Hi Jim: I thought JJY was in Japan? http://www.pacificsites.com/~brooke/timefreq.shtml#RSL
I think the crew from what was called Temic has formed a new company called C-MAX. The C-MAX LF time signal receiver chips support automatic tuning to 3 frequencies using the same loop antenna by switching caps. The ICs also know the protocol for the various LF time stations, so products that use the C-MAX chip will work world wide (if there's a signal), but older products are typically specific to one frequency and protocol. http://www.pacificsites.com/~brooke/timefreq.shtml#VL They have app notes on how to design the loop. http://www.pacificsites.com/~brooke/Loop.shtml Larger loops are more sensitive than smaller loops. Joseph's suggestion of making a resonating loop is worth a try. Remember to orient the vertical loop both in azimuth and maybe tilt. Maybe just wind it around you house top to bottom. Have Fun, Brooke Clarke http://www.PRC68.com http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Palfreyman, Jim L wrote: > Folks, > > Living in Australia we are generally out of range of the LF time signals > (WWVB, JJY etc). However I recently purchased a multi-band travel clock > off ebay for $30 and found I could get JJY in Tasmania. > > Excitedly I purchased a Casio multi band G-Shock wristwatch (which I > really like), but have had little luck in getting it to pick up an LF > time signal. > > Since I already have tenth of millisecond accuracy locally in my house > based on a GPSDO, what I would like to do is build my own local LF > transmitter (reception within say 100m) and emulate the time codes of > one of the stations so my watch (and any future similar purchases) lock > on to the local signal each night. > > Because I like to stand on the shoulders of giants, has anyone actually > done something like this? My skills are more in software development and > hardware digital logic rather than in LF radio transmitters - so any > help or pointing in the right direction would be appreciated. > > Regards, > > > Jim Palfreyman > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
