Return-Path: X-Spam-DCC: paranoid 1170; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, 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 tBG0EXx7025604 for ; Wed, 16 Dec 2015 01:14:33 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a8za8-00008Z-Nl for rs_out_1@blacksheep.org; Wed, 16 Dec 2015 00:04:36 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a8za8-00008Q-0A for rsgb_lf_group@blacksheep.org; Wed, 16 Dec 2015 00:04:36 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1a8zZ4-0007CY-V1 for rsgb_lf_group@blacksheep.org; Wed, 16 Dec 2015 00:04:34 +0000 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 789E5209E7 for ; Wed, 16 Dec 2015 01:03:13 +0100 (CET) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3pKxVn1m7rz5vN5 for ; Wed, 16 Dec 2015 01:03:13 +0100 (CET) Message-ID: <5670AA40.7020206@posteo.de> Date: Wed, 16 Dec 2015 01:03:12 +0100 From: DK7FC 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: <44960D15E9F74D8DBBE05E8A24298450@AGB> <1422413C99FE494EA95C4A94103353A8@AGB> In-Reply-To: <1422413C99FE494EA95C4A94103353A8@AGB> X-Scan-Signature: 3b8620872b19e25fb6f4dfaf1256edc3 Subject: LF: DK7FC remote forest grabber now running Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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: 5814 Hi all, Finally my new remote forest grabber, version 2.0, is now active in JN49ik36! There, in a radius of 1000m, there is no electricity. The new version uses the new Raspberry Pi 2 which performs much better. The overall power consumption of the system is below 3W. The stereo RF stream is stable and the CPU load is just about 22%. There are 3 lead acid gel accus, 18 Ah each. In the last weeks i finished the last important steps. -Installed the (first) 50W solar module in an angle of 60 deg (winter optimised) -Installed the accu charger circuit which has a variable voltage limiting depending on the accu temperature (PTC sensores installed) -Put the stereo MF DC converter into the box -Painted the WLAN yagi in military green, camouflage-antenne :-) -Installed scripts to track the battery voltage, WLAN link level and CPU temperature - Updated the grabbers website, http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_remote_Grabber.html So far, there is only one antenna on the tree. A loop for 630m, beaming NW/SE. Seems to work well from what i saw so far. However there is still QRM coming from the far field. Some QRM traces are visible on the DL3ZID grabber in > 500 km distance. Maybe there is some noise from the DC/DC converter, not sure. Will check that later. You can't imagine the feeling beeing up on the tree there. Its just peace and freedom! Worth all the "effort". Some images at https://www.dropbox.com/sh/iogg0azyaezrg0y/AADJGvxaq4OEJuNYZ2YyfP_Ca?dl=0 (beeing not happy with seafile as an alternative for dropbox. Will try owncloud soon) Next steps are: -Building a second loop, orthogonal, for MF. -Building an active antenna for LF/MF. A power saving model, running at 5V/1mA! -Starting with first steps for 2200m! -Installing a web-cam. -Further crazy ideas... 73, Stefan