I think I know the problem. My widest filter is 6KHz, I'll have replace it with the 13KHz filter. ----- Jack WA9FVP Sent from my TRS-80 :-) -- View this message in context: http://elecraft.365791.n2.nabble.com/Amplitude-Modulation-on-FM-tp7617137p7617143.html Sent from the Elecraft mailing list archive at Nabble.com.