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21. LF: GI3KEV location? (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Tue, 16 Nov 1999 21:54:55 +0100
I just worked Mal, GI3KEV on 136. What is his exact location/locator? Cookstown? 73 Christer
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00110.html (7,942 bytes)

22. LF: Antennas and radio propagation litterature (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Sun, 28 Nov 1999 16:55:55 +0100
Have a look at http://www.buck.com/tm11-666.htm 236 scanned pages. 73 Christer, sm6pxj
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00229.html (7,789 bytes)

23. LF: All systems running (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Mon, 13 Dec 1999 20:41:06 +0100
Hello all, As you may have heard my 27 m vertical crashed in the hard winds we had recently. I have now built a new one, 23 m high and with larger diameter of the tubes (200-160-125-100 mm). I have a
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-12/msg00055.html (8,273 bytes)

24. LF: SAQ - additional information (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Thu, 16 Dec 1999 22:48:23 +0100
Some new information from SSA news bulletin: "The radio station in Grimeton will be active on the following times: Jan 01 2000: 12.00, 12.30 and 13.00 UTC. Jan 02 2000: 06.00 UTC. Each transmission w
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-12/msg00080.html (8,034 bytes)

25. LF: Information source (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Sat, 25 Dec 1999 23:39:10 +0100
Lots of antenna ideas can be found at: http://www.patents.ibm.com/boolquery A search for "VLF" gives 70 hits in US patents, e.g. "Low height VLF antenna system". 73 Christer SM6PXJ
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-12/msg00131.html (7,842 bytes)

26. LF: Below 9 kHz (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Sun, 26 Dec 1999 13:03:25 +0100
Hello all, I have a small question. What stops us from beginning experimenting on, say, 8 kHz? If I have understood things right, frequencies below 8,999 kHz is not allocated by the ITU, neither regu
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-12/msg00132.html (8,025 bytes)

27. LF: 137,0 (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Wed, 5 Jan 2000 19:40:51 +0100
Hello All, I believe most of the LF guys have a rotary loop antenna. Couldn't we make some observations on the direction of the unknown signal and then compare the results? Or is the signal too weak?
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00027.html (7,933 bytes)

28. LF: 35 km band (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Fri, 14 Jan 2000 18:47:12 +0100
Hello Lowfers, Today I received permission from the authorities to transmit between 7-8,5 kHz with maximum 1kW out from the transmitter. "The transmitter shall be designed according to the regulation
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00132.html (8,626 bytes)

29. LF: Sound card receiver (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Mon, 17 Jan 2000 20:20:00 +0100
Sometimes I use my sound card as a VLF receiver, using Spectrogram and the antenna connected to the mic input. It would be nice also to listen to the signals. What software/procedure to use? 73 Chris
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00173.html (8,124 bytes)

30. LF: Loading (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Mon, 17 Jan 2000 20:11:31 +0100
I have some thoughts concerning loading of a vertical. Often it is impractical to use centre loading. Assume I have an existing 20 m high vertical. Take a wooden pole, 10 m high. Put a loading coil a
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00174.html (7,963 bytes)

31. Re: LF: Sound card receiver (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Tue, 18 Jan 2000 06:50:38 +0100
Is there a way to change the pitch of the incoming signal (in realtime), do some filtering etc? sm6pxj
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00184.html (7,963 bytes)

32. LF: SV: callsign game (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Tue, 18 Jan 2000 21:23:00 +0100
de sm6pxj sm6pxj/p sm6pxj/m Once I even saw the Swedish King at a distance less than 50 meters... A merit that falls in the same cathegory. </irony>
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00204.html (7,563 bytes)

33. LF: Tuned counterpoise (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Fri, 21 Jan 2000 13:56:31 +0100
I came across an article from "Electronics World" Feb 1990. "Reducing mast height at MF". Tuned counterpoises are treated and some real world references are given. I can send a scanned copy upon requ
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00257.html (7,958 bytes)

34. LF: 8 kHz loading coil (score: 1)
Author: "Christer Andersson" <[email protected]>
Date: Sat, 29 Jan 2000 09:17:06 +0100
Hello (V)LF experimenters, I have an idea of resonating my existing vertical on 8 kHz. Is there a practical way to construct a 600 mH loading coil, withstanding 3-4 A and high voltage? Any *large* to
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00337.html (8,519 bytes)

35. LF: New stations QRV from OH (score: 1)
Author: "C Andersson" <[email protected]>
Date: Wed, 2 Feb 2000 21:13:25 +0100
Hello, I just worked OH1BS and OH7OL on 136. OH7OL/Reino lives in Joensuu in the very eastern part of OH. His QTH should make him attractive for the distance record hunters. I like his antenna descri
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00035.html (7,755 bytes)

36. SV: LF: SV: Re: Special LF event - new attempt - 7S6SAJ (score: 1)
Author: "C Andersson" <[email protected]>
Date: Thu, 3 Feb 2000 21:26:37 +0100
Well, what is the ... ahem ... expected input V x I to the drains of your final transistors, gentlemens? Assuming a PA efficiency of 0.1%, of course ... Actually we have a special permission from the
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00043.html (8,693 bytes)

37. LF: Field strength measurements (score: 1)
Author: "C Andersson" <[email protected]>
Date: Fri, 25 Feb 2000 21:06:03 +0100
Hello All, Last weekend I made some field strength measurements on my own station. http://home5.swipnet.se/~w-54761/fs.htm I use an untuned loop and a selective level meter. The output from the loop
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00254.html (7,986 bytes)

38. LF: Field strength revised (score: 1)
Author: "C Andersson" <[email protected]>
Date: Sun, 27 Feb 2000 22:09:46 +0100
Hello All Thanks to PA0SE for suggesting the calibration method. I tried this method this evening and believe I'm somewhat closer to the truth... Obviously the measuring loop with the connection wiri
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00281.html (8,457 bytes)

39. SV: LF: Field strength revised (score: 1)
Author: "C Andersson" <[email protected]>
Date: Mon, 28 Feb 2000 19:29:48 +0100
If you calibrate the loop it is not nessecary to use an untuned loop. If you use a tuned loop the output voltage will be much higher (factor Q, can easily be 100 or more). This will allow to measure
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00299.html (8,570 bytes)

40. SV: LF: Field strength revised (score: 1)
Author: "C Andersson" <[email protected]>
Date: Mon, 28 Feb 2000 19:34:10 +0100
OH2LX: Just curious - how do you calculate your Fs. P=0,0111*(E*d)^2 (P in W, E in mV/m, d in km) Main point is that you have very good signal!! Maybe. Just interested to see if it is possible to mak
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00300.html (8,558 bytes)


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