There is a problem with your plan - the UT4R’s will not work in radio mode with the UR92 . The UR92 is the duplex radio transceiver and the radio portion will currently only work with the DT402D. The UT4R’s would require a UR91 receiver. Digitrax is planning on releasing a UT4D which would work with the UR92, but I have no idea when that is supposed to happen. Depending on your timetable, you might want to proceed as planned but just wait on buying the utility throttles until Digitrax releases the duplex version, or buy the non-radio version and upgrade when the upgrade becomes available.
NY&N
Thanks for getting back with us. You would not believe the number of times someone comes on here, asks a question and then never responds at all. You are always left wondering if they even read the replies! Your update is appreciated,
Quick summary and clarification of the Digitrax receivers and what they are compatible with.
UR90 IR only panel. Will work with any of the current range of Digitrax throttles as they all have IR capability.
UR91 Simplex Radio receiver. Only throttles with an R designation will work with the UR91 in radio mode. DT400R, DT402R, UT4R etc. Also has IR capability.
UR92 Duplex Radio receiver/transmitter. Only throttles with the D designation will work with the UR92 in radio mode. Currently the DT402D is it. There is supposed to be a UT4D in the future sometime, but no release date has been announced AFAIK.
A standard DT400 can be upgraded to either a DT402, DT402R or a DT402D this upgrade program starts in September with pricing and details on the Digitrax site. There is an assumption that a similar program might also be available in the future for the UT4 throttles, but I don’t think it is official.
I agree with the socket idea on the 402d although I doubt it will ever happen. The first thing I did with mine was shorten the cable on mine to about 3" and crimp on a new end.
I have to say that the wire does not bother me in the least. I just fold it back and hold it in my hand behind the throttle. But then, up till now all my throttles had the tether cable which is so much more cumbersome and quite heavy, so the radio cable seems like no problem by comparison.