http://www.nd2x.net/EME/k0yw/tracking.html
As another mentioned digital encoders are used all over these days. Antenna position, tuning, volume, frequency and squelch controls etc. Also for CNC positioning :) They should not be hard to find or expensive for most hobbyists to use. Gary K8IZ At 12:37 AM 6/14/2009, you wrote: >2009/6/13 Gary Fiber <[email protected]> > > > More than likely for radio frequency tuning. Using an encoder to > > control the tuning of a Direct Digital Synthesizer. Tuning up and > > down in frequency in as small as 1 Hertz increments. > > For my High Sierra HS1800/Pro adjustable antenna, I utilize SWR > > readings to adjust it. > > I also have an automatic device that controls the radio tuning > > sequence and then runs the motor of the antenna until the SWR > > measurement is where I set it to be originally. > > > > Step motors however would be very useful for satellite communications. > > > > Gary Fiber K8IZ > > > >Maybe so, but the DIY'ers I read about use them for _antenna_ tuning - ro >rotate the big thing outside that is. >(The radio hobbyists I know love gardens, not as much for the apple trees as >to fit a bigger antenna...) >------------------------------------------------------------------------------ >Crystal Reports - New Free Runtime and 30 Day Trial >Check out the new simplified licensing option that enables unlimited >royalty-free distribution of the report engine for externally facing >server and web deployment. >http://p.sf.net/sfu/businessobjects >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users Gary Fiber K8IZ GROL PG-19-6691 Washington State Resident ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
