Does hitec make any receivers that work for KO? with KO crystals; I like the 03MK, but I have a 03mm that doesn't work with my helios.

The 03MK will work but you will need the Hitec Xtal. The 03MM should work with the KO Xtal. I'll have to test this.

Mike.

Mike - I would be interested to know the outcome of any testing as I own two of the 03MM receivers, one on 75mHz that I use with Airtronics receiver crystals and my Multiplex transmitter and another on 27mHz that I haven't used as yet. I also have a KO radio, but mine is the older EX-1 Mars system on 27mHz that I was hoping my second receiver could me mated with.

Let us know what you find out please.

My hitec 03mm won't work with the ko crystal. Would a futaba crystal work? Are the crystals pos/neg shift? My KO radio is a Helios 75 mhz.