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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: VLF_8.79 kHz |
| From: | Jacek Lipkowski <[email protected]> |
| Date: | Tue, 23 Feb 2010 10:05:54 +0100 (CET) |
| In-reply-to: | <38A51B74B884D74083D7950AD0DD85E82A1B10@File-Server-HST.hst.e-technik.tu-darmstadt.de> |
| References: | <[email protected]> <38A51B74B884D74083D7950AD0DD85E82A1B0C@File-Server-HST.hst.e-technik.tu-darmstadt.de> <38A51B74B884D74083D7950AD0DD85E82A1B10@File-Server-HST.hst.e-technik.tu-darmstadt.de> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Those looking at vlf transmission should look at cave radio electronics, tens of kHz are used for communication and several kHz for beaconing. The antenna limitations aremuch greater than for radioamateur use. Brian Pease has a nice site: http://radiolocation.tripod.com/ He uses a 4kHz beacon with a very small antenna to cover several hundred meters via rock. The DQ receiver design is also worth a look. VY 73 Jacek / SQ5BPF |
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