I had two Jr radios one 27 and one 75(XR3). The 27 receiver went bad and the steering wheel mech in the 75 radio went bad. So I took then apart and there were two circuit boards one with the screen and a smaller one that the crystal hooked into. I unplugged the smaller board in both the radios and and I made a 75 mhz working radio labled 27 mhz. Probably doesn't help you because you dont have two radios and the board is almost 90 bucks.