Google 'fractal antenna'. Fractal Antennas are a relatively recent (late 1980's to mid-1990's) discovery/invention. I have read that they are approximately 20% more efficient than normal antennas.
Jim, KG4FXV >________________________________ > From: d0ct0r <t...@patoka.org> >To: Discussion of precise time and frequency measurement <time-nuts@febo.com> >Sent: Saturday, February 22, 2014 12:54 AM >Subject: Re: [time-nuts] WWVB antennas > > >I am impressed by Casio engineers who created tiny antenna for my wrist watch. >I don't know how, but that Pathfinder able to catch and decode 60 khz wwvb in >noisy city environment. And it did even better when i was 500 km north ! > >:40, Alexander Pummer wrote: >> here are the other 60kHz transmitters: >> http://www.ka7oei.com/wwvb_antenna.html >> >> U.S. based WWVB transmitter. As described, it >> could also be used for theUK-based 60 kHz MSF >> <http://en.wikipedia.org/wiki/Time_from_NPL> MSF signal formerly >> the Rugby clock* *and the >> Japanese 60 kHz JJY <http://en.wikipedia.org/wiki/JJY>_ >> _our fiend in Australia most likely*_ _*receive the "JapaneseWWVB" >> 73 >> KJ6HUN >> Alex >> _*//*_ >> >> >> >> >> >> >> On 2/21/2014 12:21 PM, Robert Roehrig wrote: >>> John Forster said: >>> >>> "WWVB is hard to detect w/ a 3-foot diameter HP shielded loop w/ integral >>> preamp & 2 stages of mechanical filters. (HP 117A). The other half of the >>> time it was undetectable. Paul S uses a loop that is much larger." >>> >>> I am near Chicago and I have 2 60 kHz antennas. One is a ferrite >>> rod type and the other a 5 foot diameter loop. Both are tuned >>> and feed identical 2 transistor preamp. The loop does work better. >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > >-- WBW, > >V.P. >_______________________________________________ >time-nuts mailing list -- time-nuts@febo.com >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. > > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
