PS... now that I've got ur attn, anyone know a 'filter' that hunts
out a hetrodyne freq. and nulls it automatically?

Marty-

I'm not familiar with the part number, but years ago I purchased a Radio Shack
DSP unit. I consider it lousey for its intended purpose, but one thing it did
was remove heterodynes. It was so good at it, that it would also remove the
voice of someone who talked in a monotone!

73, Fred, K4DII