Hello
I have Ko Propo Presto EX-11 with receiver KR 297FZ 75Mhz

I need 2 receiver but i can`t find in internet 297FZ 75mhz

Somobody can tell me can i use other receiver(cheap)

for example airtronics 92836 3ch 75Mhz or other ?

Dont know if this helps ,but you can use JR recievers as well ,with KO transmitters and the opposite as well.I have a EX10 and found it easier to locate JR stuff instead of KO.As a matter of fact I do have 2 of the novak JR micro recievers I will sell for cheap.Two for thirty dollars,lemme know if you want them.

Airtronics is compatible with your KO tranmitter. JR is also compatible like intimidator said. You may also use Sanwa.

Your KO is not compatible with Hitec or Futaba receivers.