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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 and all Just dumped the old BT 19th century land line for seriously fast Tooway Data Sat Broad band and can watch all the videos in Hi Def now. Just amazing footage of the Quad/Hex copters. Could one haul a wire ant to 7000ft? I guess you will try Stefan... Good luck! We will be listening.... 8kc/s? [...] 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 [212.82.108.207 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (m0fmt[at]yahoo.co.uk) 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: 3efbf4053c1a70bbeb6c0a0cc657f05e Subject: Re: LF: Quadrocopter antenna, sri, a bit OT Content-Type: multipart/alternative; boundary="856002529-1962113257-1375780909=:66400" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, TO_ADDRESS_EQ_REAL 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: 2613 --856002529-1962113257-1375780909=:66400 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable =0A=0AHi Stefan and all=0A=0AJust dumped the old BT 19th century land line = for seriously fast Tooway Data Sat Broad band and can watch all the videos = in Hi Def now.=0A=0AJust amazing footage of the Quad/Hex copters. Could one= haul a wire ant to 7000ft? I guess you will try Stefan... Good luck! We wi= ll be listening.... 8kc/s?=0A=0A=0A73 es GL Pete M0FMT IO91UX=0A=0A=0A>____= ____________________________=0A> From: Stefan Sch=E4fer =0A>To: rsgb_lf_group@blacksheep.org =0A>Sent: Tuesday,= 6 August 2013, 0:11=0A>Subject: Re: LF: Quadrocopter antenna, sri, a bit O= T=0A> =0A>=0A>=0A> =0A>Hi Warren, LF/VLF,=0A>=0A>I just found this: http:/= /www.youtube.com/watch?v=3DG3yR-GxD1is=A0 Take a=0Alook at it. I can't find= the words. I think i must have one :-)=0A>That must be SEVERAL 100m above = ground. I think we could even=0Ado VLF experiments with such a copter. Mayb= e a 500m vertical? I=0Aremember the weight of the wire in my 300m kite ante= nna test was about=0A1.5 kg, not more. So with 500m we could come lower tha= n 5.17 kHz, like=0Ai did in 2010/2011.=0A>=0A>73, Stefan/DK7FC=0A>=0A>=0A>A= m 06.08.2013 01:02, schrieb Warren Ziegler: =0A>Stefan, =0A>>=A0 =A0 But 10= 0m is not better than your kite experiments! =0A>>Yes you gain control but = not height.=A0 =0A>>You will still need a battery to land the quadcopter in= the=0Aevent of a failure of the power carrying wire. =0A>>=0A>> =0A>>=0A>>= =0A>>73 W =0A>>=0A>>=0A>>=0A>>On Mon, Aug 5, 2013 at 6:53 PM, Stefan=0ASc= h=E4fer wrote:=0A>>=0A>>Hi all, =0A= >>>=0A>>>I just gathered some informations from the web. Just one example f= or a,=0Aprobably, suitable hexacopter to carry a LF transmit antenna. =0A>>= >=0A>>>For example a DJI F550, see a video at http://www.youtube.com/watch?= v=3DveDrtdE6njo or http://www.youtube.com/watch?v=3D2QC9so2so3Y).=0ALooks l= ike they can easily=0Alift 1 kg! You can fly about 10 minutes with a 5.3 Ah= battery. The=0Abattery voltage is to 11.1V...14.8V. So the power consumpti= on may be=0A200...300 W ! With a compact SMPS on the copter and a 2 wire li= ne it=0Acould be possible to carry the antenna. And 100m is no problem too!= !=0A>>>I consider to buy one! And look this, most fascinating. http://www.y= outube.com/watch?v=3DJecyY79K7kY=0A>>>=0A>>>73, Stefan/DK7FC=0A>>>=0A>>>=0A= >>>Am 05.08.2013 15:25, schrieb Stefan Sch=E4fer: =0A>>>=0A>>>>Am 04.08.201= 3 17:52, schrieb DK1IS: =0A>>>>[...]But with nowadays quadrocopters=0Aand= =0Aa "little" reduction of the demands it should be possible to feed them= =0Afrom the ground with DC (or AC plus converters for reduction of=0Acurren= t) via 2 wire line and having a good antenna too.=0A>>>>>=0A>>>>>73,=0A>>>>= >Tom, DK1IS=0A>>>>> =0A>>>>That's it! So, Markus, could you ask your frien= d abot some technical=0Adetails? What is the supply voltage of the system a= nd power consumption=0A(or lifetime at a certain battery charge)? Is it pos= sible to lift 1 kg=0Aand how does it change the power consumption? It shoul= d be no problem=0Ato feed DC to the system or a compact power supply in the= sky and=0Anormal 230V mains at ground (todays PSUs have an input voltage r= ange of=0A85...240V AC, so a certain voltage drop on the thin wire should b= e no=0Aproblem.=0A>>>>Maybe you can do some tests?=0A>>>>=0A>>>>The advatag= es are clear. A quadrocopter keeps the position and height,=0Aeven in small= er wind blasts while a balloon bounces left and right. The=0Acosts of Heliu= m will quickly overcome the costs for a quadrocopter. Ah=0Aand such a proje= ct is simply more interesting i guess :-)=0A>>>>=0A>>>>73, Stefan/DK7FC=0A>= >>> =0A>>=0A>>=0A>>=0A>>=0A-- =0A>>73 Warren K2ORS=0A>>=A0 =A0 =A0 =A0 = =A0 =A0 =A0 =A0 WD2XGJ =0A>>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23=0A>>= =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2=0A>>=A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0 WE2XGR/1=0A>>=0A>>=A0 =0A>=0A> --856002529-1962113257-1375780909=:66400 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hi = Stefan and all
 
Just dumped the old BT 19th centu= ry land line for seriously fast Tooway Data Sat Broad band and can watch al= l the videos in Hi Def now.
 
Just amazing footage= of the Quad/Hex copters. Could one haul a wire ant to 7000ft? I guess you = will try Stefan... Good luck! We will be listening.... 8kc/s?

=
73 es GL Pete M0FMT IO91UX

From: Stefa= n Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>
To: rsgb_lf_group@blacksheep.org
<= b>Sent: Tuesday, 6 August 201= 3, 0:11
Subject: Re: L= F: Quadrocopter antenna, sri, a bit OT

=0A=0A=0A=0A =0A=0A
=0AHi = Warren, LF/VLF,
=0A
=0AI just found this: http://www.youtube.com/watch?v=3DG3yR-Gx= D1is  Take a=0Alook at it. I can't find the words. I think i must = have one :-)
=0AThat must be SEVERAL 100m above ground. I think w= e could even=0Ado VLF experiments with such a copter. Maybe a 500m vertical= ? I=0Aremember the weight of the wire in my 300m kite antenna test was abou= t=0A1.5 kg, not more. So with 500m we could come lower than 5.17 kHz, like= =0Ai did in 2010/2011.
=0A
=0A73, Stefan/DK7FC
=0A
=0A
=0AAm= 06.08.2013 01:02, schrieb Warren Ziegler:=0A
=0A =
Stefan,=0A
    But 100m is not better tha= n your kite experiments!
=0A
Yes you gain control but not height= . 
=0A
You will still need a battery to land the quadcopter= in the=0Aevent of a failure of the power carrying wire.
=0A
=0A
=0A

=0A
=0A
73 W
=0A
=0A
=0A
=0A
On Mon, Aug 5, 2013 at 6:53 PM, Stefan=0ASch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>=0Awr= ote:
=0A
=0A
=0AHi al= l,
=0A
=0AI just gathered some informations from the web. Just o= ne example for a,=0Aprobably, suitable hexacopter to carry a LF transmit an= tenna.
=0A
=0AFor example a DJI F550, see a video at=0A http://www.youtube.com/watch?v=3DveDrtdE6njo=0Aor=0A http://www.youtube.com/watch?v=3D2QC9so2so3Y).=0ALooks li= ke they can easily=0Alift 1 kg! You can fly about 10 minutes with a 5.3 Ah = battery. The=0Abattery voltage is to 11.1V...14.8V. So the power consumptio= n may be=0A200...300 W ! With a compact SMPS on the copter and a 2 wire lin= e it=0Acould be possible to carry the antenna. And 100m is no problem too!!=
=0AI consider to buy one! And look this, most fascinating.=0A http://www.youtube.com/watch?v=3DJecyY79K7kY
=0A
= =0A73, Stefan/DK7FC
=0A
=0A
=0AAm 05.08.2013 15:25, schrie= b Stefan Sch=E4fer:=0A

=0AAm 04.08.2013 1= 7:52, schrieb DK1IS:=0A
=0A
[...= ]But with nowadays quadrocopters=0Aand=0Aa "little" reduction of the demand= s it should be possible to feed them=0Afrom the ground with DC (or AC plus = converters for reduction of=0Acurrent) via 2 wire line and having a good an= tenna too.
=0A
=0A73,
=0ATom, DK1IS
=0A
= =0A
=0A
=0AThat's it! So, Markus, could you ask = your friend abot some technical=0Adetails? What is the supply voltage of th= e system and power consumption=0A(or lifetime at a certain battery charge)?= Is it possible to lift 1 kg=0Aand how does it change the power consumption= ? It should be no problem=0Ato feed DC to the system or a compact power sup= ply in the sky and=0Anormal 230V mains at ground (todays PSUs have an input= voltage range of=0A85...240V AC, so a certain voltage drop on the thin wir= e should be no=0Aproblem.
=0AMaybe you can do some tests?
=0A =0AThe advatages are clear. A quadrocopter keeps the position and height,= =0Aeven in smaller wind blasts while a balloon bounces left and right. The= =0Acosts of Helium will quickly overcome the costs for a quadrocopter. Ah= =0Aand such a project is simply more interesting i guess :-)
=0A =0A73, Stefan/DK7FC
=0A
=0A
=0A =0A
=0A
=0A
=0A

=0A
=0A-- =
=0A73 Warren K2ORS
=0A            &nbs= p;   WD2XGJ
=0A              &n= bsp; WD2XSH/23
=0A               = ; WE2XEB/2
=0A                WE= 2XGR/1
=0A
=0A =0A
=0A
=0A
=0A=0A

--856002529-1962113257-1375780909=:66400--