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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: ehm... Roman Stefan just mistyped drone instead of done ;-)73 Marco IK1HSS ----Messaggio originale---- Da: 27-giu-2019 11.50 A: Ogg: Re: ULF/VLF: amateur stair case / carrier transmissions Gut Abend Genosse Funkamateur Stefan! 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Roman Stefan just mistyped drone instead of done ;-)73 Marco IK1HSS ----Messaggio originale---- Da: rw3adb@YANDEX.ru Data: 27-giu-2019 11.50 A: Ogg: Re: ULF/VLF: amateur stair case / carrier transmissions Gut Abend Genosse Funkamateur Stefan! Do not understood exactly - whats model of drone? Quadrocopter? 20 min so little time, of course. We are discuss about transmit power for copter by wires from the ground, not batteries. 73! Roman > Hello Genosse Funkamateur Roman, > > I'm sorry, the 'drone' was just a typo. I simply meant 'done' instead. > > 73,Stefan > > Am 26.06.2019 10:58, schrieb Roman: > >> Guten morgen Genosse Funkamateur Stefan! >> >> Congrats with your success! >> >> Let us to know more details about drone antenna? >> We are discuss about that way in 2011 on 136.su forum. >> Very interesting! >> >> 73! >> Roman >> >>> Hi all, >>> >>> Today, some 20 minute long carrier transmissions were drone from JN39WI >>> again. The main intention was to calibrate my local RDF spectrogram >>> (still to be done) in the range below 16.4 kHz (JXN) and above 82 Hz >>> (ZEVS). So that was a amateur radio ULF/VLF staircase somehow, despite >>> the weak signal strength relative to commercial transmitters. >>> >>> It was a hot day! Far> 30 C here. I started early in the morning and >>> enjoyed the fresh air in the forest. >>> >>> The DC resistance of the 1130m ground loop increased to 73.2 Ohm >>> (measured at 1 A) due to the dry soil. It confirms the dependency shown >>> in the last year! In 2018 i saw the resistance rising up to 94 Ohm in >>> late October, then it dropped to 57 Ohm (-40 %) in just 2 months. >>> >>> It was interesting to see that the antenna current is much higher at >>> lower frequencies (always at resonance | the PA output voltage is nearly >>> constant). This effect was very clearly expressed. >>> >>> IF of interest for other stations (having a data storage): >>> >>> Frequency/Hz Start time/UTC Antenna current/A >>> 970.005 2019-06-25_08:36:20,+20m 2.26 >>> 2970.005 2019-06-25_08:13:30,+20m 2.19 >>> 5170.005 2019-06-25_07:51:00,+20m 2.09 >>> 8270.005 2019-06-25_07:23:00,+25m 1.85 >>> end of the official part. >>> >>> BTW, since a few days, the VLF RX site at DL0AO has a 3 axis VLF >>> receiver recording data from a Octo-soundcard and a Raspberry pi 3, >>> saving data to a 4 TB HDD so there is one more station that won't miss >>> anything from now on (for example unannounced transmissions by SAQ). >>> >>> Some spectrograms may be shown later. >>> >>> Evetually there was a problem with the sample rate correction due to the >>> upheating car, which caused a high deviation of the tracked sample rate. >>> The max allowed range of 10 ppm was left in the end of the experiment >>> but this was noticed a bit late, maybe. >>> >>> 73, Stefan -- 73! Roman, RW3ADB ------=_Part_31219_7671475.1561630791806 Content-Type: text/html;charset="UTF-8" Content-Transfer-Encoding: quoted-printable
ehm... Roman
Stefan just mistyped drone instead of done= ;-)
73 Marco IK1HSS

----Messaggio originale----
Da: rw3adb@YANDEX.ru
Data: 27-giu-2019 11= .50
A: <rsgb_lf_group@blacksheep.org>
Ogg: Re: ULF/VLF: amateur= stair case / carrier transmissions

Gut Abend Genosse Funkamateur St= efan!

Do not understood exactly - whats model of drone? Quadrocopter= ?
20 min so little time, of course.
We are discuss about transmit pow= er for copter by wires from the ground, not batteries.

73!
Roman<= br>
> Hello Genosse Funkamateur Roman,
>
> I'm sorry, th= e 'drone' was just a typo. I simply meant 'done' instead.
>
> = 73,Stefan
>
> Am 26.06.2019 10:58, schrieb Roman:
>
= >> Guten morgen Genosse Funkamateur Stefan!
>>
>> C= ongrats with your success!
>>
>> Let us to know more deta= ils about drone antenna?
>> We are discuss about that way in 2011 = on 136.su forum.
>> Very interesting!
>>
>> 73!<= br>>> Roman
>>
>>> Hi all,
>>>
&g= t;>> Today, some 20 minute long carrier transmissions were drone from= JN39WI
>>> again. The main intention was to calibrate my local= RDF spectrogram
>>> (still to be done) in the range below 16.4= kHz (JXN) and above 82 Hz
>>> (ZEVS). So that was a amateur ra= dio ULF/VLF staircase somehow, despite
>>> the weak signal stre= ngth relative to commercial transmitters.
>>>
>>> I= t was a hot day! Far> 30 C here. I started early in the morning and
&= gt;>> enjoyed the fresh air in the forest.
>>>
>>= ;> The DC resistance of the 1130m ground loop increased to 73.2 Ohm
&= gt;>> (measured at 1 A) due to the dry soil. It confirms the dependen= cy shown
>>> in the last year! In 2018 i saw the resistance ris= ing up to 94 Ohm in
>>> late October, then it dropped to 57 Ohm= (-40 %) in just 2 months.
>>>
>>> It was interesti= ng to see that the antenna current is much higher at
>>> lower = frequencies (always at resonance | the PA output voltage is nearly
>&= gt;> constant). This effect was very clearly expressed.
>>><= br>>>> IF of interest for other stations (having a data storage):<= br>>>>
>>> Frequency/Hz Start time/UTC Antenna current= /A
>>> 970.005 2019-06-25_08:36:20,+20m 2.26
>>> 29= 70.005 2019-06-25_08:13:30,+20m 2.19
>>> 5170.005 2019-06-25_07= :51:00,+20m 2.09
>>> 8270.005 2019-06-25_07:23:00,+25m 1.85
= >>> end of the official part.
>>>
>>> BTW,= since a few days, the VLF RX site at DL0AO has a 3 axis VLF
>>>= ; receiver recording data from a Octo-soundcard and a Raspberry pi 3,
&g= t;>> saving data to a 4 TB HDD so there is one more station that won'= t miss
>>> anything from now on (for example unannounced transm= issions by SAQ).
>>>
>>> Some spectrograms may be s= hown later.
>>>
>>> Evetually there was a problem w= ith the sample rate correction due to the
>>> upheating car, wh= ich caused a high deviation of the tracked sample rate.
>>> The= max allowed range of 10 ppm was left in the end of the experiment
>&= gt;> but this was noticed a bit late, maybe.
>>>
>>= > 73, Stefan
--
73!
Roman, RW3ADB



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