Return-Path: X-Spam-DCC: paranoid 1233; 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=-0.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,HTML_TITLE_EMPTY,RATWARE_GECKO_BUILD 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 t2E01TEI002670 for ; Sat, 14 Mar 2015 01:01:29 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YWZTd-0002Ck-EM for rs_out_1@blacksheep.org; Fri, 13 Mar 2015 23:58:49 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YWZTd-0002Cb-2u for rsgb_lf_group@blacksheep.org; Fri, 13 Mar 2015 23:58:49 +0000 Received: from mail-we0-f182.google.com ([74.125.82.182]) by relay1.thorcom.net with esmtps (TLSv1.2:AES128-GCM-SHA256:128) (Exim 4.85) (envelope-from <73dk7fc@googlemail.com>) id 1YWZTb-0001Ls-7g for rsgb_lf_group@blacksheep.org; Fri, 13 Mar 2015 23:58:47 +0000 Received: by wegp1 with SMTP id p1so2440771weg.1 for ; Fri, 13 Mar 2015 16:58:46 -0700 (PDT) X-DKIM-Result: Domain=googlemail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20120113; h=from:message-id:date:user-agent:mime-version:to:subject:references :in-reply-to:content-type; bh=Z/7T2NOR5ngZ0jG9Z1BJwIYklyhix++P7Wc1LRUw8RU=; b=S+QF3uMFVENfF3TNkxnamzTv66I8R9Mz04JyFYJsBAECTY65D5J1tpY57/vG4AGtZ5 CsgnvLAPqJzOV4Vp87e52d6gkYojSLMxlX/542aNCrMw4XWs5cWXXU6k5NeSC3tdQa5A XBKl67Vav+Z11EBo4TTUvMyo/aKKR60/5LDsphtWY4eQjVp6Smv8tuxxEcXiroOQwPcW TMs9EJ26ud58Ao8aDH/k2Qqr818cDc+YYAkD1rqlI4NW6NoCCQXrrqHMvE0NfHDJqtV0 1Wtf2cArusgdCmVal002nP5HB4NcM+jL7IXR4ZpEtcLE6jXgwo0/hOrkB3mcSuZdvyAW xA0w== X-Received: by 10.180.81.7 with SMTP id v7mr32142020wix.27.1426291126238; Fri, 13 Mar 2015 16:58:46 -0700 (PDT) Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de. [129.206.22.206]) by mx.google.com with ESMTPSA id dj5sm4808542wjb.28.2015.03.13.16.58.44 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 13 Mar 2015 16:58:45 -0700 (PDT) From: DK7FC <73dk7fc@googlemail.com> X-Google-Original-From: DK7FC <73dk7fc@gmail.com> Message-ID: <550379B3.4050502@gmail.com> Date: Sat, 14 Mar 2015 00:58:43 +0100 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <550344F5.1040409@lineone.net> <431CD2E1E8224D93B9A5FCBEE693A6AB@White> In-Reply-To: <431CD2E1E8224D93B9A5FCBEE693A6AB@White> X-Scan-Signature: 860e51ceecdf98b32e8eba101d9d472d Subject: LF: LF OP32 tonite Content-Type: multipart/alternative; boundary="------------080801030807080303070109" 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 2645 This is a multi-part message in MIME format. --------------080801030807080303070109 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Hugh, Right now there is someone transmitting OP32 on LF. I would assume you could detect him. Just give it a try :-) 73, Stefan Am 13.03.2015 21:31, schrieb Markus Vester: > Hi Hugh, > maybe there was no one transmitting... During the last couple of days, > both PSKreporter and opds-32 have been almost bare of LF Opera > spots, with the exception of a single RN3AGC sequence at 18:46 today. > Technically it could also be an exceptionally large deviation of the > soundcard samplerate (more than about 0.4%). But it seems unlikely as > you've been successful on other bands, and also tried different machines. > Best 73, > Markus (DF6NM) > > *From:* LineOne > *Sent:* Friday, March 13, 2015 9:13 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: No Opera decoding on 136kHz > > I haven't yet successfully decoded anything with Opera on 136khz in > spite of seeing some very big, clear signals on the waterfall display. > HF results are very satisfactory, especially on 30m. This problem > applies using any PC or laptop on the premises. > > The Rx is the Kenwood R5000 which produces some images below Long Wave > but sensitivity is quite good. I use a 136kHz bandpass filter with a > -60dB notch at 200kHz and better than -40dB for all frequencies above > that. The Rx filter is normally set to 2.1kHz USB and there is a useful > notch filter. > > There is a choice of antenna and preamps. One antenna is effectively a > sloper, 10M of open-wire feeder at 45 degrees connected to a horizontal > delta loop of about 140M total length. This can be used with the Tx > loading coil to tune, or a tuned preamp with about 20dB boost at 136khz. > The other is a 1m square of 10mm copper tube, broadly tuned into an > in-built +10dB preamp which will take about 200mVp-pk input before > clipping. The earth/ground system is extensive. > > Naturally an alternative receiver would be good but I have nothing > available, the FT817 and FT897 seem quite deaf at LF. Any suggestions > would be welcome, > > Hugh, M0DSZ. > > PS: I will probably be on 136khz this weekend with about 200W dc into a > linear amplifier but will note listening activity in case it's all > elsewhere. > --------------080801030807080303070109 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Hugh,

Right now there is someone transmitting OP32 on LF. I would assume you could detect him.
Just give it a try :-)

73, Stefan


Am 13.03.2015 21:31, schrieb Markus Vester:
Hi Hugh,
 
maybe there was no one transmitting... During the last couple of days, both PSKreporter and opds-32 have been almost bare of LF Opera spots, with the exception of a single RN3AGC sequence at 18:46 today.
 
Technically it could also be an exceptionally large deviation of the soundcard samplerate (more than about 0.4%). But it seems unlikely as you've been successful on other bands, and also tried different machines.
 
Best 73,
Markus (DF6NM)
  

From: LineOne
Sent: Friday, March 13, 2015 9:13 PM
Subject: LF: No Opera decoding on 136kHz

I haven't yet successfully decoded anything with Opera on 136khz in
spite of seeing some very big, clear signals on the waterfall display.
HF results are very satisfactory, especially on 30m. This problem
applies using any PC or laptop on the premises.

The Rx is the Kenwood R5000 which produces some images below Long Wave
but sensitivity is quite good. I use a  136kHz bandpass filter with a
-60dB notch at 200kHz and better than -40dB for all frequencies above
that. The Rx filter is normally set to 2.1kHz USB and there is a useful
notch filter.

There is a choice of antenna and preamps. One antenna is effectively a
sloper, 10M of open-wire feeder at 45 degrees connected to a horizontal
delta loop of about 140M total length. This can be used with the Tx
loading coil to tune, or a tuned preamp with about 20dB boost at 136khz.
The other is a 1m square of 10mm copper tube, broadly tuned into an
in-built  +10dB preamp which will take about 200mVp-pk  input before
clipping. The earth/ground system is extensive.

Naturally an alternative receiver would be good but I have nothing
available, the FT817 and FT897 seem quite deaf at LF. Any suggestions
would be welcome,

Hugh, M0DSZ.

PS: I will probably be on 136khz this weekend with about 200W dc into a
linear amplifier but will note listening activity in case it's all
elsewhere.

--------------080801030807080303070109--