Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md02.r1000.mx.aol.com (Internet Inbound) with ESMTP id A375E3800008D; Sun, 2 Oct 2011 07:24:23 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RAK90-0005sy-RV for rs_out_1@blacksheep.org; Sun, 02 Oct 2011 12:23:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RAK90-0005sp-9P for rsgb_lf_group@blacksheep.org; Sun, 02 Oct 2011 12:23:42 +0100 Received: from eterpe-smout.broadpark.no ([80.202.8.16]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RAK8y-0001nS-MW for rsgb_lf_group@blacksheep.org; Sun, 02 Oct 2011 12:23:42 +0100 MIME-version: 1.0 Received: from terra-smin.broadpark.no ([80.202.8.13]) by eterpe-smout.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTP id <0LSF00F7CRNAHQ30@eterpe-smout.broadpark.no> for rsgb_lf_group@blacksheep.org; Sun, 02 Oct 2011 13:23:34 +0200 (CEST) Received: from [127.0.0.1] ([84.48.126.198]) by terra-smin.broadpark.no (Sun Java(tm) System Messaging Server 7u3-15.01 64bit (built Feb 12 2010)) with ESMTPA id <0LSF00L4VRN9SA10@terra-smin.broadpark.no> for rsgb_lf_group@blacksheep.org; Sun, 02 Oct 2011 13:23:34 +0200 (CEST) Message-id: <4E8849B5.7080800@broadpark.no> Date: Sun, 02 Oct 2011 13:23:33 +0200 From: Steinar Aanesland User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 To: rsgb_lf_group@blacksheep.org References: <4E884159.4050006@broadpark.no> In-reply-to: <4E884159.4050006@broadpark.no> X-Forwarded-Message-Id: <4E884159.4050006@broadpark.no> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Subject: LF: A test of cmsk on "the dreamers band" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:466859072:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60564e8849e704c4 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hi all, I am new to the group and on top of that Norwegian so please be nice to me, my English is not the best. The last few days I've been doing some digi mode testing at 8.97 khz; "dreamers band", mostly with use of the QRSS mode. On the transmitter side, I have been using a 5 turn 10 x 10 m antenna and an audio amplifier 100W. The system is feeded with a signal from the program "Spectrum Lab". On the receiver side, I have been using a 70 x 70 cm 60 turns loop, tuned with a capacitor. The loop was connected to the microphone input on my laptop and decoded with "Spectrum Lab". The result has been interesting . With this simple arrangement, I have reach a distance of 2.5 km. Yesterday I tried out CMSK8 made by ZL1BPU Murray. I had to make some changes in the ini-file to get the CMSK work om 8.97khz. The sampling rate was adjusted with the program CheckSR and the transmitting frequency was set to 8970Hz. Waterfall has a 2000Hz limit so this was black and useless on 8790Hz. It would makes it easier to track the signal if the developer could extend waterfall to 10 kHz. I am aware that one can get the view of the waterfall by going down in frequency, but 8.97khz has become a de facto water hole of VLF . The result was exciting. A clean copy of the signal was received at about 2 km. I would also try to test out some of the VLF mode in multipsk , especially PSK10 and PSKAM10, but I have not find a way to fool the program to work on 8.97Khz yet. 73 and good dx the VLF Steinar la5vna