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[195.171.43.25]) by mx.google.com with ESMTP id i10si6547616laf.44.2013.08.08.13.18.02 for ; Thu, 08 Aug 2013 13:18:03 -0700 (PDT) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org; dkim=pass header.i=@mx.aol.com Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1V7Wdo-0005Ye-5Y for rs_out_1@blacksheep.org; Thu, 08 Aug 2013 21:17:00 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1V7Wdn-0005YS-Kv for rsgb_lf_group@blacksheep.org; Thu, 08 Aug 2013 21:16:59 +0100 Received: from omr-m06.mx.aol.com ([64.12.143.80]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1V7Wdl-0006rJ-3L for rsgb_lf_group@blacksheep.org; Thu, 08 Aug 2013 21:16:58 +0100 Received: from mtaout-da04.r1000.mx.aol.com (mtaout-da04.r1000.mx.aol.com [172.29.51.132]) by omr-m06.mx.aol.com (Outbound Mail Relay) with ESMTP id A7C3D700308C8 for ; Thu, 8 Aug 2013 16:16:54 -0400 (EDT) Received: from White (95-91-237-73-dynip.superkabel.de [95.91.237.73]) by mtaout-da04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id C5906E00008A for ; Thu, 8 Aug 2013 16:16:51 -0400 (EDT) Message-ID: <2D8E764F8D76417B9A12E0A2C1904E87@White> From: "Markus Vester" To: References: <5202DE92.4040507@virginbroadband.com.au> <001101ce9428$e14548e0$0201a8c0@marco09cqcdi12> <5203E4A3.5050409@iup.uni-heidelberg.de> Date: Thu, 8 Aug 2013 21:45:15 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1375993014; bh=aYjwu2L/Q3GkxXZSSvhBCewU1lMovZDQw/fCzKlhSD0=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=dez+IctdPV9rVbTik6ZX0TeYnjcv+GApZuiWBhy81AabkLwJmARfBxpMwdnxtafG1 lwIULZGyz+V922QkyH0axO7F0t+JliVciXQI+uLv0/t2PN/A7ibngkhpAphEa3W+7s fUweulZqnvMGHMNXLQa6s+M6s7DDTZmsN7gbvLtI= x-aol-sid: 3039ac1d33845203fcb345f4 X-AOL-IP: 95.91.237.73 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Stefan, maybe such a multicopter could be proposed as a worthwhile investment for your university institute? Measuring CO concentration at various altitudes, taking air probes, wind profiles and turbulence, you name it - all environmental physics! And of course you'd be the one designing and testing the telemetry system ;-) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [64.12.143.80 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: f45514038df04b1035abb1d5446da941 Subject: Re: LF: Re: [OT] Quadrocopter antenna Content-Type: multipart/alternative; boundary="----=_NextPart_000_000B_01CE9480.915032C0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 Status: O X-Status: X-Keywords: X-UID: 2912 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_000B_01CE9480.915032C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, maybe such a multicopter could be proposed as a worthwhile investment = for your university institute? Measuring CO concentration at various = altitudes, taking air probes, wind profiles and turbulence, you name it = - all environmental physics! And of course you'd be the one designing = and testing the telemetry system ;-) Best 73, Markus From: Stefan Sch=E4fer=20 Sent: Thursday, August 08, 2013 8:34 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: Re: [OT] Quadrocopter antenna Hi Marco, Am 08.08.2013 13:17, schrieb Marco Cadeddu: > Beyond my concerns, my congrats in advance if somebody will try it! > > 73 de Marco IK1HSS Yesterday i had a phone call to a German shop who sells that DJI F550=20 hexacopter. I got some more technical deteils and prices. Without the=20 camera option, just the flying hexacopter, LiPo accus, remote control,=20 GPS navigation + sensors, 2.4 GHz link hardware, charging station, the=20 costs are in the range of 1000 EUR. That is more expensive than my car (10 years ago)! :-) Of course it would be most fascinating, not only for amateur radio=20 experiments. Anyway i still fight with myselfe if i should invest so=20 much money for that stuff. On the other side i'm dreaming (!) ;-) about a 500m vertical or so.=20 Think about a MF transmitter that is connected to an antenna wire of=20 variable length. The ground losses are low, maybe here on the top of the = building. An amperemeter is already connected. The current is low,=20 first. Then you start the hexacopter and start to lift it. The wire is=20 rolled up and connected at the far end. Then the height reaches lambda/4 = and you can suddenly see the antenna current rising :-) As long as the=20 system is running on batteries only, one could use a simple=20 non-conducting line, say 20m long. Guess there will be no EMS problems=20 then. A power supply from the ground is a complete differnt thing. Could it be possible to rise a lambda/4 for 2200m? I have an idea: You will buy the equipment and i do the experiments, for = you, and will inform you about the results! :-) 73, Stefan/DK7FC ------=_NextPart_000_000B_01CE9480.915032C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Stefan,
 
maybe such a multicopter could be = proposed as a=20 worthwhile investment for your university institute? Measuring CO=20 concentration at various altitudes, taking air probes, wind = profiles and=20 turbulence, you name it - all environmental physics! And of course you'd = be the=20 one designing and testing the telemetry system ;-)
 
Best 73,
Markus
 

From: Stefan = Sch=E4fer
Sent: Thursday, August 08, 2013 8:34 PM
Subject: Re: LF: Re: [OT] Quadrocopter = antenna

Hi Marco,

Am 08.08.2013 13:17, schrieb Marco=20 Cadeddu:
> Beyond my concerns, my congrats in advance if somebody = will try=20 it!
>
> 73 de Marco IK1HSS

Yesterday i had a phone = call to a=20 German shop who sells that DJI F550
hexacopter. I got some more = technical=20 deteils and prices. Without the
camera option, just the flying = hexacopter,=20 LiPo accus, remote control,
GPS navigation + sensors, 2.4 GHz link = hardware,=20 charging station, the
costs are in the range of 1000 EUR.
That is = more=20 expensive than my car (10 years ago)! :-)
Of course it would be most=20 fascinating, not only for amateur radio
experiments. Anyway i still = fight=20 with myselfe if i should invest so
much money for that = stuff.

On the=20 other side i'm dreaming (!) ;-) about a 500m vertical or so.
Think = about a=20 MF transmitter that is connected to an antenna wire of
variable = length. The=20 ground losses are low, maybe here on the top of the
building. An = amperemeter=20 is already connected. The current is low,
first. Then you start the=20 hexacopter and start to lift it. The wire is
rolled up and connected = at the=20 far end. Then the height reaches lambda/4
and you can suddenly see = the=20 antenna current rising :-) As long as the
system is running on = batteries=20 only, one could use a simple
non-conducting line, say 20m long. = Guess there=20 will be no EMS problems
then. A power supply from the ground is a = complete=20 differnt thing.

Could it be possible to rise a lambda/4 for=20 2200m?

I have an idea: You will buy the equipment and i do the=20 experiments, for
you, and will inform you about the results! = :-)

73,=20 Stefan/DK7FC

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