In message <aanlktimsqshe+yehhhydw2v2edj855sszt78mpqch...@mail.gmail.com>, paul swed writes:
>Is there a real advantage to a 4 or 6 foot big loop compared to a small >loop? >I use a 3 foot loop on wwvb/preamp and that works well. There is a very good and simple explanation of the theory behind loops here: http://www.vlf.it/octoloop/rlt-n4ywk.htm Sensitivity rises with the area of your loop, so doubling the diameter gives you four times the signal, which may or may not be a relevant low number of dB. >One other point on the wavefrom on loran c. It was constructed to minimize >the impact of skywave influence on the receiver. Essentially making it >easier for the receiver to distinguish between the two. Thast what I hadread >in the loran docs. Yes, this is why you should always zoom in on the 3rd positive zero-crossing. Inside the announced service areas, the skywave will never arrive early enough to disturb the groundwave at that point. >PS I thought the bw was +/- 10KC and even wider. Yes, it is, but the amount of actual energy once you get past +/- 10kHz or 15kHz is very very limited. The perfect bandwidth is where the S/N of the loran-C signal is 1:1, but I have never found a good way to determine that automatically. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ 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.