TNX Marcin!
> Roman!
>
> 2km in mobile magnetic loop RX station.
>
> 73! Marcin
>
> -----Original Message-----
> From: [email protected] <[email protected]>
> On Behalf Of Roman
> Sent: Tuesday, July 24, 2018 9:38 PM
> To: [email protected]
> Subject: Re: LF: RE: Earth antenna transmissions on a guide rail?!??
>
> Hi Marcin!
>
> Whats QRB?
>
> Roman
>
>> Hello Stefan!
>>
>> The signal-to-noise ratio of the movie is very good. The experiment is
>> interesting and inspired me.
>>
>> In January we tried to transmit on 8.27 kHz from a horizontal loop antenna.
>> Team SP5WPK, SQ5BPF and SQ2BXI stretch the 500m wire. Ground was very good,
>> by the river. The effect was not good. Information about the experiment in
>> Polish:
>>
>> https://klubnl.pl/wpr/en/index.php/2018/02/10/nadawczy-eksperyment-z-duza-pozioma-antena-petlowa-na-827khz/
>>
>> 73! Marcin SQ2BXI
>>
>> From: [email protected]
>> <[email protected]> On Behalf Of DK7FC
>> Sent: Monday, July 23, 2018 11:18 PM
>> To: [email protected]
>> Subject: Re: LF: RE: Earth antenna transmissions on a guide rail?!??
>>
>> Hello Marcin,
>>
>> Oh, from LA3EQ, we know that man, at least from the LF/MF WSPR database. If
>> i remember correctly he has been here ion the list some years ago.
>>
>> Listening from an antenna which is so close to the road? Should sound funny.
>> But i've been a bit disappointed, he just connected the coax between two
>> very close disconnected parts of the guard rail. First i thought he
>> installed an isolated (!) wire of 8 km length. These two segemnts should
>> form a very small ground loop only. Of course it will generate some signal
>> voltage. The Alphas were visible too. But what about ZEVS and the
>> Schumann's, if he's talking about 10 Hz?
>>
>> Meanwhile i thought a bit more about the preparations. I think i'm going to
>> use that 0.4 mm diameter enameled cu wire that i have laying arround here,
>> about 2000m is available from the unwound part of the 2.97 kHz coil. For the
>> first test on the 450m distant guide rails this should work reasonably. The
>> DC resistance will be about 65 Ohm which could be a significant part of the
>> overall loss, hopefully :-) But then i'll have an impression of the earth
>> electrodes resistance.
>> So i need to prepare a GPS locked signal generator and PA and a suitable
>> output transformer providing something between 50...350V at 8.27 kHz...
>>
>> 73, Stefan
>>
>> Am 23.07.2018 21:28, schrieb Marcin:
>>
>>> Hello Stefan
>>> A very interesting idea for an experiment.
>>> Looking at the video below should get good results.
>>>
>>> https://www.youtube.com/watch?v=sWsdaSmWg7E
>>>
>>> 73! Marcin SQ2BXI
>>>
>>> From: [email protected]
>>> <[email protected]> On Behalf Of DK7FC
>>> Sent: Sunday, July 22, 2018 8:28 PM
>>> To: [email protected]
>>> Subject: VLF: Earth antenna transmissions on a guide rail?!??
>>>
>>> Hi all,
>>>
>>> During the weekend i am in the Pfälzer Wald again which is such a nice
>>> place to be! I already installed a fixed E field antenna for VLF/ULF
>>> reception in JN39XI06 :-)
>>>
>>> Now i have the idea to use a guide rail (attachment!) as an electrode for a
>>> earth electrode antenna! There is a perfect road which is not much
>>> frequented and where no way is crossing so i could temporary install a long
>>> wire on the ground between two of these guide rails. I would assume they
>>> provide a good grounding. They are located on a relatively high
>>> hill/mountain with stony ground. The mountain is very steep there and in
>>> some distance, 200m deeper, there is a brook..
>>>
>>> With some luck the ground losses can be near 200 Ohm? Maybe rather 300 Ohm.
>>> I'm going to prepare things and plan to transmit for some time next
>>> weekend. If the ground loop actually acts like a loop, the bearing should
>>> be 135 deg, so it will be in a 45 deg angle towards my QTH where my grabber
>>> is listening in 55 km distance. That's quite a good distance for testing!
>>> I'd like to try LF and VLF, maybe ULF it all works well.
>>>
>>> A BTW the wire length will be 860 m! However there are two guide rails in a
>>> shorther distance, about 450 m. I will try the shorter length first, to get
>>> an impression of the loss resistance and to see if something is visible at
>>> all :-)
>>>
>>> 73, Stefan
>
> --
> 73!
> Roman, RW3ADB
--
73!
Roman, RW3ADB
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