Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u28G9dUU032237 for ; Tue, 8 Mar 2016 17:09:40 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1adK8X-0002fG-If for rs_out_1@blacksheep.org; Tue, 08 Mar 2016 16:05:29 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1adK8X-0002f7-6O for rsgb_lf_group@blacksheep.org; Tue, 08 Mar 2016 16:05:29 +0000 Received: from mail-vk0-x22a.google.com ([2607:f8b0:400c:c05::22a]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.86) (envelope-from ) id 1adK8S-0005gh-5W for rsgb_lf_group@blacksheep.org; Tue, 08 Mar 2016 16:05:28 +0000 Received: by mail-vk0-x22a.google.com with SMTP id e6so22015106vkh.2 for ; Tue, 08 Mar 2016 08:05:23 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to; bh=V/uKHj/Z1cdRepYV0nJCBuPkr+wG6bDRtJDm7X0lgsM=; b=kGDovmSdxdwf0eb0oJiSoqMknM6t2B9jmd4ozm9cm5NSIou80dBfIrDm7lI1Va5xva vYZGd/gYEDULg0DzmhYnvnh0v2zVjwzEhfaic/9B2r2RUghd/xs1a8e/7ayCYwNDi1UX Sf3M5Y8BRUvF5l9l+Had59vHFuG9iFCKfYstdXY+bIVSRYENw9SsyN8EIf6W3KhVCnUe QAEawynNnnCqvkvVSi9gT5LTsaEIszdHTgrTETRgZowBkh+L2U19YKs7/UYkjmFoouLF noXvg5GJLjTdhuM+wH5XHuifhC5Z9buJgmliXWMs4ccInGGR+CeAp4JAz5KhGCjNYe9A 0eqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to; bh=V/uKHj/Z1cdRepYV0nJCBuPkr+wG6bDRtJDm7X0lgsM=; b=b7Sv7RtiGpj6iQkEXKRTn5jH3TRY6e8lmpbn+UWVGYSIBXC5N/MQ9hEVhlAG7LYmYg vmrREdEtaa7I9MMgAhM0pCoP1MM3ehrDQUqef7onRMjo7rNULDEGJsC59hCbsG1sgS2N xRYRh82xlUO86pBpvqBtaJyIO8UMx7oIyZh623Ahiyu7APewC03NDuWK3FnBEC1PFYhW TD+lyZarZGbJiJES7jB8mRyafql+JLMz+sByjchK0xK9ge3DDLLTPBusw/jdNwxh4tLn XbWLc9lmVUKDGLAuIzV2p+y8aaYKxWi3mFwOeAGyGqw8ebzWQ1Hy7MwfhGqzHLSWC+kz m86Q== X-Gm-Message-State: AD7BkJLPEPgOiEgR6CtM3xVSy9UAoJ0+nQpD1EbhSRSCCHhA3/vIUQn5VPMNiGJy1Raexlvl7cA9OrjbVIxajQ== MIME-Version: 1.0 X-Received: by 10.31.48.132 with SMTP id w126mr27978928vkw.5.1457453122199; Tue, 08 Mar 2016 08:05:22 -0800 (PST) Received: by 10.159.32.198 with HTTP; Tue, 8 Mar 2016 08:05:22 -0800 (PST) In-Reply-To: <6D61ED7030E54FB69566773E90156608@gnat> References: <56DB3FC7.22052.7963D3@roelof.ndb.demon.nl> <56DEE5AA.32359.3F8891@roelof.ndb.demon.nl> <6D61ED7030E54FB69566773E90156608@gnat> Date: Tue, 8 Mar 2016 16:05:22 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Scan-Signature: 9bd342c7d74bc0c7d15d59c1164ca995 Subject: Re: LF: VO1NA CW 477.7 kHz Content-Type: multipart/alternative; boundary=001a11430e0ea038a4052d8bbfae X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7264 --001a11430e0ea038a4052d8bbfae Content-Type: text/plain; charset=UTF-8 What is needed, is a software package that runs in parallel, monitoring and recoding the noise level. It would have to work in a manner that was unaffected by the presence of signals, and also on a receiver without AGC. Basic software techniques could sort out the first issue (see my piece in the the latest RadCom -plus) and sort noise from narrowband signals. Any AGC action could still upset things Andy G4JNT On 8 March 2016 at 14:59, Alan Melia wrote: > Hi Roelof, thank you for those comments, that was my feeling but there is > so much recorded informationI thought it was worth a look and sticking my > neck out to see if anyone would say I was all wrong :-)) > > Yes for preference I would use a continuous carrier/signal but that is not > always possible. > > Thanks and Best Wishes > Alan > G3NYK > ----- Original Message ----- From: "Roelof Bakker" > To: ; > Sent: Tuesday, March 08, 2016 2:46 PM > Subject: Re: LF: VO1NA CW 477.7 kHz > > > Hello all, >> >> Attached last night's reception of VO1NA. >> Between 01:15 and 01:25 UTC, marginal aural copy was possible in CW >> mode and good aural copy in Linrad's coherent mode. >> As can be seen, the band noise is much lower than the previous >> night. >> >> Alan, regarding the use of WSPR for propagation study, due to the >> rapid fading on 475 kHz, a continuous signal is called for and most >> WSPR stations don't provide this. >> >> The S/N indication of WSPR is nice, but useless for propagation >> study as the background noise shows a lot of variation over the >> course of the night and from night to night as can be seen in my >> overnight Linrad fast playback screen shots. >> >> Best regards, >> Roelof >> ==================================================================== >> From: Roelof Bakker, PAoRDT >> Location: Middelburg, Zealand SW Netherlands, 51 30 02 N, 03 36 02 E >> Locator: JO11tm >> Receiver hardware: Afedri SDR >> Receiver software: Linrad >> Aerial: pa0rdt-mini-whip, 5 metre up in a hawthorn tree. >> ==================================================================== >> >> >> >> >> > > > -------------------------------------------------------------------------------- > > > The following section of this message contains a file attachment >> prepared for transmission using the Internet MIME message format. >> If you are using Pegasus Mail, or any other MIME-compliant system, >> you should be able to save it or view it from within your mailer. >> If you cannot, please ask your system administrator for assistance. >> >> ---- File information ----------- >> File: VO1NA20160308.gif >> Date: 8 Mar 2016, 15:06 >> Size: 138310 bytes. >> Type: GIF-image >> >> > > --001a11430e0ea038a4052d8bbfae Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
What is needed, is a software package that runs in paralle= l, monitoring and recoding the noise level.=C2=A0 It would have to work in = a manner that was unaffected by the presence of signals, and also on a rece= iver without AGC.

Basic software techniques could sort o= ut the first issue (see my piece in the the latest RadCom -plus) and sort n= oise from narrowband signals.=C2=A0 Any =C2=A0AGC action could still upset = things

Andy =C2=A0G4JNT

=

On 8 March 2016 a= t 14:59, Alan Melia <alan.melia@btinternet.com> wrot= e:
Hi Roelof, thank you for those comment= s, that was my feeling but there is so much recorded informationI thought i= t was worth a look and sticking my neck out to see if anyone would say I wa= s all wrong :-))

Yes for preference I would use a continuous carrier/signal but that is not = always possible.

Thanks and Best Wishes
Alan
G3NYK
----- Original Message ----- From: "Roelof Bakker" <roelof@ndb.demon.nl><= br> To: <jcraig@mun.ca>; <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, March 08, 2016 2:46 PM
Subject: Re: LF: VO1NA CW 477.7 kHz


Hello all,

Attached last night's reception of VO1NA.
Between 01:15 and 01:25 UTC, marginal aural copy was possible in CW
mode and good aural copy in Linrad's coherent mode.
As can be seen, the band noise is much lower than the previous
night.

Alan, regarding the use of WSPR for propagation study, due to the
rapid fading on 475 kHz, a continuous signal is called for and most
WSPR stations don't provide this.

The S/N indication of WSPR is nice, but useless for propagation
study as the background noise shows a lot of variation over the
course of the night and from night to night as can be seen in my
overnight Linrad fast playback screen shots.

Best regards,
Roelof
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
From: Roelof Bakker, PAoRDT
Location: Middelburg, Zealand SW Netherlands, 51 30 02 N, 03 36 02 E
Locator: JO11tm
Receiver hardware: Afedri SDR
Receiver software: Linrad
Aerial: pa0rdt-mini-whip, 5 metre up in a hawthorn tree.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D






---------------------------------------------------------------------------= -----


The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

=C2=A0 ---- File information -----------
=C2=A0 =C2=A0 File:=C2=A0 VO1NA20160308.gif
=C2=A0 =C2=A0 Date:=C2=A0 8 Mar 2016, 15:06
=C2=A0 =C2=A0 Size:=C2=A0 138310 bytes.
=C2=A0 =C2=A0 Type:=C2=A0 GIF-image




--001a11430e0ea038a4052d8bbfae--