I'm hoping to reproduce this cavity stabilized oscillator design from NIST but at 12 GHz as an ultra low phase noise reference clock for the vector signal generator. This nonsense is optional, the clock could be as simple as an LMX2594.

These pipe couplings are very close to what I need for a TE015 resonator at 12 GHz. They need some minor machining, polishing, endcaps, coupling loops.

tf.nist.gov/general/pdf/1887.p
tf.nist.gov/general/pdf/2729.p

Two large (2.5" pipe size) copper pipe couplings.
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