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| To: | [email protected] |
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| Subject: | Re: LF: 500 kHz loop antenna ? |
| From: | John Andrews <[email protected]> |
| Date: | Fri, 11 May 2007 13:47:55 +0000 |
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| In-reply-to: | <20070511095015.6B25E2E68F3@smtps01> |
| References: | <001e01c7933b$4ae4a340$fe79a8c0@PCVONWALTER> <[email protected]> <20070511095015.6B25E2E68F3@smtps01> |
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Rik,Just a little interesting information... My 1159 m^2 loop shows a feedpoint impedance of 1.8 +j215 ohms at 137 kHz. It measures 53 +j1060 ohms at 505 kHz. If the FCC ever grinds out a license for me to operate on 600 meters, then the tuning network will certainly be simple! That loop requires about 500 watts for a measured 1 watt ERP at 137 kHz. It will be interesting to see how it does at 600m. Since the perimeter of the loop is about a quarter wave up there, "small loop" thinking will probably not apply. I believe that Dave Riley, AA1A, has used a vertical loop on 505 kHz with good results. John Andrews, W1TAG Rik Strobbe wrote: Dear all, did anyone try a loop antenna (for transmitting) on 500 kHz ? |
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