Hi!
I have just borrowed a few pieces of these Russian microwave generators from the G4 series. This one is G4-80, tunes from 2.56 GHz to 4 GHz. I plan to use these for some MW experiments, until I spare some money for somewhat decent RF generator.
I need to modify the machines a bit, at least with a N output connectors and IEC mains inlets. So while I am at opening the units up, I]d like to share a few pics with you, as I think these are a brutally awesome pieces of electro-mechanical engineering. Also, they are in very decent shape inside.
By the way, the unit seems to be manufactured 1978-1979. Not that old, actually.
The unit looks like this:
I was stunned to find vacuum tubes inside, when I removed the side cover:
Then I managed to remove the covers (was a bit tricky, screws well hidden):
Look at this awesome mechanically tuned cavity linearizing mechanics! A metric shit ton of set screws!
Don't know what for these screws are, maybe linearization of the mechanical attenuator. Goes down to -190dBm
(at leas that's what the dial says).
Huge precision potentiometer: