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1. Re: LF: Re: EARTH MODE (score: 1): Author: John Rabson <[email protected]>; Date: Mon, 19 Jul 2010 09:35:55 +0200; On a point of information, the aim with underground communications is to achieve a speech link over several hundred metres or more. The best I know of on 87 kHz is 1.6km two-way and 2.5km one-way in; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-07/msg00225.html (10,075 bytes)
2. LF: Re: EARTH MODE (score: 1): Author: Mike-WE0H <[email protected]>; Date: Sun, 18 Jul 2010 17:04:28 -0500; It's better to have an antenna no matter what shape or form it is rather than NOT having any antenna. We wont learn a thing if everyone would just use traditional antennas and never experiment with o; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-07/msg00380.html (9,669 bytes)

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