Do you have any test equipment in your lab that uses vacuum tubes?

[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]

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/

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.

[Tubesrule]

Okd thread but I'm bored and is midnight  I have a heathkit magic eye, a couple of tube testers and something else some where.  Oh yes my heathkit IG72