It looks like the mix is: 2X146.76 - 147.36 = 146.16Mhz
2X146.76 = 293.52Mhz would have to be made somewhere for the mix to occur. I would think that the most logical point would be in your final PA stage. Have you sniffed around your PA stage with a short probe to see if you have 293.52 and 146.16 being created in this stage? 73, Joe, K1ike
