Return-Path: X-Spam-DCC: paranoid 1102; 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, HTML_MESSAGE,RATWARE_GECKO_BUILD,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 u439ceKA018474 for ; Tue, 3 May 2016 11:38:40 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1axWhR-0004Gq-Ee for rs_out_1@blacksheep.org; Tue, 03 May 2016 10:33:01 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1axWhQ-0004Gh-Rw for rsgb_lf_group@blacksheep.org; Tue, 03 May 2016 10:33:00 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1axWhO-00025c-OA for rsgb_lf_group@blacksheep.org; Tue, 03 May 2016 10:32:59 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id DA6F120ACB for ; Tue, 3 May 2016 11:32:55 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qzbYz4c2yz5vNG for ; Tue, 3 May 2016 11:32:55 +0200 (CEST) Message-ID: <57287047.7000303@posteo.de> Date: Tue, 03 May 2016 11:32:55 +0200 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: <572619ED.1040402@posteo.de> <5727BB25.7020001@posteo.de> In-Reply-To: X-Scan-Signature: e21031ef48bbae1c5a8c64549547751e Subject: Re: LF: testing VLF grabber Content-Type: multipart/alternative; boundary="------------050901040307080305030204" 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: 7979 This is a multi-part message in MIME format. --------------050901040307080305030204 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello Max, Perfect. A nice progres! Am 03.05.2016 02:47, schrieb Max IK0VVE: > A perfect place could be the remote station of RCR-DX in monte Ripoli > near Tivoli (http://www.rcr-dx.eu/r-c-r-.html JN61JW) internet > connection 50Mbps UP/DW! But it is not so close to my home and I need > an hour and half or more to reach this place, if any problem occur I > could spend a day to solve it! So for now I would see some place nearby. Yes, a local site in just a few km distance is a very nice thing! And it may be better to have your own site, without any neighbours who could run a noisy power supply. When it's all your, then you can remove, replace, modify any QRM sources without discussions and compromises! Do you also plan to run it with solar power? My system has no problems any more since the end of February. And in winther there were a few things running sub-optimal since the project was very new to that time. > > Rick (IW4DXW) and Dom (IZ7SLZ) are each about 680 km far from me, the > first to North and the second to south east. Oh, that's very far. I rather expected something like 20 km. > I know Rick is transmitting in these hours. Hmm, he doesn't tell us. > > Yesterday I've chenged the RX antenna from 60 wires loop to the TX > (un-tuned) antenna of 630m, I've seen signals growing all over the band. What does that mean? An overloaded RX? With such a large antenna on the soundcard you will need a low pass filter. Simple RC chains would work well. Maybe 2x 10kOhm + 1nF. > So also this could be a point of discussion for the next remote > station. May a single turn loop antenna be good also for me? Yes sure. These days i am very convinced from loops. If you also want to use a Raspberry Pi for remote controlling the system, you can easily use some mono stabile relays to switch between different antennas, maybe 2 loops and an E field antenna. 73, all the best Stefan > > I'll keep the list updated about my grabbers. > > Thank and 73, Max IK0VVE > --------------050901040307080305030204 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello Max,

Perfect. A nice progres!

Am 03.05.2016 02:47, schrieb Max IK0VVE:
A perfect place could be the remote station of RCR-DX in monte Ripoli near Tivoli (http://www.rcr-dx.eu/r-c-r-.html JN61JW) internet connection 50Mbps UP/DW! But it is not so close to my home and I need an hour and half or more to reach this place, if any problem occur I could spend a day to solve it! So for now I would see some place nearby. 
Yes, a local site in just a few km distance is a very nice thing! And it may be better to have your own site, without any neighbours who could run a noisy power supply. When it's all your, then you can remove, replace, modify any QRM sources without discussions and compromises!
Do you also plan to run it with solar power? My system has no problems any more since the end of February. And in winther there were a few things running sub-optimal since the project was very new to that time.


Rick (IW4DXW) and Dom (IZ7SLZ) are each about 680 km far from me, the first to North and the second to south east.
Oh, that's very far. I rather expected something like 20 km.
I know Rick is transmitting in these hours.
Hmm, he doesn't tell us.

Yesterday I've chenged the RX antenna from 60 wires loop to the TX (un-tuned) antenna of 630m, I've seen signals growing all over the band.
What does that mean? An overloaded RX? With such a large antenna on the soundcard you will need a low pass filter. Simple RC chains would work well. Maybe 2x 10kOhm + 1nF.
So also this could be a point of discussion for the next remote station. May a single turn loop antenna be good also for me?
Yes sure. These days i am very convinced from loops.
If you also want to use a Raspberry Pi for remote controlling the system, you can easily use some mono stabile relays to switch between different antennas, maybe 2 loops and an E field antenna.

73, all the best
Stefan

I'll keep the list updated about my grabbers.

Thank and 73, Max IK0VVE

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