Products > Test Equipment
Do you have any test equipment in your lab that uses vacuum tubes?
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SeanB:
Anybody have a use for a GE 1358x CRT though, has slight burns on it, from being run at high power as a chart recorder, but otherwise working, complete with the mumetal shielding can. Going to be expensive though to ship, but I can almost guarantee it will survive, will be packed HP style.
Yansi:
I have a couple of old Russian RF generators, that have some pretty interesting stuff inside, including a bunch of twobs. These are a the G4 series generators, that go from about 1GHz to up to some tens of GHz.

The front looks like this:



And what's inside, see below. Pretty impressive stuff, especially that mechanical linearity trimming. 

See this thread for photos of the inside: https://www.eevblog.com/forum/rf-microwave/russian-microwave-signal-generator-g4-80-teardown/

//EDIT: Sorry, I have forgot that I have already uploaded the teardown here ^^
Larryc001:

This was “Spotted this randomly, a lovely shot of a Type 531A at NASA, dated Dec
31, 1960” by another enthusiast.

https://www.flickr.com/photos/nasacommons/15708311313/in/contacts/
vk6zgo:

--- Quote from: Larryc001 on December 31, 2019, 10:45:28 pm ---
This was “Spotted this randomly, a lovely shot of a Type 531A at NASA, dated Dec
31, 1960” by another enthusiast.

https://www.flickr.com/photos/nasacommons/15708311313/in/contacts/

--- End quote ---

And it looks uncannily like it is displaying a field rate analog video signal.
Maybe " Display something to make it look technical "?
OK, it could be that the bottom line is just "no input", & the juxtaposition of the square wave is just a coincidence.
David Hess:
Oh, I forgot, I also have an HP TS-510/U UHF signal generator.
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