Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: Ferrite rod antenna - on-air testing

To: <[email protected]>
Subject: Re: LF: Ferrite rod antenna - on-air testing
From: "James Moritz" <[email protected]>
Date: Tue, 30 Aug 2011 20:09:37 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btopenworld.com; s=s1024; t=1314731318; bh=+kBWDMw1WN9ur94aHy3+U+Z7n4xFykmLS+J5vKaBFf0=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received: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=zn00s2wRbGKI9vCiq8Gv/UJjAVj51M3mrerxsD9NIpdZ7oCBkZ0oiaER3LpIYtMFwjLaXsrY5OnoOhv8tnbLbnlL/dHUH8MCnu3FHPWeDW3rx7h/7Bc8hZgP+2+dvxB0zl+IHzdJIGnhJW9g3cBiZjor6cf/Evo+M3WEejUdw5c=
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btopenworld.com; h=DKIM-Signature:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received: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=B/qqGreaA58orCma2fJjYVRpkb4PW/WDfBWUute2XxEq9P8uOWvlgh31IIpNUehUqKxH9i1l3b/+LYkGa10Ad9MnYGLgTO11citprVfeUQflIaLy3M+erIFSpq4Pa5zGyKW23xmP8ijybRFNLahnLe1qDi3idzcWkmSlUVxGzFo= ;
Domainkey-status: good (testing)
In-reply-to: <[email protected]>
References: <7B6D5F6A8CEE4E3CAB04E35F1F9E9732@JimPC> <[email protected]> <E1516299428D43FCA8D1E70AFBDFE1A1@JimPC> <[email protected]> <F0DFF70F1BC54B4E86E2C60ADB7CD092@JimPC> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]

Dear Stefan, Mal, LF Group,

Thanks for the QSOs earler this evening. DK7FC/P varied between RST349 and 559, and was generally a good readable signal on the ferrite rod antenna. The background noise level seemed to be slightly higher than during previous tests at the HF end of the band, and I found experimentally afterwards that there appeared to be some feeder-borne noise that could be reduced by around 5dB by connecting an isolating transformer into the ferrite rod coax. When this was done, the band noise appeared to be exceptionally low, and there was no noticeable difference in the noise floor between the ferrite rod and larger antennas. Stefan's /P receive setup is clearly a viable one if effective portable antennas are available, and an interesting solution to RX noise problems - especially when the weather is nice!

Cheers, Jim Moritz
73 de M0BMU




<Prev in Thread] Current Thread [Next in Thread>