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| To: | [email protected] |
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| Subject: | Re: LF: Re: Re: 500/137 XBAND QSO |
| From: | John P-G <[email protected]> |
| Date: | Mon, 15 Dec 2008 21:49:25 +0000 |
| 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]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
On Mon, 15 Dec 2008 21:40:48 +0100 Rik Strobbe <[email protected]> wrote: > > 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? A super efficient, optimally tuned Class-E single-FET amplifier capable of the necessary power would indeed fit in your pocket. However, we still wait for some technical details of this super QRP DX transmitter.... and wait.... and wait.... Like the man himself said "What some claim and what they do is a different thing, do not believe everything you hear." John GM4SLV |
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