Hello LFers, While laying in bed this morning pondering the inside of my eyelids I got to thinking about the electrodes used for "through the earth" communications. What is more important, the depth
A paper I read suggested multiple small rods were as good as one large one where the ground prevented deep insertion of a larger rod, such as in a cave. 73s Roger G3XBM On 27 May 2010 14:13, John Bru
Hello LFers, I found this site while browsing and thought it might be of interest to those exploring earth electrodes: http://www.jolr.org/journal/documents/Volume_1_2008-36-jlr08-36.pdf I haven't re
Mal, No. It depends on the frequency. On 8970 Hz and lower it is an earth antenna. Mal, it was so often explained how an earth antenna works. Do we really have to repeat that each few weeks? Really?
However, they do use two synchronised transmitters, so the effective baseline becomes far greater. Now, how abot that for 8970Hz. Two stattion using low cost simple GPSDOs and similar DDS / s
Hi Chris, But how do you explain that i have crossed 49.6 km with a 600m spaced earth electrode antenna on 8970 Hz? It was rather summer time than winther (regarding QRN)! With the same antenna, my 1
Dear Roger, Andy, interesting thread - let me state a few thoughts here: - as far as I understand, the purpose of the dual array at the Clam Lake facility was to avoid the nulls in the coverage patte
HiStefan, Yes, but 600m is VERY long! The wire even laying on the ground I would expect to radiate quite well at 137 with that length! And how many watts?? ERP?? I am sure 8970 would do well through
Chris, LF, Am 14.12.2010 17:27, schrieb Chris: HiStefan, Yes, but 600m is VERY long! The wire even laying on the ground I would expect to radiate quite well at 137 with that length! And how many watt
Google "Project Sanguine" http://www.fas.org/nuke/guide/usa/c3i/fs_clam_lake_elf2003.pdf suggests more than 60km of cable used at 76Hz, so pro-rata not dissimiliar to 600m earth spacing at 9kHz
Stefan You now admit that your antenna is in FACT a LOSSY DIPOLE and not an earth antenna g3kev -- Original Message -- From: [email protected] Stefan Schäfer To: rsgb_lf_group@bla
Yes, I suppose over the whole radiating space all you're really doing is adding the total powers of the two or more statons. I suppose was really thinking long baselines leading to high gains - whi
Hi Mal, Yes, that is what I had concluded years ago. No harm in trying though! Further to your previous e-mail to LF, looks to me like beacons are now becoming the norm on 136/7kHz band and below. I
Stefan you are using a LOSSY dipole and not an earth mode antenna as you claim and what height above ground are the WIRES ? Are the wires running parallel or are they diagonal ? You and others are no
Stefan If your 600m wire is average 6 metres above the ground then you have an elevated grounded loop whose natural resonance is the length of wire plus the same length earth return plus 6 m vertical
