Return to KLUBNL.PL main page
| To: | <[email protected]> |
|---|---|
| Subject: | Re: LF: ON / F6CNI / P on MF |
| From: | "James Moritz" <[email protected]> |
| Date: | Wed, 14 Oct 2009 01:20:40 +0100 |
| Domainkey-signature: | a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:In-Reply-To:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=xRB31DcUe8/8kZ8Eo1E5gLrqY0QmzjlnqQwerRtd7h07n5QMj0lyPjyu5H6zEWgR4lk+CNa3+21FBv9bksNebfI9AiyzKc1+fhbGHrdMTvN4ewdSAmFffHQJiYjh3kFJGl9GKYu6lfpli6V5Q0wxo+5W/ZSECOyS2W0C1aYgBpA= ; |
| Domainkey-status: | good (testing) |
| In-reply-to: | <372276A0746748CEAEB6C24C08986671@AGB> |
| References: | <[email protected]> <372276A0746748CEAEB6C24C08986671@AGB> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
Dear Graham, LF Group, G0NBD wrote:...>Looks like these low long wires radiate quite well at 500 , the high angle seems to help the 'short' skip ? Well, 20m high is quite high compared to most amateur antennas in use on 500k - But doing a few sums, a 20m high, 150m long aerial should have radiation resistance of 1.5ohms or over, and one might expect several ohms loss resistance if in a good location. So efficiency could be in the tens of percent, and, being about 1/4 wave long, presumably not requiring much if anything in the way of loss-increasing loading coils. So even with just 5W TX, Andy could in principle be achieving a few watts ERP. Cheers, Jim Moritz 73 de M0BMU |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | LF: G3LDO in eastern Bavaria, hajo . brandt . dj1zb |
|---|---|
| Next by Date: | RE: LF: MOFMT ADSL noise, Laurence BY3A-KL1X China |
| Previous by Thread: | Re: LF: ON / F6CNI / P on MF, Graham |
| Next by Thread: | LF: beacon "BOJ" 137776.10 open, Claude Berthebaud |
| Indexes: | [Date] [Thread] [Top] [All Lists] |