Why a ballon? If you want to keep it reasonably stable in the sky you need a LOT of helium and a BIG ballon. And i assume nobody wants to use hydrogen instead of helium when operating with some 10kV
Thank you for your report Paul. It reads very scientific if compared to my report, hi ;-) I'll keep rather writing as a fascinated dreamer who wants to share the euphoria with the others. But you do
Am 03.03.2010 12:50, schrieb Paul Nicholson: Yes, given a low Z source - no good for E-field rx. On the input of the E-field antenna i use a JFET (BF862), then a narrow band pass filter and after tha
The web sdr at http://websdr.pa3weg.nl/ does not show the alpha beacons, almost not. Why? Others explained that they can receive them with 20dB SNR? Stefan/DK7FC
But Uwe, With a 100m Vertical you reach 1W ERP with 20W TX power! So 1,2kW will be 60W ERP on 137kHz ;-) If you think about the ratio between achieved signal to the effort you have, this may be an al
Am 16.03.2010 14:08, schrieb Paul Nicholson: Thanks, that was a good field trip in the best amateur radio tradition. Ironic how we are at the same time using the most hi-tech, but also the simple bat
Hello Horst, This is the soundcard: http://shop.zeg-shop.de/shop/index.asp?id=120340&sid=2670421779 It costs 8,99 Euro ;-) It is nothing special but the advantage is that it is not installed in my no
The next important step is to convince DF6NM (and others) to buy such a kite! ;-) 73, Stefan Am 30.03.2010 10:50, schrieb Stefan Schäfer: Hi Johan, You are right but first i think (and hope) there wi
Very nice! 0,8m*0,8m is really practicable and easy to built for everyone. Not expensive too... And our distance is 655km, well above the garden ;-) I do not even see a too big difference in S/N comp
Tnx for all of your congrats! :-) This is a screenshot of DF8ZR/Bernd's reception in QRSS30 mode in a distance of 16km. DK7FC/P The RXers side is most important. A well optimised receiver, such as Pa
Dear Jim, group, OK so far. And what do you think will be the most suitable TX antenna type? The standard marconi as i will try it, with all its disadvantages (high coil and earth losses, high voltag
Hi Laurence, Fine! Do you wish to receive an amateur radio signal there down once time? Take a look on my dreamers band grabber (http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html).
Hi Paul, VLF, Am 17.04.2010 17:58, schrieb Paul A. Cianciolo: I wonder if you can point me to the schematic of your final amplifier? It would be nice to learn from amplifier building experience. Yes,
Hello Horst, Sorry, for the bugs. The 2nd JFET is also a BF862, yes. RG174 is just an example, you can use any coaxial cable or maybe twisted pair cable. "This evening" should have been "This weekend
Hi Rik, Yes, sure ;-) But i worry, that someone elso than me has to try this since it will rather be problematic to place my water barrel 70m up on the kite, HI. I am sure the effect/improvement will
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
