Wow, DHO38 is on air now and seems to transmit a CW carrier. This carrier is 60 dB (!) above noise in 1,46 Hz (without NB) on my grabber. The strongest far field signal i ever saw on VLF :-) Have the
Hi Tony, That sounds good. What will be the hight above ground of that wire? And are there many trees and buildings in the near of that or just shore? :-) 73, Stefan Am 23.06.2010 11:21, schrieb Tony
Hey Wolf, Very nice!!! Congrats to your practical experiment!! Are you still transmitting? Sorry, i did some adjustments on grabber2 (yesterday i changed something that increased the signal but decre
Hello Roelof, Am 13.07.2010 19:54, schrieb Roelof Bakker: I have an external soundcard which has a 192 kHz sample rate. This makes it possible to receive 0-96 kHz on your soundcard with excellent res
Hello Rik, Assume, i will increase the wire length or electrode spacing to 1200m this will not only be a full size dipole for 137 kHz but on 9 kHz the area might become 480000 m^2. Then, 1,75 A is ne
Hello Andy, Maybe you can try a even higher antenna mast. I think there are some fiber carbon masts of 18m length. This could give you even more efficiency and would be a more easy to handle arrangem
Hello Rik, VLF, Yesterday i have measured the receiving voltage of DHO38 on my earth antenna. I used an impedance converter with an OP AMP, so the input impedance can be seen as infinity. I got a sig
Hello Marcin, Am 05.07.2010 00:34, schrieb Marcin SQ2BXI: Maybe next club meetings, friday, well be QRV on dreamers band? We have last problem with stability signal generator to QRSS 600. 73! Marcin
Gary, Interesting! There one can see the propagation optimum between RX and TX. Normally the screenshots have no time information... Tnx, 73, Stefan Am 27.07.2010 13:29, schrieb Gary - G4WGT: Hi LF,
Roger, VLF, I will check the resonance curve in the next experiment. Maybe it is higher than expected due to the high R in that RLC-circuit... So maybe there are even some many Hz available... Stefan
Dear LF/VLF group, It took a long time to get a proper wind forecast in a time sector where i can do a kite experiment. Also it took a long time to get the special permission for the new kite antenna
Gary, Yes. And, the "5" could be OE5ODL! Maybe if it appears again you can check the DF6NM LF grabber. If it is very strong there you can see it almost as a confirmation for this... 73, Stefan
Hello Alan, Thanks for sharing your knowledge! Maybe i will have some questions to you in some months when i want to come back to 137 with the 300m vertical... I am not an expert in interpreting the
Alan, Which time (UTC) would be your recommendation for trying a transatlantic DX reception on 9 kHz, say to canada? Any ideas? Other experts are asked as well here!
Hello Jim, VLF, Thank you for your helpful suggestions! Es tnx for calculating the FS at the earth antennas QTH! This was what i didn't know how to do ;-) Yes, i have a low pass filter attached at th
Hi Rick, Am 17.08.2010 11:10, schrieb Rick Wakatori: This is an example of sending by the two earth electrodes antenna. I hope more experimeters will got a same trend. 7L1RLL Rick This weekend, i pla
VLF, On http://abelian.org/vlf/ss100801/ you can find Paul Nicholsons most interesting final report on his reception and filter processing of this 6470 Hz experiment. 73, Stefan/DK7FC
Dear LF, Currently i am setting up my active antenna for the planned LF grabber here in Heidelberg. It is an active E field antenna, using a BF981 and a 125 kHz signal that transforms the 137 kHz dow
Henny, Very impressing! Go on with that job! 73, Stefan Am 27.08.2010 11:16, schrieb henny van elst: Hello Warren,LF nice capture XGJ,strong signal Henny pa3cpm best 73s Het bericht kan nu met het vo
