On Tue, 18 Mar 2008 21:18:13 -0500, Bob McGraw - K4TAX wrote: >I am very pleased with >the IMD reports of -25 dB or better with the PSK-31 mode. FWIW, -25 dB is not that great. 25dB down from 100 watts is 0.25 watts, enough to QRM a weak signal. 73, Jim