Hello Dave! > Also to give me a birdie at ~28.7 the 4 Mhz oscillator would > have to be off by approx 100 Hz !! I am confused. If the oscillator is off by 100 Hz, then at 28 Mhz you're birdie would be at 28.0007, not 28.700 Mhz. My K2 has a birdie at 28.704 or so, not too strong. 73, Lyle KK7P