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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Re: Re: 500/137 XBAND QSO |
| From: | Rik Strobbe <[email protected]> |
| Date: | Mon, 15 Dec 2008 23:00:06 +0100 |
| In-reply-to: | <[email protected]> |
| References: | <002901c95e97$87b3f400$0301a8c0@mal769a60aa920> <004001c95ea5$b34c32e0$8d01a8c0@JAYDELL> <006601c95ea8$c07ffde0$0301a8c0@mal769a60aa920> <[email protected]> <009001c95ed1$feba2e40$0301a8c0@mal769a60aa920> <[email protected]> <00b201c95ee2$813c91e0$0301a8c0@mal769a60aa920> <[email protected]> <[email protected]> |
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John, > 1/4 wave inv L at over 100 ft high.The radiation resistance of this antenna must be about 5 Ohm, with a loss resistance of 20 Ohm the efficiency is 25%.So I guess a TX power no greater than 4W would be sufficient to meet the 1W ERP limit? If you take the gain of a marconi antenna over a dipole into account 2.2W would do the job. 73, Rik ON7YD Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm |
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