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1. LF: AW: Re: DK7FC/p qrv this evening on 137kHz (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 03:47:33 +0100
Dear Marcin, My /p ground is a copper band of about 20cm x 25m x 1mm (abt 25kg, so no problem in the wind) With this band, just rolled out within 1...2 Minutes I get a overall loss resistance of 50..
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00076.html (12,415 bytes)

2. LF: AW: Re: AW: 4kv diode (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Mon, 30 Nov 2009 10:52:56 +0100
Hi Ken, We have ordered these diodes before some years at: Getronic GmbH Warnstedtstr. 57-59 22525 Hamburg Tel +49-40-54744-100 Fax +49-40-54744-150 Sorry, I don´t know a distributor in the UK How mu
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00077.html (21,602 bytes)

3. LF: AW: Re: DK7FC/p qrv this evening on 137kHz (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sat, 28 Nov 2009 19:58:35 +0100
Hey Jay, tnx! I will start NOW, that means i put everything in my car and drive on the mountain/hill in JN49IS. So it still takes 60 to 90 mins to see/hear the first sigs. How long I stay, that will
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00089.html (12,482 bytes)

4. AW: LF: DK7FC/p qrv this evening on 137kHz (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 03:55:04 +0100
Hey Dmitry, Also tny for the QSO and the picture! Sri for my rx problems. The BF981 in my Converter seems do be damaged and so I had to use the IC706 instead of the K2 ;-) Your locator is KO73DG? Tha
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00198.html (10,680 bytes)

5. AW: LF: DK7FC/p (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 17:54:05 +0100
Hey Andrej, LF Thank you very much! That is a great motivation form e and i will spend time and energy to reach a better RX and then we will surely get a qso! Yesterday, as I have put everything in t
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00319.html (10,678 bytes)

6. AW: LF: DK7FC/p qrv this evening on 137kHz (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 03:39:00 +0100
Hello Markus! Now it´s half past 3 in the nigeht and i am back ;-) Thanks for your infos! 120µV/m, what does this mean for my calculated ERP? I´ve never got such a field strength rprt yet but we coul
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00428.html (21,322 bytes)

7. LF: DK7FC/p qrv this evening on 137kHz (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sat, 28 Nov 2009 11:36:43 +0100
Dear Lowfers, This is my first mail to the reflector and so i want to say hello to all :-) It´s nice to be able to participate now here although my activity will stay on the band mostly ;-) If there
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00482.html (10,840 bytes)

8. LF: LF Propagation literature? (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 19:25:11 +0100
Hello Lowfers, Is there any good literature in the web (web-site or pdf or book) about the propagation on LF? Best would be, if it is created by a ham for the hams! 73, Stefan/DK7FC
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00597.html (10,241 bytes)

9. LF: AW: 4kv diode (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sun, 29 Nov 2009 19:05:59 +0100
Hi Ken, My hint is to try a BV8 Diode. It is able to take 500mA. On my work, I have good experiences with the BV16, the 16kV Version. Each one costs abt 1. Three in parallel, thermal coupled, should
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-11/msg00800.html (13,264 bytes)

10. LF: Noise cancelling by using optic transmission of RX signals; amendment (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Thu, 17 Dec 2009 01:00:36 +0100
Hi Dave, LF, Yes, a transverter would be an other possibility but it would be much more complex I think, just when regarding the needed power (compared to a LED). And you would get new problems when
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00017.html (22,268 bytes)

11. AW: AW: LF: "Gain" between qrss3 and qrss10? (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 15 Dec 2009 13:44:07 +0100
Mni tnx Rik for your answer! No, you didn&#8217;t spoil the fun at all ;-) I have some remarks/ideas. The coil losses increase linear with the power but not more than linear. So, 10x the power wouldn
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00062.html (16,903 bytes)

12. LF: any traffic this evening? (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 1 Dec 2009 15:28:38 +0100
Dr LF Group, Will there be any activity this evening? I want to try my RX-Antenna and need some signals, if possible in QRSS3/DFCW3. If it will, I would drive to &#8220;my&#8221; hill and do some tes
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00066.html (9,678 bytes)

13. LF: AW: Question to Antenna Experts (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Mon, 7 Dec 2009 10:12:49 +0100
Hallo Gerhard, Gratuliere zu dem Wandler! Das ging ja schnell :-) Wegen der Anzeige: Welches Gerät verwendest du denn? Ein analoges Dreheisenmessgerät ist beispielsweise unempfindlicher gegen HF-Eink
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00071.html (12,059 bytes)

14. LF: AW: Re: "Gain" between qrss3 and qrss10 / PA design (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 15 Dec 2009 15:51:16 +0100
Hello Jim! First i want to say that i am glad to meet you here. Do you remember our QSO in 2004? And mni tnx for your article to the tuning meter (and others)! I have built it 2003 and it is for me t
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00097.html (20,419 bytes)

15. LF: AW: "Gain" between qrss3 and qrss10 / PA design (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Wed, 16 Dec 2009 16:11:00 +0100
Dear Jim, LF, Thank you for these explanatory notes. And i have nothing to disagree ;-) Yes, with a B2 recifier, the "minus-pole"/ground have a potential to earth and so an isolating transformer is n
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00104.html (17,523 bytes)

16. AW: LF: AW: [Fwd: Extra transmission with SAQ Dec 10 2009] (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Fri, 4 Dec 2009 14:01:58 +0100
Hi Rik! Glad to meet you here. Congrats to your websites! I&#8217;ve often taken a benefit from it!! I don&#8217;t know abt &#8222;von&#8220;. (Is that question meant true? J ). It&#8217;s not soo im
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00111.html (17,571 bytes)

17. AW: LF: "Gain" between qrss3 and qrss10? (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Fri, 11 Dec 2009 21:49:42 +0100
Rik, LF, Tnx for your detailed explanations! I will not forget it any more! :-) CU tmw or Sunday! Stefan / DK7FC PS: I just bought my new and biggest kite ever: 8,1m^2, that needs a 500kg braid and j
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00134.html (12,993 bytes)

18. LF: LF/MF (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sat, 26 Dec 2009 17:36:21 +0100
Why are the topics affecting 500 kHz not marked as "MF: ..." in the subject? I thought this is the reason why we write "LF: ..." in the subject of mails affecting 137 kHZ? Or have I misunderstood "th
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00178.html (10,319 bytes)

19. AW: LF: "Gain" between qrss3 and qrss10? (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 15 Dec 2009 12:54:44 +0100
Well, if I apply 1kW to a bad antenna and get 100mW ERP, then 10kW will get 1W ERP and this is thus not nonsens of the legal limit regs but rather a gain of 10 dB. The same when you increase from 100
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00193.html (12,758 bytes)

20. AW: LF: Results of optimising an active antenna (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Thu, 3 Dec 2009 11:12:20 +0100
Dear Lowfers, It's nice/funny, that my explanations gets such a resonance ;-) I can imagine about the problem of local QRM brought by the coax to the preamp. That brings me to new ideas at once. But
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-12/msg00200.html (10,528 bytes)


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