Return-Path: Received: from mtain-dg07.r1000.mx.aol.com (mtain-dg07.r1000.mx.aol.com [172.29.65.15]) by air-md09.mail.aol.com (v129.4) with ESMTP id MAILINMD093-8b964d287df12fd; Sat, 08 Jan 2011 10:08:33 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dg07.r1000.mx.aol.com (Internet Inbound) with ESMTP id E0BD7380000A5; Sat, 8 Jan 2011 10:08:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PbaOX-0003tP-1m for rs_out_1@blacksheep.org; Sat, 08 Jan 2011 15:07:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PbaOW-0003tE-E1 for rsgb_lf_group@blacksheep.org; Sat, 08 Jan 2011 15:07:52 +0000 Received: from cavuit02.kulnet.kuleuven.be ([134.58.240.44]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PbaOU-0005mA-IY for rsgb_lf_group@blacksheep.org; Sat, 08 Jan 2011 15:07:52 +0000 Received: from smtps02.kuleuven.be (smtpshost02.kulnet.kuleuven.be [134.58.240.75]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id CCC2F759FCA for ; Sat, 8 Jan 2011 16:07:42 +0100 (CET) Received: from ICTS-S-HUB-N4.luna.kuleuven.be (icts-s-hub-n4.luna.kuleuven.be [10.112.9.14]) by smtps02.kuleuven.be (Postfix) with ESMTP id 9A4A6F3862 for ; Sat, 8 Jan 2011 16:07:42 +0100 (CET) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N4.luna.kuleuven.be ([10.112.9.14]) with mapi; Sat, 8 Jan 2011 16:07:42 +0100 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Sat, 8 Jan 2011 16:06:45 +0100 Thread-Topic: LF: DK7FC 137 kHz kite activity, 8. Jan. Thread-Index: AcuvHxWiJyQLBGUPSbyhiFpc6B5jmQAJpTRG Message-ID: References: <4D25EC9A.6030201@iup.uni-heidelberg.de> <55F29B964A0142EE93CCD0BCFD084EDF@JimPC> <4D27796E.8020107@iup.uni-heidelberg.de>,<4D283C59.6080303@iup.uni-heidelberg.de> In-Reply-To: <4D283C59.6080303@iup.uni-heidelberg.de> Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: RE: LF: DK7FC 137 kHz kite activity, 8. Jan. Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C88715AEA11ICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=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 x-aol-global-disposition: G x-aol-sid: 3039ac1d410f4d287def2e81 X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C88715AEA11ICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Any news from Stefan ? Very strong winds here, so I hope he is not /AM ;-) 73, Rik ON7YD - OR7T ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.or= g] namens Stefan Sch=E4fer [schaefer@iup.uni-heidelberg.de] Verzonden: zaterdag 8 januari 2011 11:28 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: DK7FC 137 kHz kite activity, 8. Jan. LF, I'll begin now starting the experiment. QRV in 3...4 hours... 73, Stefan/DK7FC Am 07.01.2011 21:37, schrieb Stefan Sch=E4fer: Daer LF group, Due to the WX forecast i decided to start my activity tomorrow. It will be= just on LF, no VLF activity this time. Perhaps the wind is too strong so= i can only use the 100m kite with its 500 kp strong braid. The 300m kite= has a 280 kp braid which might be to weak but maybe i'm crazy enough to= use it anyway. The 300m kite is allowed to be used only in daylight. So,= in the night i have to go down to 100m anyway. Apart from doing QSOs (hopefully) my goals are reaching the 4X1RF grabber= in DFCW-3 and the JA7NI grabber in DFCW-60 or 90. Furthermore i remember= an almost-QSO with Ed / RU6LA. Would be nice if this could be completed.= I'll start in the afternoon, maybe 11 UTC, without to much stress. But i= plan to stay long, so hopefully a contact to USA and maybe even Argentini= a could be possible? Maybe even a trace at VE7TIL? LF-Dreaming!!! BTW i am interested in local QSOs as well, not only DX is of interest!! Since my LF converter isn't finished i have to use the DDS VFO for LF whic= h is slightly drifting in a QRSS-60 window but i'll be in contact with DF6= NM who can tell me the drift and offset ;-) If all works well, my CW QRG will be 136.8 kHz, DFCW-3 137.7 kHz and DFCW-= 60/90 136.177 kHz(+- 3 Hz). My receivers are the 706, the K2 (with a GW4AL= G 30m-converter) and the new /p RX that is under test... During transmitti= ng DFCW-3 i will receive in DFCW-3 and 10. My /p RX is still not optimised but at least i got a QSO with RA3YO in DFC= W3/8 last year and a CW contact to M0BMU and G3KEV. I'll have my CW key th= ere and hope for some nice contacts! Any reports are much appreciated! :-) Best 73, Stefan/DK7FC Am 06.01.2011 22:33, schrieb James Moritz: Dear Stefan, LF Group, _Questions:_ Is my calculation reasonably useful? Would YOU add that coil in a height of 100m above GND? I have found with NEC simulations that they give you a reasonable idea of= the impedance, but not a precise value. Especially for the resistance, wh= ere there are many unknowns - NEC really only sets a lower limit. On the basis of the calculations, I would first try without the coil, then= if results are as expected, I would try it with the coil. Otherwise there= are too many variables to make sense of the experiment - if the coil goes= up and the impedance is totally different from the calculation, is it bec= ause of the coil, the antenna, or the calculation? I tend to let it be since the improvement isn't that much and the effort is high. Furthermore the coil losses could be higher since i have to use a thin wire to keep the weight small... Yes - the 136k coils I have made with Q > 300 have been rather big, either= with RF Litz wire or thick solid wire. Hope to see some signals at the weekend, Cheers, Jim Moritz 73 de M0BMU --_000_BF4A524700075746A6467658DFC7102C88715AEA11ICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Any news from Stefan ?
Very strong winds here, so I hope he= is not /AM ;-)
 
73, Rik  ON7YD - OR7T
 
Van: owner-rsgb_= lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Stefan= Sch=E4fer [schaefer@iup.uni-heidelberg.de]
Verzonden: zaterdag 8 januari 2011 11:28
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: DK7FC 137 kHz kite activity, 8. Jan.

LF,

I'll begin now starting the experiment. QRV in 3...4 hours...

73, Stefan/DK7FC

Am 07.01.2011 21:37, schrieb Stefan Sch=E4fer:
Daer LF group,

Due to the WX forecast i decided to start my activity tomorrow. It will be= just on LF, no VLF activity this time. Perhaps the wind is too strong so= i can only use the 100m kite with its 500 kp strong braid. The 300m kite= has a 280 kp braid which might be to weak but maybe i'm  crazy enough to use it anyway. The 300m kite<= /b> is allowed to be used only in daylight. So, in the night i have to go= down to 100m anyway.

Apart from doing QSOs (hopefully) my goals are reaching the 4X1R= F grabber in DFCW-3 and the JA7NI grabber in DFCW-60 or 90. Furthermore i remember an almost-QS= O with Ed / RU6LA. Would be nice if this could be completed. I'll start in th= e afternoon, maybe 11 UTC, without to much stress. But i plan to stay long= , so hopefully a contact to USA and maybe even Argentinia could be possibl= e? Maybe even a trace at VE7TIL? LF-Dreaming!!!
BTW i am interested in local QSOs as well, not only DX is of interest!!
Since my LF converter isn't finished i have to use the DDS VFO for LF whic= h is slightly drifting in a QRSS-60 window but i'll be in contact with DF6= NM who can tell me the drift and offset ;-)

If all works well, my CW QRG will be 136.8 kHz, DFCW-3 137.7 kHz and DFCW-= 60/90 136.177 kHz(+- 3 Hz). My receivers are the 706, the K2 (with a= GW4ALG 30m-converter) and the new /p RX that is under test... During tran= smitting DFCW-3 i will receive in DFCW-3 and 10.

My /p RX is still not optimised but at least i got a QSO with RA3YO in DFC= W3/8 last year and a CW contact to M0BMU and G3KEV. I'll have my CW key th= ere and hope for some nice contacts!

Any reports are much appreciated! :-)

Best 73, Stefan/DK7FC

Am 06.01.2011 22:33, schrieb James Moritz:
Dear Stefan, LF Group,

_Questions:_ Is my calculation reasonably useful= ? Would YOU add that
coil in a height of 100m above GND?

I have found with NEC simulations that they give you a reasonable idea of= the impedance, but not a precise value. Especially for the resistance, wh= ere there are many unknowns - NEC really only sets a lower limit.

On the basis of the calculations, I would first try without the coil, then= if results are as expected, I would try it with the coil. Otherwise there= are too many variables to make sense of the experiment - if the coil goes= up and the impedance is totally different from the calculation, is it because of the coil, the antenna, or the calc= ulation?


I tend to let it be since the improvement isn't that much and the effort=
is high. Furthermore the coil losses could be higher since i have to use=
a thin wire to keep the weight small...

Yes - the 136k coils I have made with Q > 300 have been rather big, eit= her with RF Litz wire or thick solid wire.

Hope to see some signals at the weekend,

Cheers, Jim Moritz
73 de M0BMU


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