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The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Why? I think its possible that frozen ground increases the efficincy of a given system, but that same antenna conguration would probably work even better still over salt water?? Alan G3NYK ----- Original Message ----- From: "C. Groeger" To: Sent: Saturday, February 01, 2014 3:18 PM Subject: Re: LF: Ant current [...] Content analysis details: (0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.20.0.128 listed in list.dnswl.org] 0.2 STOX_REPLY_TYPE STOX_REPLY_TYPE 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: ac0f6ff1af52b6036ac1f4fe0c2bd52c Subject: Re: LF: Ant current Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=FORGED_MUA_OUTLOOK autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Why? I think its possible that frozen ground increases the efficincy of a given system, but that same antenna conguration would probably work even better still over salt water?? Alan G3NYK ----- Original Message ----- From: "C. Groeger" To: Sent: Saturday, February 01, 2014 3:18 PM Subject: Re: LF: Ant current > Thanks for quick reply, Wolf! > > But then propagation from a mf tx on a ship on sea should be worse then > from land? > > Christian Groeger > > wolf_dl4yhf schrieb: > >>Hi Chris, >> >>By coincidence, I just had to re-adjust the antenna for exactly that >>reason: >> >>The conductivity of water is better, but the 'tangens delta' (loss >>factor) of water as dielectric is much worse than that of ice. >>So the water "robs" energy in presence of an E-field, which the ice does >>not. >>Thus the losses around the antenna go up. Depends a lot of the greenery >>around the antenna. >> >>Cheers, >> Wolf DL4YHF . >> >>Am 01.02.2014 15:51, schrieb C. Groeger: >>> Hi all >>> How can one explain that ant current rises when soil is frozen? >>> >>> Conductivity of water should be much higher than that of ice. >>> >>> So earth resistance would be higher and the current should drop when >>> soil is frozen... >>> >>> 73, df5qg >>> >>> >>> Christian Groeger >> >> >