What uses would there be for 7638MHz and 7554MHz DRO oscillators?
Not phase locked, so not super stable, don't multiply immediately to any interesting bands either, so not that usable as a marker either.
And these have a negative supply voltage.
Shiny silvered brass from 1975.
A 2GHz local oscillator from some old 4GHz link transmitter.
Not a single circuit board in this unit. #GHz#surplus#junk#hamradio