From: DK7FC <73dk7fc@googlemail.com>
Message-ID: <58E01A7C.9090403@gmail.com>
Date: Sat, 01 Apr 2017 23:24:12 +0200
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: <93ae1c86-9b2e-8313-069f-8b0d941b49c8@abelian.org> <58D96EAC.70402@gmail.com> <e5b10088-4401-230e-36ae-4ab64d6a6956@abelian.org> <e8f7f514-5e2e-87f1-08b2-f87876648b67@abelian.org> <7CC18617-5440-4117-A544-7EC9828ABACA@gmail.com> <CABe3FyDmqTiYQ+qWn_6m_GMSy9sc-0faFhi6kuXAPkjToxFN6g@mail.gmail.com> <4dffbfb1-8ad8-c275-a31b-0157c3960801@btinternet.com> <Pine.LNX.4.64.1703281940100.32007@plato.ucs.mun.ca> <58DD3DDF.9060109@gmail.com> <Pine.LNX.4.64.1703311557240.13510@plato.ucs.mun.ca> <58DEC46D.4040703@gmail.com> <Pine.LNX.4.64.1704011757470.16875@plato.ucs.mun.ca>
In-Reply-To: <Pine.LNX.4.64.1704011757470.16875@plato.ucs.mun.ca>
Subject: Re: Joe on VLF:
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Status: RO

Hi Joe,

I thought about the hill you have been recently. Was it 'signal hill', 
where the signals from Marconi were received? That would be a nice place 
for a grabber!
But of course there must be internet first, and not to much QRM on the 
other side.
You are in a radio club i assume. Are there any youngsters who have time 
and motivation to join the experiments? I often think that we all are 
far below our potential. There could be some orders of magnitude more 
active people. But the activation energy seems to be to high and most of 
them are not 'self-running systems'...

73, Stefan

Am 01.04.2017 22:57, schrieb jcraig@mun.ca:
>
> Hi Stefan,
>
> Thank-you for the revisions to the config file. It was opened 2330 
> last night and seems to be more sensitive though that
> may be caused by something else. From 0010-0025 the the aerial
> current was reduced by 1/5 and the amp was switched off at 0040.
> The spectrogram shows the shows all the fun and games.  The freq.
> is a a bit high -- evidently the procedure that Markus
> guided me through is not being applied by the config file.
>
> The stability is better than can be measured against WWV (10 MHz) so 
> perhaps I will try  60 kHz (WWVB).
> Also last night, Spectrum Lab was reading an old Garmin Etrex
> GPS via rs232/usb.  DL4YHF has made provisions for doing this via the
> sound card.  Amazing!
>
> My aerial is in bits and pieces, tangled in the treetops and
> the halyards are frozen to the pulleys so we need a warm day
> before having a go at the far field!
>
> Which hill were you thinking of for a VLF grabber?
>
> Cheers
> Joe
>
>
> On Fri, 31 Mar 2017, DK7FC wrote:
>
>> Hi Joe,
>>
>> I changed the subject ;-)
>> The settings were not bad, just the delay/echo line was enabled, 
>> which is not necessary.
>> In attachment is another usr file with some more complex settings 
>> optimised for individual noise blanking on 8270 / 11904 Hz. Maybe it 
>> works a bit better. Just try and compare.
>>
>> If everything is configured fine then you should reach the far field 
>> easily. Maybe you can make a recording (wav file), 1 minute would be 
>> fine. Are you using the latest SL version?
>> How stable is your signal? Would be interesting to see a spectrogram 
>> of your own signal...
>>
>> A VLF grabber on the historic hill, what about that? :-)
>>
>> 73, Stefan
>>
>>
>> Am 31.03.2017 21:07, schrieb jcraig@mun.ca:
>>> Hi Stefan,
>>>
>>> It seems the delay is a blacksheep thing. Fortunately it doesn't 
>>> happen often.
>>>
>>> Your reception of my VLF will be a big day indeed. At the moment, the
>>> sigs appear to be constrained to the near zone. The best DX was 5.2 km
>>> using spectrum lab but this is now only about 1 km.  The signals are
>>> quite audible with a crude RX at 1.5 km. Evidently, this OM is not
>>> competent in SL operation.  Perhaps this can be verified by looking
>>> at the attached configuration file which was modified (bungled?) from
>>> Wolf's 8270Hz_QRSS_4mHz.usr.  The level range in the output file is 
>>> -145
>>> to -81 dB and the spectrogram shows a peak at 8277.16 Hz.
>>>
>>> Thanks for your offer to help!
>>>
>>> 73 and congrats to you and Paul again.
>>> Joe VO1NA
>>>
>>>
>>> On Thu, 30 Mar 2017, DK7FC wrote:
>>>
>>>> Hi Joe,
>>>>
>>>> Your recent emails came through now, with some delay since the 27th.
>>>>
>>>> Thanks for your kind words regarding ULF. We are waiting for your 
>>>> signal on VLF. A true RX challenge for me!
>>>>
>>>> If you need help with special SpecLab configs, we can arrange a 
>>>> Teamviewer remote access. I'm doing this daily now on various PC in 
>>>> various countries :-)
>>>>
>>>> 73, Stefan
>>>>
>>>> Am 29.03.2017 00:10, schrieb jcraig@mun.ca:
>>>>> attempt 4
>>>>>
>>>>>
>>>>
>>>>
>>