Return-Path: X-Spam-DCC: paranoid 1480; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u789MUx5030481 for ; Mon, 8 Aug 2016 11:22:30 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bWgcq-0005OV-9w for rs_out_1@blacksheep.org; Mon, 08 Aug 2016 10:13:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bWgcp-0005OM-KK for rsgb_lf_group@blacksheep.org; Mon, 08 Aug 2016 10:13:35 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1bWgcn-0008Qh-HS for rsgb_lf_group@blacksheep.org; Mon, 08 Aug 2016 10:13:34 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 80BB5209BD for ; Mon, 8 Aug 2016 11:13:31 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3s7BXp6xkGz104j for ; Mon, 8 Aug 2016 11:13:30 +0200 (CEST) Message-ID: <57A84D3A.4010207@posteo.de> Date: Mon, 08 Aug 2016 11:13:30 +0200 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: <42d0a8048611470a8a0ee76f96c10ff7@kabelmail.de> In-Reply-To: <42d0a8048611470a8a0ee76f96c10ff7@kabelmail.de> X-Scan-Signature: f82786fce13a7bdfc3036eb41b44b924 Subject: Re: LF: Test signal on 5.33 kHz Content-Type: multipart/alternative; boundary="------------040605060803020104040406" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8524 This is a multi-part message in MIME format. --------------040605060803020104040406 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hello Uwe, Yes since yesterday 14 UTC i am back on 2970 Hz. And the signal is about 5 dB stronger now, as you can see on my remote grabber. The antenna current is not stable (but the phase is!), the parallel C seems to have a high temperature coefficient. You can see a slow peak in the antenna current during sunrise and sunset. This is when the resonance is pasing 2970 Hz :-) In the coming days i like to install my transductor to control the resonance frequency to compensate the drift. However the phase meter does not work properly on 2970 Hz. I will investigate... A new portable 30 km experiment is in preparation.... Ah BTW i consider to leave 2970 Hz and move to 2970.0025000 Hz. It may be a better frequency to detect my signal from a simple carrier. Or maybe i just do QSY during this experiment because Renato Romero is running a 1.26 uHz spectrogram on 2970.0000 Hz which takes about 2 weeks if restarted :-) 73, Stefan Am 07.08.2016 22:38, schrieb uwe-jannsen@kabelmail.de: > > impressive work, Stefan. > > Are you back on 2970Hz now? > > yesterday at 0830UTC lightning destroyed the soundcard and the LT1028 > of the active abtenna. > but QRV agn, ahm SL acquisition status at times: 34%. > > 73 > > Uwe/dj8wx > > > *Von:* DK7FC > *Gesendet:* 07.08.2016 14:32 > *An:* > *Betreff:* Re: LF: Test signal on 5.33 kHz > The experiment was stopped at 12:25 UTC. > The loading coil holds the high voltage. Now i will order another 2 kg > of 0.4mm wire to add more turns... > > 73, Stefan > > Am 07.08.2016 12:20, schrieb DK7FC: > > Hi VLF, > > > > Since 10:08 UTC i'm running a test transmission on 5330 Hz. About 240 > > mA antenna current leads to 12 kV across the D.U.T., my new loading > > coil which is intended for 2970 Hz. So far the inductance seems to be > > 1.9 H. > > I want to check if it actually holds the high voltage as to my > > estimation before i continue to add more turns. The estimation is that > > each winding stack has to hold 5 kV. I will then end up somewhere > > between 30 and 40 kV at 2970 Hz... > > An image: > > https://dl.dropboxusercontent.com/u/19882028/VLF/20160807_114115.jpg > > > > If someone wants to check if the signal is detectable in some > > distance.... > > > > The signal will be on the air for at least one hour. > > > > 73, Stefan > > --------------040605060803020104040406 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello Uwe,

Yes since yesterday 14 UTC i am back on 2970 Hz. And the signal is about 5 dB stronger now, as you can see on my remote grabber.
The antenna current is not stable (but the phase is!), the parallel C seems to have a high temperature coefficient. You can see a slow peak in the antenna current during sunrise and sunset. This is when the resonance is pasing 2970 Hz :-)
In the coming days i like to install my transductor to control the resonance frequency to compensate the drift. However the phase meter does not work properly on 2970 Hz. I will investigate...

A new portable 30 km experiment is in preparation....

Ah BTW i consider to leave 2970 Hz and move to 2970.0025000 Hz. It may be a better frequency to detect my signal from a simple carrier. Or maybe i just do QSY during this experiment because Renato Romero is running a 1.26 uHz spectrogram on 2970.0000 Hz which takes about 2 weeks if restarted :-)

73, Stefan


Am 07.08.2016 22:38, schrieb uwe-jannsen@kabelmail.de:

impressive work, Stefan.

Are you back on 2970Hz now?

yesterday at 0830UTC lightning destroyed  the soundcard and the LT1028 of the active abtenna.
but QRV agn, ahm SL acquisition status at times: 34%.

 

73

Uwe/dj8wx


 
Von: DK7FC <selberdenken@posteo.de>
Gesendet: 07.08.2016 14:32
An: <rsgb_lf_group@blacksheep.org>
Betreff: Re: LF: Test signal on 5.33 kHz
 
The experiment was stopped at 12:25 UTC.
The loading coil holds the high voltage. Now i will order another 2 kg
of 0.4mm wire to add more turns...

73, Stefan

Am 07.08.2016 12:20, schrieb DK7FC:
> Hi VLF,
>
> Since 10:08 UTC i'm running a test transmission on 5330 Hz. About 240
> mA antenna current leads to 12 kV across the D.U.T., my new loading
> coil which is intended for 2970 Hz. So far the inductance seems to be
> 1.9 H.
> I want to check if it actually holds the high voltage as to my
> estimation before i continue to add more turns. The estimation is that
> each winding stack has to hold 5 kV. I will then end up somewhere
> between 30 and 40 kV at 2970 Hz...
> An image:
> https://dl.dropboxusercontent.com/u/19882028/VLF/20160807_114115.jpg
>
> If someone wants to check if the signal is detectable in some
> distance....
>
> The signal will be on the air for at least one hour.
>
> 73, Stefan
>
 
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