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| Subject: | Re: LF: Ant current |
| From: | "Alan Melia" <[email protected]> |
| Date: | Sat, 1 Feb 2014 20:08:58 -0000 |
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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" <[email protected]> To: <[email protected]> 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 <[email protected]> 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 |
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