In Farhan's video on frequency alignment he uses a 40m AM signal to zero beat too.? Does it have to be a 40m signal?? Can't I use WWV at 10 MHz?? Or for that matter, adjust to a known signal, e.g., the Noon-Time-Net that meets everyday at 7,284 MHz.? Tuning to that LSB signal until I hear the best audio.? Just curious.? I'm going for an alignment later today.? I'll worry about the low audio another day, probably after the holidays.? Thank you all, 73 Richard AG5M