Thank you Jim! There was no chance to get your signal. I am living in a student living coounity, for 2 months. In each room there is a PC, so i assume the noise level is very high here. The E-field a
Ok Alan, but what is the difference between a ground stake and the alu foil, when talking about the resistive losses? That would be also a poor quality ohmic connection, isn't it? And think about how
Hi Alexander, LF, Yes, i assumed the Q of the coil to be very high due to the big wire that is used in it. But thus the internal C is high, so stray currents occur that increase the resistive losses.
Hello Paul, Thank you! And nice that you are also active at the TX front. This is necessary to keep the VLF ham interest alive ;-) In my notes at qrz.com there are some average values, some estimated
Hello Victor, As i meant, i am still not sure if it will be this weekend. But i will inform you... 73, Stefan ________________________________ Von: [email protected] im Auftrag von v
Paul, LF, Tnx for the calculations. Today i again added some turn to the coil. Now it has L = 550mH, just optimal. My antenna has C=580pF (measured on 137kHz). When theoretically calculating the C of
Jim, What do you think is the reason why you measure just 340pF on a 55m wire? And which C do you measure at 137kHz on the same antenna? What do you think is the accuracy of your measurement? 300 Ohm
Dear Claudio, VLF, I have found your summary of the last VLF experiments in the web, http://lnx.arimi.it/Site/public/NR288.pdf It is interesting to read although my italian language knowledge is real
Paul, the values you measured seem to be realistic for me. Especially the measured antenna C does not really differ very much between 137kHz and 9 kHz. It is a good value that allows you to dimension
Hi Uwe/DJ8WX, Could you tell us what was your RX setup last week? There are some discussions about E field antennas and loop antennas for VLF reception. Your S/N was very good! Have you used norrow b
Henny, thank you! That's nice. Your RX stn is very good on LF and i am sure you will also have a good VLF RX :-) What is our distance? I think less than 400km!? Let's dream :-) 73, Stefan PS: The nex
Paul, the TX power was up to 300W and the current arround 530...570 mA, so an optimal ERP of abt 2mW. The wind was strong and the kite at a high angle for the most time! Jim, M0BMU is the 2nd best DX
Nice pics Andrey! Congrats! What is the distance to the stations? Where are they located? Maybe, if things on VLF are much better than expected, we could do a try. Your antenna is very good, right? T
Interesting material! Should be a part of our HV discussion, not just on VLF http://en.wikipedia.org/wiki/Polytetrafluoroethylene http://de.wikipedia.org/wiki/Polytetrafluorethylen 73, Stefan/DK7FC _
Hello Paul, LF, I plan to transmit on 8,9700 kHz. Maybe, if i am in phone contact during the test i make QSY of some Hz if the RXing station has a carrier/line on this QRG. Or would this be a problem
...will be most probably tomorrow, the 15. March. Due to best wind forecasts, no rain and moderate temperatures i plan to do my 2nd VLF TX test in the afternoon on 8,9700 kHz. It is the first time th
Hi Roelof, Have you checked what happens with the SNR if you increase the probe C, say to 10pF? 73, Stefan ________________________________ Von: [email protected] im Auftrag von Roel
Hey Wolf, LF, A VLF grabber would be very fine! If you can arrange that, it would perhaps be a motivation for the dreamers ;-) A cooling of the coil will not be necessary unless i exceed the 1kW leve
Many Congrats Markus! Excellent activity and report! We have to do a 2 way QSO! You have to promise that ;-) In spring 2010 we should spend some hours for this. Maybe others will follow so that it wi
