Am 21.04.2010 06:19, schrieb Scott Tilley: Has anyone had a look on 153KHz and noted the relative QRG positions of the various broadcasters within EU on 153KHz? If so would you mind sending me your r
Hello George, So, welcome to the reflector!! I can read out your motivation in the text! Be sure you can get all needed informations to get QRV on LF. I am sure there are many people who will be inte
Paul, If you have not yet read much about LF/VLF antennas (for TX) i recommend the website of Rik/ON7YD: http://www.strobbe.eu/on7yd/136ant/ There, you get all basic necessary informations for becomi
Hi Rik, No, i do not have any filtering yet. And i do not even know the impedance level of the PA output / antenna input. I assume, it is below 50 Ohm. Let me calculate: With the used PA ferrite core
Der VLF dreamers, LF, I am glad to present you my new (and first) grabber for the dreamers band! It is running (in the web) not even one hour! Take a look at: http://www.iup.uni-heidelberg.de/schaefe
Dear VLF, Due to poor wind (http://www.windfinder.com/forecast/frankfurt) i cannot make a new experiment this weekend, i am sorry. The next weekend, i have no time, sorry. So, i hope we can get new s
Hi Daniele, I mean, it depends on the surroundings and the space you have for an (RX) antenna. If you live in the nature, e.g. in a farmers house without electrical energy except a solar panel, batte
Paul, This sounds fascinating. For me almost unbelivable that it is a recorded electromagnetic wave? It rather sounds as if someone who walks through the primeval forest with a microphone and a recor
Hi Jay, Others (than me) may answer your question better. I just want to say that i am happy that you improve your VLF RX :-) Maybe today or tomorrow i will set up my new VLF Grabber here in Heidelbe
Hey Paul, Congrats to that coil and the website! Believe me, i know about the work to wind such a coil. For me, it took 7 hours although i had a DC motor that rotated the water barrel for me. This ga
Hi George, Am 07.04.2010 08:34, schrieb George Vastianos: About the easyloop end 9 khz bf, never forget that: "A filter works correct and has the frequency responce that it was designed for... when t
Rik, Yes, maybe. But hopefully not at this weekend! ;-) 73, Stefan/DK7FC Am 13.04.2010 14:16, schrieb Rik Strobbe: Stefan, maybe thunderstorms coming up in the afternoon ? 73, Rik ON7YD Van: owner-rs
This is just a link to the diatnace to VTX, for increasing the fascination... http://www.iup.uni-heidelberg.de/schaefer_vlf/VTX_India.pdf 73, Stefan Am 29.05.2010 15:54, schrieb Stefan Schäfer: Hello
Dear VLF, In Spectrum Lab there are different methods for noise reduction (e.g. of lightnings). Those were discussed here in the last weeks. While Jim/M0BMU preferes the clipper (using 0 dB above AVG
Mike, Try to use just 65 % of the turns of your primary winding and i bet the optimum will be on 9 kHz! :-) 73, Stefan Am 31.05.2010 05:03, schrieb Mike.WE0H: Well worth testing. There might be some
Jacek, very interesting! So, it is worth to do a test with a large earth electrode antenna and moderate power (100W...500W) and a E field antenna. I would give a loop antenna a try too, as long as it
Dear VLF, At http://www.iup.uni-heidelberg.de/schaefer_vlf/12V_300W_VLF_PA.pdf you can get the circuit of my 300W PA i used at all the VLF experiments. The circuit is made in my well known simple han
Hello Horst, http://de.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=bf862 But you need to work in a business or know someone who works there to order. (Kein Verka
...means L(9kHz) = L(137kHz)*232 Am 15.05.2010 13:52, schrieb Stefan Schäfer: Mal, I assume you know your antenna capacitance so you can easily calculate your needed inductance. Or, if you know
The ALPHAs seem to come back! They have transmitted for a while during 10 and 11 UTC today. Currently they are ON too! In the last days they started transmitting for just a short while (some minutes)