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Total 611 documents matching your query.

221. RE: LF: VLF Small magnetic antenna for Tx (score: 1)
Author: "Clemens Paul" <>
Date: Mon, 5 Feb 2018 19:15:39 +0100
Hi Leandro, One of your questions was: even in the near field of a magnetic transmitting loop at 38.4kHz and at 100m distance while in the far field the E-field is 51.5dB stronger. 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00062.html (12,080 bytes)

222. LF: RE: Simple transverter for 472kHz (score: 1)
Author: "Clemens Paul" <>
Date: Thu, 8 Feb 2018 14:19:48 +0100
Here is a ready to go transverter from an Australian dealer. http://www.monitorsensors.com/ham-radio/630m-transverter Not cheap,though. See also http://www.monitorsensors.com/support/news/longest-63
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00124.html (8,970 bytes)

223. RE: [rsgb_lf_group] Re: LF: MF/630M LAST NIGHT (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 10 Feb 2018 14:11:39 +0100
In the other direction,from US to EU, conds were quite good,at least into grid JN68KJ79WJ. 2018-02-10 06:20 K4SV 0.475797 -24 -1 EM85wf 5 DL4RAJ/2 JN68kj 7496 46 2018-02-10 06:30 K4SV 0.475798 -22 -
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00213.html (12,495 bytes)

224. RE: VLF: 1.6 Hz from Kiruna? (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 10 Feb 2018 18:52:18 +0100
Hi David, ... Maybe you can disclose at least the the 3dB BW of this kind of antenna? 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00223.html (9,895 bytes)

225. RE: VLF: 1.6 Hz from Kiruna? (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 10 Feb 2018 20:42:06 +0100
Hi David, The 3 dB bandwidth is f0/Q and Q is defined as X/R where X is the reactance of the inductor and the capacitor at the resonant frequency. The lossless-Q of a small antenna is a useful academ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00227.html (10,929 bytes)

226. LF: RE: My best night ever MF (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 16 Feb 2018 11:02:46 +0100
Hi , I had also my best night ever in WSPR from 14th to 15th February 2018. 1 DL4RAJ JN68kj K5DNL EM15lj 8406 km 2 DL4RAJ JN68kj W4BCX EL98pd 7958 km 3 DL4RAJ JN68kj WA4SZE EM65 7791 km 4 DL4RAJ JN68
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-02/msg00344.html (10,012 bytes)

227. LF: RE: Re: Can an air cored LPF inductor have as high a "Q" as a toroidal wound one? (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 9 Mar 2018 17:43:43 +0100
Hi Alan, Chris is using #2 material mix,i.e. iron powder toroids,not ferrite. Iron powder is essentially not saturable because overheating will set the flux limit long before saturation occurs,see at
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00072.html (11,763 bytes)

228. LF: RE: Antenna splitter question (score: 1)
Author: "Clemens Paul" <>
Date: Wed, 14 Mar 2018 15:36:30 +0100
Hello Chris, if you use the common broadband design you surely can listen on LW and MW at the same time with a power splitter,e.g.like here https://ww2.minicircuits.com/app/AN10-001.pdf A diplexer is
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00097.html (8,744 bytes)

229. LF: RE: RE: Antenna splitter question (score: 1)
Author: "Clemens Paul" <>
Date: Wed, 14 Mar 2018 16:10:22 +0100
Here is another tutorial by minicircuits: https://ww2.minicircuits.com/app/AN10-006.pdf 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00099.html (10,145 bytes)

230. LF: RE: Re: RE: Antenna splitter question (score: 1)
Author: "Clemens Paul" <>
Date: Wed, 14 Mar 2018 18:26:35 +0100
Hi Alan, the loss depends on the design. For a wilkinson divider/combiner with about 30dB port isolation it's 3dB for each port, for a hybrid divider/combiner with 40dB port isolation it's 6dB. I agr
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00100.html (11,477 bytes)

231. LF: WSPR-2: Very good T/A conditions on MW (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 16 Mar 2018 15:31:43 +0100
Last night I managed for the first time to spot six different US stations: 2018-03-16 04:20 W4BCX 0.475672 -27 0 EL98pd 5 DL4RAJ JN68kj 7958 km 2018-03-16 03:06 WA4SZE 0.475652 -29 0 EM65 0.2 DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00129.html (10,678 bytes)

232. LF: DLF LW transmitter masts in Aholming demolished (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 30 Mar 2018 16:41:54 +0200
http://www.pnp.de/lokales/landkreis_deggendorf/osterhofen/2891417_Ueber-200-Meter-hohe-Sendemasten-im-Kreis-Deggendorf-gesprengt.htm l with video links on this page. 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00384.html (8,560 bytes)

233. LF: MW WSPR spots last night (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 31 Mar 2018 11:08:49 +0200
Hello MFers, new record in JN68KJ : Seven T/A stations in one night. AE2EA was a new one for me. AE2EA and K5DNL had no other spots in EU/UK last night. 2018-03-31 04:40 K5DNL 0.475710 -23 0 EM15lj 5
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-03/msg00401.html (8,621 bytes)

234. RE: LF: MW WSPR spots last night (score: 1)
Author: "Clemens Paul" <t>
Date: Sun, 1 Apr 2018 17:35:20 +0200
Thanks for that. :-) 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-04/msg00019.html (9,090 bytes)

235. LF: RE: W1VD amp help (score: 1)
Author: "Clemens Paul" <>
Date: Sun, 8 Apr 2018 08:38:06 +0200
Did you run your amp tests on a dummy load or on the antenna? 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-04/msg00104.html (8,441 bytes)

236. LF: Againl very good T/A conditions on MW (score: 1)
Author: "Clemens Paul" <>
Date: Thu, 12 Apr 2018 17:54:45 +0200
Hi all, last night I was able to spot even seven different US stations on MW,see below. Interestingly all total 23 T/A spots were made between 3:40 and 4:10 that's within 30 minutes of the whole nigh
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-04/msg00193.html (11,414 bytes)

237. LF: SAQ transmission (score: 1)
Author: "Clemens Paul" <>
Date: Tue, 1 May 2018 13:09:43 +0200
Hi Wolfgang, here reception was also very good with a SNR of 25-30dB in 150Hz BW. This time the setup was a Reuter Pocket SDR and an original PA0RDT Miniwhip (modified by Roelof for VLF) at ~3.5m agl
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-05/msg00004.html (10,892 bytes)

238. RE: LF: SAQ transmission (score: 1)
Author: "Clemens Paul" <>
Date: Tue, 1 May 2018 15:46:25 +0200
Hi Chris, I guess you have been on the english web site of Reuter. http://www.reuter-elektronik.com/html/pocket.html There you can also download the english manual. Reuter is using a very special and
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-05/msg00011.html (11,863 bytes)

239. LF: RE: SAQ transmission (score: 1)
Author: "Clemens Paul" <>
Date: Tue, 1 May 2018 19:25:08 +0200
Here is a link to my mp3 recording. https://www.dropbox.com/s/0htdm1i4hfcxiji/SAQ_2018_05_01.mp3?dl=0 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-05/msg00013.html (11,937 bytes)

240. RE: LF: RE: SAQ transmission (score: 1)
Author: "Clemens Paul" <>
Date: Wed, 2 May 2018 14:25:48 +0200
Hi Riccardo, Amazing what performance can be achieved with this old beast and clever software. Congrats! 73 Clemens DL4RAJ =link&utm_campaign=sig-email&utm_content=emailclient> Virenfrei. =link&utm_c
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-05/msg00021.html (15,779 bytes)


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