-grid-plate
spacing had to be extremely small. Small, however, is not good for other
reasons, namely power and capacitance.

William Donzelli
Received on Tue Jan 20 2004 - 22:32:31 GMT

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