Just an update for anyone else trying to figure this out.
RouterOS 6.21rc14 seems to have a fix for this. I don't see anything in the CHANGELOG for it but i assume that is for the rc14 and not rc1-14. So I am uncertain when the fix occurred.
You had any luck? Not me, after 6.19 the 5 and 10Mhz channels are not working for QRT no more. SXT has no issue with same software version. I tried 6.20, 6.21 and 6.23, all the same.
MT, I made ticket on this over a week ago, still no answer. Ticket#2014120566000659
@MT; Any update on this soon? 10Mhz is important for me and I'd like to keep my rb's up to date....
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Rudy R. Puister
WISP operator based on MT routerboard & ROS.