Again, Excellent Markus! So, do you automatically archieve the created pictures? What is the ideal QRSS mode for this resolution? I will try to create a nice line there in 178km! ;-) And Walter/DJ2LF
Thank you Joe and all the others! Joe, if i go to 300m, will you be QRV there? John/VE3EAR maybe also? 73 es gn, Stefan/DK7FC ________________________________ Von: [email protected]
Addition: When i replace the wire by a fixed capacitor of 570pF (470+100) i come to resonance at about the same frequency. So my antenna acts as a 580pF C on <9 just like on 137kHz. If you have a inv
Tnx Jay! That looks really nice and i got some additional infos about the signals one can receive there. I am not very confirmed in the VLF RX sector. Before some weeks, VLF didn't really interest me
I'll just ignore the problems that will occur, so easy is the game. There will be partial discharges at 10kV rms and not only at the end. Who tells that they are just to find at the end? Sure, there
Yes, sorry. I noted that mistake as the message was already sent. Normally i know it ;-) Alexander, it is important to give a good analysation of the received signal (and noise) if we want to get new
Good work Paul!! So 30mW ERP would be a good starting point. Will not be easy but we could start just with a simple carrier in QRSS-2400 ;-) 73, Stefan ________________________________ Von: owner-rsg
Hi Roelof, VLF, Yes, we (and others) arrived there on 137kHz and above. But it is so hard to belive that this is optimal even in the 33km band. Maybe the optimum C is not a function of the frequency,
Hi Rik, Paul, VLF, In the 2nd test, the maximum power was 250W but the 0,48A is the estimated average current (depending on the kite movement). The maximum current was about 0,55A, so the total resis
Dear VLF, Thank you very much for participating on that very successful activity! :-) It was really exciting and funny to be QRV from the hill although i knew that there will be no QSO, just transmit
Who has written that? Me? 73, Stefan ________________________________ Von: [email protected] im Auftrag von [email protected] Gesendet: Fr 19.03.2010 11:07 An: rsgb_lf_group@blac
OK Marco, thank you! And do you think that this grabber is well optimised? A professional equipment, such as Paul's? I do not run a own VLF RX, just the TX... ...in the moment. So i don't have really
Dear LF, I am sorry that it was not possible to transmit today. Maybe you have heard about the strong storm that damaged many trees and houses today. It wouldn't have been a good idea to be on the hi
Hello Clemens, Yes, sorry, i meant currents due to the stray capacitance between the windings, not due to a low ohmic resistance of their insulation. Stray currents surely also occur. Since its rated
Paul, LF, Which gain can be achieved with accuarte coupled multi loop receiving antennas? You told us you have a RX antenna out of 2 loops, coupled in a special way. Is it possible to built a loop th
Paul, Jim, Paul, if you wound a coil for me to resonate on 2 kHz, i will do it ;-) But if i get the special permission for 300m we could test on 8,97 but also on 5,18kHz (3*C => f=8,97/sqrt3=5,18) Ma
Sri, i have to correct that: If taking my 553mH and a Q of 82 one arrives at R = 380 Ohm. I mentioned a R of abt 300 Ohm but this is the DC resistance. The difference might be due to the proximity ef
Dear LF group, RXers and 9Dreamers and doubters, Thank you for your assistance on that very successful experiment! It is a good day for the VLF ham operations and it won't be the last. YOU are a part
Paul, LF, So, if we have the approx formula for VLF propagation and know the range of the noise floor at 8,97kHz, then what would be the TX power i have to apply to a 300m vertical to reach Canada/US
Dear Group, Recently i talked to Markus/DF6NM what has at least to be transmitted within a valid QSO in very slow DFCW. I mean a 2way contact, not a beacon reception report! Those of you (and others)
