Originally posted by Impreza
The XXL recievers will not work with the Mars R. But they work fine with the older Mars EX-1.
They do work in normal PPM mode. Not in HRS mode.
The KO crystals are a direct fit. KO Rx uses the same internal freq as Novak, Sanwa/Airtronics, Multiples, Nosram, LRP, Mtroniks, and that is 455 Khz.