You can't set both needles to the same ADF box, there is no need to design in this functionality. You can only set both needles to ADF (where they will display their respective ADFs - needle one to ADF one, needle two to ADF two) and then set both ADFs to the same NDB frequency. As this is the only set-up possible, this is what is assumed from the first post, and the situation explained by the sense antennae (or modern equivalent) on one of the ADF boxes is U/S.
Speaking so much of needles, ASFKAP - keep needling, I'm enjoying it, at least!
