Fading in and out. Next time Google "Q signals" , there are a few of them. Anyway I think I'm straight now. I tell ya Mike, this thing needs to be on PC board. Other than the 7 to 10 watt amp...3 stages, the whole rest of the thing is on proto-board. So, what I have to do is twist wires around until all of the carrier is gone. There are about 3 key areas, one of them being the modulator section itself. You wanna talk mini circuits....lol. That first can has a few home made mini-circuits. But after I got the buffer installed and fought with new ground loop, I went through and bent wires to were there is no carrier. Not readable on my power meter anyway.