Hmmmm. Wonder if you could just induct through the glass with coils on each side? Seems perfect for high voltage applications?

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tliltocatl 5 hours ago | parent | next [-]

If you want a gas discharge tube and not vacuum, you can even drop the coil on the inside: https://hackaday.io/project/194683-plasma-toroid-sky-guided-...

But most hollow-state devices run on either DC or pulses, so coupled inductors wouldn't work.

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smlacy 2 hours ago | parent [-]

Wouldn't work ... without additional electronic components.

	▲	tliltocatl 2 hours ago \| parent [-]
		Than you can skip the hollow state part altogether. And any plastic-package parts would screw your vacuum up badly - if it survives sealing and bakeout that is.

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bluGill 5 hours ago | parent | prev | next [-]

That depends. Often vacuum tubes are used with DC (that is a rectifier) in some form though, in which case you can't do this since induction depends on AC. I'm not sure what purpose the article had for a triode though, depending on their application this might work.

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K0balt 6 hours ago | parent | prev [-]

Interesting idea! Wouldn’t have to be particularly high voltage either.