I have posted a block diagram and circuit description here - http://www.navy-radio.com/rcvrs/coupler/cu872.htm Nick K4NYW www.navy-radio.com On Thu, Jul 17, 2014 at 6:51 PM, Phil Mills <pmills7 at comcast.net> wrote: > Roger, > > That was a very interesting rundown on the use of the > multicouplers. > >