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I rediscovered a post from Corby Dawson with pinouts for the DB9 connector on the above OCXO and wanted to preserve the info here. Thanks, Corby!
1000B 1000A-100 1200 and 9110
1 EFC ground EFC ground EFC ground
2 EFC +- 10V EFC +- 10V EFC 0 to +10V
3 coarse wiper NC NC
4 +12 pot ref. (10K) NC NC
5 Ground Ground Ground
6 oven mon. oven mon. oven mon.
7 +28V oven +18V oven NC
8 +28V elect. +28V +28V
9 case ground NC NC
