[TMC] TMC CU-70 Directional Coupler Alignment Procedure???

[triodes at optonline.net]

Is anyone here on the reflector aware of the procedure for aligning the CU-70 Directional Coupler unit, as typically used with the TMC ATS-2 or SWR-1K, etc?

I have a CU-70 (the 70 ohm variant) that I would like to realign for use with a 50 ohm transmission line. The CU-50 (the 50 ohm version) and the CU-70 are of identical configuration; the only difference is in the test and alignment procedure. Unfortunately, the TMC maintenance philosophy for the CU-50 and the CU-70 was they were factory-repairable only, and as such, and to the best of my knowledge, TMC never published the alignment information for these units in any of their technical manuals.

The CU-series are very simple units with only two adjustments ("equalizer" and "null") on them, but before I touch the unit, I figured I would inquire here first.

Thanks & 73,

Bruce, W2XR