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| To: | <[email protected]> |
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| Subject: | Re: LF: 9kHz without high voltage |
| From: | "James Moritz" <[email protected]> |
| Date: | Mon, 1 Mar 2010 20:58:34 -0000 |
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Dear Graham, LF Group,Well, scaling the 12 inch diameter coil on 160m would require about a 60 metre diameter coil at 9kHz, so still quite "challenging". It would need an impressive no-entry sign too ;-) I think you are referring to the toroidal antennas invented by Prof. Roger Jennison (G2AJV - now sadly SK). There is an article at http://www.physics.princeton.edu/~mcdonald/examples/EM/jennison_cq_23_summer_95.pdf and many others. Cheers, Jim Moritz 73 de M0BMU----- Original Message ----- From: "Graham" <[email protected]> To: <[email protected]> Sent: Monday, March 01, 2010 7:56 PM Subject: Re: LF: 9kHz without high voltage Making a Torodial antenna, as presented at the Egham HFC would be a good start .. |
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