I know this isn't really the place to ask, but does anyone know of any published information on the design of goniometers? (the radio ones, not the medical ones) 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com