Should have added the appropriate S-unit readings as well, I guess. Assuming S9 = 50 uv @ 50 ohms, -73 dBm: -28 dBm = 8900 uV (8.9 mV) = S9+45dB -15 dBm = 39,800 uV (39.8 mV) = S9+65dB 0 dBm = 223,600 uV (223.6 mV) = S9+73dB - Bruce N1RX