In message <4e580972.6080...@pacific.net>, Brooke Clarke writes: >It looks like the noise floor is maybe 10 dB higher than the AMRAD >http://www.prc68.com/I/Images/AMRAD_BT.GIF > >or 30 dB higher than the McKay Dymec active antenna. >http://www.prc68.com/I/Images/Da100nf.GIF
If you are basing that claim on the SA plot in my blog-post, you instantly win the "inappropriate apple-oranges comparison price of the year" First there is nothing even remotely close to a natural noise-floor in the LW broadcast band in the middle of a city here in Denmark, there is far too much EMI from switchmodes etc etc. Second, there is a significant impedance mismatch between the antenna and my SA in that plot. I backhaul the signal over a balanced twinax cable (78Z I belive) and crank it up for the LORAN-C receiver in the matching balun, so the feed impedance is way higher than 50Z Mind you, I don't dispute that you may be right, I just don't think you have data to back up your claim... -- 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.
