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General => General Technical Chat => Topic started by: N2IXK on November 25, 2015, 07:22:55 pm

Title: Tubes in the IEEE Spectrum.....
Post by: N2IXK on November 25, 2015, 07:22:55 pm
They ain't dead yet....

http://spectrum.ieee.org/semiconductors/devices/the-quest-for-the-ultimate-vacuum-tube (http://spectrum.ieee.org/semiconductors/devices/the-quest-for-the-ultimate-vacuum-tube)

http://spectrum.ieee.org/semiconductors/devices/introducing-the-vacuum-transistor-a-device-made-of-nothing (http://spectrum.ieee.org/semiconductors/devices/introducing-the-vacuum-transistor-a-device-made-of-nothing)
Title: Re: Tubes in the IEEE Spectrum.....
Post by: AF6LJ on November 25, 2015, 07:36:17 pm
That was a good read..
TWTs Gyrotrons and the like are far from dead.
After all the LHC is the world's largest vacuum tube.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: calexanian on November 26, 2015, 05:20:32 am
Fun stuff.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: Mechanical Menace on November 26, 2015, 07:07:43 am
Quote from: AF6LJ on November 25, 2015, 07:36:17 pm
After all the LHC is the world's largest vacuum tube.

Surely the Stanford Linear Accelerator is the worlds largest vacuum tube. The LHC is more of a toroid than a tube...



I'll get my coat.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: AF6LJ on November 29, 2015, 05:09:14 pm
Quote from: Mechanical Menace on November 26, 2015, 07:07:43 am
Quote from: AF6LJ on November 25, 2015, 07:36:17 pm
After all the LHC is the world's largest vacuum tube.

Surely the Stanford Linear Accelerator is the worlds largest vacuum tube. The LHC is more of a toroid than a tube...



I'll get my coat.

It is also a vacuum tube that happens to be toroidal shaped.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: N2IXK on November 29, 2015, 06:58:11 pm
Quote from: AF6LJ on November 29, 2015, 05:09:14 pm
It is also a vacuum tube that happens to be toroidal shaped.

Think of the LHC as a REALLY big brother of the betatron:

http://lampes-et-tubes.info/xr/xr088.php?l=e (http://lampes-et-tubes.info/xr/xr088.php?l=e)
http://lampes-et-tubes.info/xr/xr033.php?l=e (http://lampes-et-tubes.info/xr/xr033.php?l=e)

Title: Re: Tubes in the IEEE Spectrum.....
Post by: SeanB on November 29, 2015, 08:09:19 pm
I will bet they were all made by hand, using a team of professional glass formers.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: AF6LJ on November 29, 2015, 08:38:53 pm
Quote from: SeanB on November 29, 2015, 08:09:19 pm
I will bet they were all made by hand, using a team of professional glass formers.
They have that look.
Title: Re: Tubes in the IEEE Spectrum.....
Post by: TerraHertz on November 30, 2015, 11:41:41 am
Couple of examples. A YH1170, and an NEC LD-927.