If you pull this rabbit out of your hat, how about an IPO. John k7up At 08:32 AM 16/10/09, you wrote: >It may be possible to do full duplex with the sub receiver on a >different band and antenna from main, since it's very well-shielded. >I'll give this a try. Some firmware changes will be required. > >73, >Wayne > >---- >http://www.elecraft.com