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LO became unlocked at different Az positions during r1610. Randall inspected the twister cable and found one had a kink. it also made a grinding noise if flexed. The problem was just below a hoop in the twister. That length of cable was suspected to be Heliax. That length has been temporarily replaced with a piece of LMR400 that was also in the loom. The loss of LO lock problem seems to have gone away and the R1610YG experiment has continued.