Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w64H5LWK031024 for ; Wed, 4 Jul 2018 19:05:24 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fal3x-0007wg-T3 for rs_out_1@blacksheep.org; Wed, 04 Jul 2018 17:55:29 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fal0X-0007wP-Qg for rsgb_lf_group@blacksheep.org; Wed, 04 Jul 2018 17:51:57 +0100 Received: from out3-22.antispamcloud.com ([185.201.18.22]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fal0O-0005xe-Bu for rsgb_lf_group@blacksheep.org; Wed, 04 Jul 2018 17:51:50 +0100 Received: from 132.178.216.87.static.jazztel.es ([87.216.178.132] helo=servigilant.vigilant.es) by mx62.antispamcloud.com with esmtpsa (TLSv1:ECDHE-RSA-AES128-SHA:128) (Exim 4.89) (envelope-from ) id 1fal0I-0007CE-Fl for rsgb_lf_group@blacksheep.org; Wed, 04 Jul 2018 18:51:44 +0200 Received: from servigilant.vigilant.local ([fe80::c40d:8140:d722:5448]) by servigilant.vigilant.local ([fe80::c40d:8140:d722:5448%13]) with mapi id 14.03.0123.003; Wed, 4 Jul 2018 18:51:37 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Subject: RE: LF: RE: Summer games / EARTH ANTENNAS Thread-Topic: LF: RE: Summer games / EARTH ANTENNAS Thread-Index: AQHUEvconOk87ZB6i0mqX/m3jNJOP6R9wA+AgAAl0ICAAWEdoA== Date: Wed, 4 Jul 2018 16:51:35 +0000 Message-ID: <6DB8451D7F3D3947A5918808A59621EA08524F3A@servigilant.vigilant.local> References: , , <5B38A763.17452.850587@roelof.ndb.demon.nl> <5B3BB75F.9030305@posteo.de> <000601d41303$c6719870$5354c950$@go2.pl> <5B3BEDA5.9050902@posteo.de> In-Reply-To: <5B3BEDA5.9050902@posteo.de> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.22] Content-Type: multipart/alternative; boundary="_000_6DB8451D7F3D3947A5918808A59621EA08524F3Aservigilantvigi_" MIME-Version: 1.0 X-Originating-IP: 87.216.178.132 X-AntiSpamCloud-Domain: vigilant.es X-AntiSpamCloud-Username: smtpsolarwinds Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=smtpsolarwinds@vigilant.es X-AntiSpamCloud-Outgoing-Class: ham X-AntiSpamCloud-Outgoing-Evidence: Combined (0.22) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5t0/7r6G3OEujsLJFXb9nxd602E9L7XzfQH6nu9C/Fh9KJzpNe6xgvOx q3u0UDjvOw5j2C7YKailx2Uop+U2Gs8m9etQhNgzEtWqBtUXOJSHVTGbEWWnE2yTxqfzAQugccBQ hcxWKJjTEcGsGjWA/DNIeZjZv1oz6oWKgngYgisM8DZztKGImYzpwtV2u5AjtsEMLjlWziZbnwTW vYw2A4n70WuzEeIYESIPDdUJWOBuPxO0jJAHsPdj1H6RNuBO64khreCqNrL+4WOj9GLtzgPgCHD3 NiRvvhYdMv5KIDZDCdOOuHrTVxzlPuSm9ELht2wEzz/Xni1guZA8Hje3K7FZZfwXCc5pVMf0EN8Z sPvAzHOg1+7CN4HVByRYUQQWX40OB8GxeGlmkZdGsQOduaLlgTl6fJxyntEfhZCKje4ZXSuzWppM 264dyvKvp8PBUFYFvf25LVONYbYifH5OzZB5qZW8mIePsNN3rN9js430qOSYcJPoTEymKabgNgWl nmV+DGySCdeMmfSTyDK5Fs9Gag7Mi4PsnyZsmf04wl/sLogVLlfPRxpS4orxvoxL22yO/MnptZti 7XfpwkCaM4LcV+2hTT8tnsaCZGjzGy37c+j4rcif1iJeEmPePKfLi2H2bJ43VGXzT7jmeis6IlLW P2kQlLrvRVjS3MLA4yC77kKqwwTptJsxixDVf9L+2uiZeuM3H1loyMZp0FLwgdU8JSfbC+JK62Vo Uz7lKtDqTIyXXXELsc7bebe5rlTbu0MrSjuSfkWK0XxA5XoKIM9RXxKF5tPxTxfD0dMN+t5ZqOgU AUm9XPIw8i9HxRkBKXdmsV1D3duJ5UpavZ6ru5e41QGZGWyh8jLdMZuEdsIhIb45hASQPHQTDdos ZhTULuv5+xNLX7J80SrUE4vW6MWZ0dEqwY4lelob0ErttooptwERZXSSDZL7eS4eAbBXy4rHwf0p 4lno1ydyeXoB110Y1DHgonRCF4rHnRVdn3Yl X-Report-Abuse-To: spam@quarantine3.antispamcloud.com X-Spam-Score: 0.3 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Mmmm. Kite antennas are for summer ;-) Have a look at this technique. Mixing Kite aerodynamics with hellium lift-off push you get a real stable system to keep a wire up for long time and dealing with wind. Probably not cheap, I'm afraid. They have a distributor in DL http://www.allsopp.co.uk/index.php?mod=page&id_pag=58 [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [185.201.18.22 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 T_KAM_HTML_FONT_INVALID BODY: Test for Invalidly Named or Formatted Colors in HTML 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: b0f06858df415ca55c034ffb16f50aac X-SA-Exim-Scanned: No; SA Timed out after 180 secs 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 --_000_6DB8451D7F3D3947A5918808A59621EA08524F3Aservigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mmmm. Kite antennas are for summer ;-) Have a look at this technique. Mixing Kite aerodynamics with hellium lift-o= ff push you get a real stable system to keep a wire up for long time and dealing with wind. Probably not cheap, I'm afraid. They have a distributor = in DL http://www.allsopp.co.uk/index.php?mod=3Dpage&id_pag=3D58 73 de Luis EA5DOM De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blackshe= ep.org] En nombre de DK7FC Enviado el: martes, 03 de julio de 2018 23:42 Para: rsgb_lf_group@blacksheep.org Asunto: Re: LF: RE: Summer games / EARTH ANTENNAS Hi Marcin, Keep us informed about your experiments. For you it may be more useful to t= ry kite antennas! Give it a try, it is very easy a nd exciting! For power generation i used such a cheap generator: https://www.amazon.de/d= p/B000QD1EHY/ For 500W it was running quite well, until i made the mistake to mix the oil= and fuel BEFORE filling it into the tank. It is cheap and not very high quality but it is possible to carry it on you= r own, which was essential for my kite experiments. If you want quality, then by a Honda generator... 73, Stefan Am 03.07.2018 21:26, schrieb Marcin: Hello Stefan! >From my experience, erth dipole work best on 630m. Unfortunately, in the no= rth of Poland, the soil is well or very conductive. In rocky ground you can= get much better results. I am waiting for autumn to continue my experiment= s. https://klubnl.pl/wpr/en/index.php/2018/01/09/most-na-wisle-elementem-anten= y-czyli-eksperymentow-z-dipolami-ziemnymi-ciag-dalszy/ https://klubnl.pl/wpr/en/index.php/2017/11/26/kolejne-proby-z-antena-dipol-= ziemny/ I am looking for a power generator for power supply in the field. Can anyon= e recommend something? 73! Marcin SQ2BXI From: owner-rsgb_lf_group@blacksheep.org On Behalf Of DK7FC Sent: Tuesday, July 3, 2018 7:50 PM To: rsgb_lf_group@blacksheep.org Subject: LF: Summer games / EARTH ANTENNAS Hi Joe, VLF, You seem to like to 'play' on the very low frequencies during the sunny day= s :-) Same here! My YL bought a house in JN39XI and we are spending almost each w= eekend there in the peaceful silence. The forest is really great! I guess y= ou know that, as a Canadian. Now i'm planning to receive some signals in JN39XI07 . BTW a most useful distance for analysing my own signals= from Heidelberg (about 55 km QRB). Oh and i think about playing with earth antennas again, you know! BTW did someone (of the group) ever tried to build a full size dipole for 1= 37 kHz? I mean for transmitting! On a stony mountain/hill it could be bette= r than expected. With a Raspi + GPS module one could build up a simple WSPR= beacon and a ICL7667, which can be driven by the 3.3 V GPIO output voltage= could make a simple and effective 5W PA running at 12V. The wire just needs to be 1000m long or so. In a low frequented forest it c= ould lay there for some days... I remeber experimenting with a full size dipole on 630m in 2012, when the b= and was quite young. It worked well although the antenna was just 4m above = the ground and the soil conductivity was not ideal (medium conductivity). A= few CW QSOs were done out of a 7 Ah gel battery and just 50W or so, in Jul= y! And what about VLF and ULF using earth antennas? I remember making 45 km di= stance on 8.97 kHz from the 700m long wire antenna, grounded at each end (2= 50W RF power if i remember correctly). That was about 15 dB in 3.8 mHz. But= what would be possible on lower frequencies if the far end of the wire is = well grounded? Time to fill that summer hole (activity)! 73, Stefan Am 03.07.2018 14:03, schrieb jcraig@mun.ca: This was the first time SAQ was heard here using a mobile RX. It was in a = quiet location, a km from mains lines and other RF pollution. SAQ became = quite weak when the RX was in the forest however. The trees must be good conductors at VLF= . Is the low-power miniwhip mentioned below the same new one designed with help from G4COL with a J310, Rs=3D 47-270 ohm and the FT-37-43 xfmr? I'd l= ike to try that at VLF. --_000_6DB8451D7F3D3947A5918808A59621EA08524F3Aservigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Mmmm. Kite antennas are for summer ;-)

 

Have a look at this technique. Mixing Kite aerodynamics= with hellium lift-off push you get a real stable system to keep a wire up = for long time and

dealing with wind. Probably not cheap, I’m afraid= . They have a distributor in DL

http://www.allsopp.co.uk/index.php?mod=3Dpage&id_pag= =3D58

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:= owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: martes, 03 de julio de 2018 23:42
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: RE: Summer games / EARTH ANTENNAS<= /p>

 

Hi Marcin,

Keep us informed about your experiments. For you it may be more useful to t= ry kite antennas! Give it a try, it is very easy a nd exciting!

For power generation i used such a cheap generator: https://www.amazon.de/dp/B000QD1EHY/
For 500W it was running quite well, until i made the mistake to mix the oil= and fuel BEFORE filling it into the tank.
It is cheap and not very high quality but it is possible to carry it on you= r own, which was essential for my kite experiments.
If you want quality, then by a Honda generator...

73, Stefan

Am 03.07.2018 21:26, schrieb Marcin: =

Hello Stefan!

From my experience, erth dipole wo= rk best on 630m. Unfortunately, in the north of Poland, the soil is well or= very conductive. In rocky ground you can get much better results. I am waiting for autumn to continue my experiment= s.

https:= //klubnl.pl/wpr/en/index.php/2018/01/09/most-na-wisle-elementem-anteny-czyl= i-eksperymentow-z-dipolami-ziemnymi-ciag-dalszy/

https://klubnl.pl/wpr/en/index.php/2017/11/26/kolejne-proby= -z-antena-dipol-ziemny/

I am looking for a power generator= for power supply in the field. Can anyone recommend something?

&nbs= p;

73! = Marcin SQ2BXI

&nbs= p;

From:= owner-rsgb_lf_group@b= lacksheep.org <owner-rsgb_lf_gro= up@blacksheep.org> On Behalf Of DK7FC
Sent: Tuesday, July 3, 2018 7:50 PM
To: rsgb_lf_group@bl= acksheep.org
Subject: LF: Summer games / EARTH ANTENNAS

 

Hi Joe, VLF,

You seem to like to 'play' on the very low frequencies during the sunny day= s :-)

Same here! My YL bought a house in JN39XI and we are spending almost each w= eekend there in the peaceful silence. The forest is really great! I guess y= ou know that, as a Canadian.
Now i'm planning to receive some signals in JN39XI07 .  BTW a most useful distance for analysing my own signal= s from Heidelberg (about 55 km QRB).
Oh and i think about playing with earth antennas again, you know!

BTW did someone (of the group) ever tried to build a full size dipole for 1= 37 kHz? I mean for transmitting! On a stony mountain/hill it could be bette= r than expected. With a Raspi + GPS module one could build up a simple = WSPR beacon and a ICL7667, which can be driven by the 3.3 V GPIO output voltage could make a simple and effecti= ve 5W PA running at 12V.
The wire just needs to be 1000m long or so. In a low frequented forest it c= ould lay there for some days...

I remeber experimenting with a full size dipole on 630m in 2012, when the b= and was quite young. It worked well although the antenna was just 4m above = the ground and the soil conductivity was not ideal (medium conductivity). A= few CW QSOs were done out of a 7 Ah gel battery and just 50W or so, in July!

And what about VLF and ULF using earth antennas? I remember making 45 km di= stance on 8.97 kHz from the 700m long wire antenna, grounded at each end (2= 50W RF power if i remember correctly). That was about 15 dB in 3.8 mHz. But= what would be possible on lower frequencies if the far end of the wire is well grounded?

Time to fill that summer hole (activity)!

73, Stefan


Am 03.07.2018 14:03, schrieb jcraig@mun.c= a:

This was the first time SAQ was heard here using a m= obile RX.  It was in a quiet location, a km  from mains lines and= other RF pollution.  SAQ became quite weak when
the RX was in the forest however.  The trees must be good conductors a= t VLF.

Is the low-power miniwhip mentioned below the same new one designed with help from G4COL with a J310, Rs=3D 47-270 ohm and the FT-37-43 xfmr?  = I'd like
to try that at VLF.

--_000_6DB8451D7F3D3947A5918808A59621EA08524F3Aservigilantvigi_--