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 vAUKm6GJ003894 for ; Thu, 30 Nov 2017 21:48:09 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eKVfr-0004Dw-JK for rs_out_1@blacksheep.org; Thu, 30 Nov 2017 20:43:11 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eKVfW-0004Dn-3M for rsgb_lf_group@blacksheep.org; Thu, 30 Nov 2017 20:42:50 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eKVfQ-0001Mj-KW for rsgb_lf_group@blacksheep.org; Thu, 30 Nov 2017 20:42:47 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 9C39B20E7D for ; Thu, 30 Nov 2017 21:42:42 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1512074562; bh=2OLr0i1uwOTtbjEXR6IjXBF9Rb3gFhIVvE3lv6zyrjo=; h=Date:From:To:Subject:From; b=n84HVCtRXkpo2G0ULzN5bIcwcLh3fE/R6rJbNarblIyXUgZyHMkRmhWmklY45Cj/3 z+2IHjBDcHRCDBkKD4boUfLpWiDeqY+p+CF5EHCZ5fsrUObhCJNTEm+i+C4PXKCXwn 2Zattw9oMBIyvIK6if+sBUkTvOOl04gDYLggxpcS1DZpoUKVLvH+6MpXy+Dbh5fbU0 ctRqIjxABi8zZQUutqHJ9nmSDQY4H879MRnXIBfARCZhbNhy0qtSm9iHc65HkvtdW3 aGUlnNPkDFfIkJ18XEvIDjVqXyTc9fgadaGlNbWs/rK45xB8xZYMEmIdITSU57yxht CAfPgUPIXUpeA== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3ynq8x6rm0z9rxZ for ; Thu, 30 Nov 2017 21:42:40 +0100 (CET) Message-ID: <5A206D40.9070600@posteo.de> Date: Thu, 30 Nov 2017 21:42:40 +0100 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: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A19FF75.7080801@posteo.de> <5A1FFEAE.3040603@posteo.de> In-Reply-To: X-Spam-Score: 0.0 (/) 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 the administrator of that system for details. Content preview: Hello VLF, The TX was switched OFF at 19 UTC, so the carrier was on air for 116 hours :-) Since 20:30 UTC it is now back at 1 A antenna current, 3 dB more. The QRG is still 17.470100000 kHz [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: d7b6e02b91d1bc9fedf732bdb432c3bc Subject: Re: VLF: DK7FC close to SAQ Content-Type: multipart/alternative; boundary="------------070906010909050500000807" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=HTML_30_40,HTML_MESSAGE, LINK_TO_NO_SCHEME 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 This is a multi-part message in MIME format. --------------070906010909050500000807 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello VLF, The TX was switched OFF at 19 UTC, so the carrier was on air for 116 hours :-) Since 20:30 UTC it is now back at 1 A antenna current, 3 dB more. The QRG is still 17.470100000 kHz 73, Stefan Am 30.11.2017 20:49, schrieb Max IK0VVE: > GE dears, > > I'm also following your TX, Stefan, with a 424 uHz grabber with no > result at the moment. I'll try also the 42 uHz one. > As antenna I'm using the MF TX marconi because whip and loop are ready > for the qsy in the "silent-qth". Noise with this antenna is very high > but I'm in RX anyway. > Thanks for transmission. > > 73, Max IK0VVE > > > ______________________________ > > /...here some of my HAM Radio projects.../ > > / > / > /www.ik0vve.net/ > > > Da: owner-rsgb_lf_group@blacksheep.org > A: rsgb_lf_group@blacksheep.org > Cc: > Data: Thu, 30 Nov 2017 13:50:54 +0100 > Oggetto: Re: VLF: DK7FC close to SAQ > > Hello VLF freinds, > I spent some day in Berlin, thus the late reply, sorry. > The carrier is actually running since 25.Nov 23 UTC witout any > interruption! I have/had control over the TX via the samrtphone. I can > follow the antenna current and can access the PC to stop the > transmission if something would be wrong. Also there is the safety > function that stops the transmission as soon as the antenna current > drops by more than 30 mA under the target level of 700 mA. > Thanks to all stations who gave a feedback and RX report of the first > amateur transmission on 17.47 kHz. > Special congrats to IW4DXW who made his first amateur VLF reception at > all (i think)! > Riccardo, is that spectrogram really set to 3.8 mHz FFT bin width, as > stated in the text field? > Your simple antenna matching schmatic is apprechiated. It may be helpful > for further stations. I note that no special preamp is needed. > Luis, your few bright pixels look most promising. But maybe it is better > to wait until tomorrow before claiming that new distance record on the > 17 km band. It would be a first amateur detection on VLF between DL and > EA! This evening i will finally rise the ERP by 3 dB, going from 700 mA > to 1 A antenna current... With 3 dB more, the few pixels should become a > solid line. > BTW all this helps to see how 'far' you are away from getting a > detection on 8270 and below.. > Sq5BPF has set up a grabber but didn't see a trace so far. I started a > grabber window at RC4HAA running at 212 uHz. There is no trace at all! I > did expect much better results over that distance. > Also KL7L has set up a grabber window, without results so far. > My first impression is that the band offers less better propagation than > expected! So let's hope that QRO will help :-) > Before loosing these informations i set up a small list containing > informations about RX stations and SNR reports, see attachment. Tell me > if there is something wrong or if i forgot something. > I will inform when the signal level has changed or when interruptions > happened. So far the transmission is still running. Ah yes the antenna > current ca be followed at > http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/TX.png Quite > unspectacular but some kind of feedback... > 73, Stefan > Am 29.11.2017 22:46, schrieb Riccardo Zoli: > > Hi Stefan, VLF > > > > I got your signal in JN64bw, dear Stefan. Depending on the QSB and/or > > QRN, you're peaking 15dB over noise. Fantastic! :-)) > > I'm using my LF antenna tuned on your QRG with a (approx.) 200mH coil. > > The 17470.5 signal (locally generated by a GPS disciplined DDS) is > > used for Spectrum Lab SR correction. > > Schematic and capture attached. > > > > > > Congrats, Stefan, and keep up the good work! > > > > All the best, > > > > 73 de Riccardo IW4DXW > > > > > > > > 2017-11-26 0:40 GMT+01:00 DK7FC: > > > >> Hi VLF, > >> > >> Since 23 UTC a 700 mA carrier is running on 17.4701 kHz! > >> > >> It is a little surprise to the VLF community i think ;-) > >> > >> Legal? Yes: > >> > http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/17,47kHz_Sonderlizenz.jpg > >> Actually the document has 3 pages but the other ones are no so > relevant. > >> My ERP is limited to 5 mW. I did not request more because more isn't > >> possible anyway with this antenna. > >> > >> I wound a big single layer coil with 0.5 mm enameled wire on a PVC > tube with > >> 315 mm outher diameter. > >> > >> 0.7 A is just a first careful step. The coil is designed to hold > 1.5 A 'key > >> down'. > >> > >> The carrier will run the whole night and even tomorrow at daytime. > >> > >> Worldwide reports are welcome ;-) > >> > >> It is not sub-9-kHz but still VLF, the 17 km band!! So give it > chance :-) > >> > >> The tree has still some solar power to stream the signal from the > EW loop > >> down to the city, so there is a feedback spectrogram at > >> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html > >> > >> > >> 73, Stefan > >> > >> PS: I still can hear that tone of the coil. It is terrible! Be > happy when > >> you are older than me! > >> --------------070906010909050500000807 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello VLF,

The TX was switched OFF at 19 UTC, so the carrier was on air for 116 hours :-)

Since 20:30 UTC it is now back at 1 A antenna current, 3 dB more. The QRG is still 17.470100000 kHz

73, Stefan





Am 30.11.2017 20:49, schrieb Max IK0VVE:
GE dears,

I'm also following your TX, Stefan, with a 424 uHz grabber with no result at the moment. I'll try also the 42 uHz one. 
As antenna I'm using the MF TX marconi because whip and loop are ready for the qsy in the "silent-qth". Noise with this antenna is very high but I'm in RX anyway.
Thanks for transmission.

73, Max IK0VVE 


______________________________

 
...here some of my HAM Radio projects...




Cc:
Data: Thu, 30 Nov 2017 13:50:54 +0100
Oggetto: Re: VLF: DK7FC close to SAQ

Hello VLF freinds,
 
I spent some day in Berlin, thus the late reply, sorry.
The carrier is actually running since 25.Nov 23 UTC witout any
interruption! I have/had control over the TX via the samrtphone. I can
follow the antenna current and can access the PC to stop the
transmission if something would be wrong. Also there is the safety
function that stops the transmission as soon as the antenna current
drops by more than 30 mA under the target level of 700 mA.
 
Thanks to all stations who gave a feedback and RX report of the first
amateur transmission on 17.47 kHz.
Special congrats to IW4DXW who made his first amateur VLF reception at
all (i think)!
 
Riccardo, is that spectrogram really set to 3.8 mHz FFT bin width, as
stated in the text field?
Your simple antenna matching schmatic is apprechiated. It may be helpful
for further stations. I note that no special preamp is needed.
 
Luis, your few bright pixels look most promising. But maybe it is better
to wait until tomorrow before claiming that new distance record on the
17 km band. It would be a first amateur detection on VLF between DL and
EA! This evening i will finally rise the ERP by 3 dB, going from 700 mA
to 1 A antenna current... With 3 dB more, the few pixels should become a
solid line.
BTW all this helps to see how 'far' you are away from getting a
detection on 8270 and below..
 
Sq5BPF has set up a grabber but didn't see a trace so far. I started a
grabber window at RC4HAA running at 212 uHz. There is no trace at all! I
did expect much better results over that distance.
Also KL7L has set up a grabber window, without results so far.
My first impression is that the band offers less better propagation than
expected! So let's hope that QRO will help :-)
 
Before loosing these informations i set up a small list containing
informations about RX stations and SNR reports, see attachment. Tell me
if there is something wrong or if i forgot something.
 
I will inform when the signal level has changed or when interruptions
happened. So far the transmission is still running. Ah yes the antenna
current ca be followed at
unspectacular but some kind of feedback...
 
73, Stefan
 
 
Am 29.11.2017 22:46, schrieb Riccardo Zoli:
> Hi Stefan, VLF
> 
> I got your signal in JN64bw, dear Stefan. Depending on the QSB and/or
> QRN, you're peaking 15dB over noise. Fantastic! :-))
> I'm using my LF antenna tuned on your QRG with a (approx.) 200mH coil.
> The 17470.5 signal (locally generated by a GPS disciplined DDS) is
> used for Spectrum Lab SR correction.
> Schematic and capture attached.
> 
> 
> Congrats, Stefan, and keep up the good work!
> 
> All the best,
> 
> 73 de Riccardo IW4DXW
> 
> 
> 
> 2017-11-26 0:40 GMT+01:00 DK7FC<selberdenken@posteo.de>:
>
>> Hi VLF,
>> 
>> Since 23 UTC a 700 mA carrier is running on 17.4701 kHz!
>> 
>> It is a little surprise to the VLF community i think ;-)
>> 
>> Legal? Yes:
>> Actually the document has 3 pages but the other ones are no so relevant.
>> My ERP is limited to 5 mW. I did not request more because more isn't
>> possible anyway with this antenna.
>> 
>> I wound a big single layer coil with 0.5 mm enameled wire on a PVC tube with
>> 315 mm outher diameter.
>> 
>> 0.7 A is just a first careful step. The coil is designed to hold 1.5 A 'key
>> down'.
>> 
>> The carrier will run the whole night and even tomorrow at daytime.
>> 
>> Worldwide reports are welcome ;-)
>> 
>> It is not sub-9-kHz but still VLF, the 17 km band!! So give it chance :-)
>> 
>> The tree has still some solar power to stream the signal from the EW loop
>> down to the city, so there is a feedback spectrogram at
>> 
>> 
>> 73, Stefan
>> 
>> PS: I still can hear that tone of the coil. It is terrible! Be happy when
>> you are older than me!
>>
--------------070906010909050500000807--