Gregg, I did forget something. the 180's AVC system works in both AM and SSB modes. And you can select "off", "fast", "medium" or "slow". There's a number of neat websites devoted to Hammarlund with photo galleries and other information. Glenn Zook is a regular here and I think his websit may have some Hammarlund links. I don't remember his web address but he puts it up here frequently. Mike