Hello Peter, VLF, Am 22.05.2010 11:33, schrieb pws: Stefan, you are observing well known sunrise/-set effects and your monitor works fine now. I rather think that the amplifiers gain is now much more
Hello Marco, You still can see on the grabber that it was switched out on saturday night until now. There is 3 hours time difference to UTC so it is switched out at 21UT. This happens each few weeks.
Hello Jim, Am 16.05.2010 18:20, schrieb James Moritz: So a negative result here this time, although I see signals were visible at DF6NM and DL4YHF - how was reception on the vertical antenna? Cheers,
Mal, I assume you know your antenna capacitance so you can easily calculate your needed inductance. Or, if you know your L for 137kHz, it will be about (137/9)^2 at 9 kHz! Stefan/DK7FC Am 14.05.2010
Mal, No, it is OFF again. It was on just about 15 minutes. Later i checked this trace and ALPHA F1 @ 11904.762 Hz was 40dB above noise in 424 µHz. 73, Stefan Am 31.05.2010 19:48, schrieb mal ha
Dear LF, For the discussion: This is a picture of the TV transformer antenna arrangement i used: I just started another try but there was a strong thunderstorm going over Heidelberg with many lightni
Hello Daniele, This done by a special TX LED (SFH750V)that is switched into the line (Drain to +) of the second FET of the active antenna. 73, Stefan Am 13.05.2010 22:42, schrieb Daniele Tincani: Hel
VLF, Just for the small group of VLF grabber interested OMs: To check the new location for my grabber i have set up a second grabber page that displays the signals of the test setup antenna with fibe
Dear group, Now i have updated my website. There are some pictures and a description of the last experiment. The new > 500W PA is displayed and a screenshot of my grabber in DFCW-600 mode. For those
Hello Victor, LF, It took a little bit to reply to your answer. You have been absolutely right! DLF(153kHz) is here just some 10km away and the strong french LF broadcast station on 162kHz has caused
Dear VLF/LF, Am 19.05.2010 21:11, schrieb Jacek Lipkowski: a much better test of antennas would be if people can receive SAQ with the key up (when it is not transmitting) - i don't know what the outp
Hi Andrey, Nice to cuagn! Interesting! On which frequency is the transmitter now? 73, Stefan Am 30.06.2010 12:37, schrieb rn3agc: Hi (V)LF, Today periodically the signal has been modulated, including
LF, VLF, Once i have created an Excel sheet for calculating my vertical kite antenna on 137 kHz. Today i want to share it with you. It is in german language but usable for everyone anyway i think. It
Yes, i can imagine that. Especially such attachments are most often classified as "unsafe". But in this case, you know, they aren't ;-) 73, Stefan Am 01.06.2010 12:19, schrieb mal hamilton: Stefan So
Dear VLF, As mentioned in the subject i have done a test on 8,97 kHz today in the morning, where the natural QRN has it's lowest level during the day. I used a 120m long wire antenna that was placed
Mal, Are you sure? Send us a screenshot of that signal. I do not see anything here! (12:40 UTC) Stefan Am 02.06.2010 14:45, schrieb mal hamilton: VLF Just ckd and Alpha is back so now I know my RX sy
Rik, Roger, VLF, What i want to try is to "couple" two rivulets that are running down on different sides of a mountain. Each one could act as a conductor regarding the different conductances of water
Wolf, You are running 2,9 kVA or really 2,9 kW? Impressing! Which PA are you using? This is the advantage of having a mains connection! ;-) For a loop this is no problem but if i apply that power on
Wow, nice, congrats! What was the mode in which you have transmitted? QRSS120? You could try such a TV transformer. That may give you easily 30dB more power (depending on your losses), so you could r
Dear LF/VLF, Today i spent more than 8 hours in the forest on a hill 520m ASL, improving and experimenting with my VLF earth antenna. It was a fantastic and very successful day that gave a lot of fun
