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Total 611 documents matching your query.

261. LF: RE: Re: Helically Wound Antennas (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 28 Dec 2018 20:55:29 +0100
No formulas but the DOS program in question is there for download. http://www.g4gcp.co.uk/antenna/download.htm If it's a problem to run the DOS program the used formulas can be extracted from it. 73
/rsgb_lf_group-archives/html/rsgb_lf_group/2018-12/msg00537.html (9,197 bytes)

262. RE: LF: MF WSPR (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 4 Jan 2019 12:46:32 +0100
Here with Perseus SDR the 100Hz sidebands are decoded between -37dBc and -41dBc (below the shifted carrier) if the SNR exceeds +11dB. Maximum SNR was +27dB with Perseus RX (and +31 with the Reuter P
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00033.html (12,488 bytes)

263. RE: LF: MF WSPR (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 4 Jan 2019 17:25:47 +0100
Just checked DH5RAE,who is located about 64km from here. He reaches up to +25dB SNR,also without decodable sidebands since this season. Obviously he has improved the filtering of his PS because in t
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00036.html (14,827 bytes)

264. LF: RE: Re: a lot of ferrite (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 12 Jan 2019 15:17:45 +0100
Hi Dimitris, I've made a calculation based on your data with the mini ring-core calculator and it says = 1070 and AL = 937.5nH /N^2 So your first calculation seems to be right. 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00102.html (10,736 bytes)

265. RE: LF: RE: Re: a lot of ferrite (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 12 Jan 2019 21:23:07 +0100
Hi Dimitris, The cross section of the rods or equivalent toroid is 2cm x 10cm. If you take 10cm as height the ring is 2cm thick. Hence the OD/ID difference is indeed 2cm not 4cm... 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00122.html (13,968 bytes)

266. RE: LF: RE: Re: a lot of ferrite (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 12 Jan 2019 22:27:13 +0100
No,you are right. :-) Thanks! 73 Clemens DL4RAJ a4a68a1f850a9ab6f4627c1d493fd1/hose_sizing_parker_hose_products_divi>sion_tube_diameter_300px.jpg
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00135.html (11,729 bytes)

267. RE: LF: Low Pass Filtering (score: 1)
Author: "Clemens Paul" <>
Date: Mon, 14 Jan 2019 12:48:04 +0100
Hi Claudio, If you have the usual configuration TX->LPF->SWR_Meter->Antenna the indicated SWR will NOT be spoiled by returning harmonics because they are attenuated by the LPF and reflected into the
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00166.html (9,385 bytes)

268. LF: RE: OK0EMW_again (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 19 Jan 2019 11:57:54 +0100
Hi Lubos, strong signal here at 12:00 MEZ (11:00UTC) with S6. SNR in 200Hz BW >20dB. 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00266.html (9,084 bytes)

269. LF: RE: 472 INFO (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 19 Jan 2019 15:41:52 +0100
Hi Mal, congrats to your TX DX results. However,I haven't seen any RX WSPR DX spots from you in the data base since a long time. 73 Clemens DL4RAJ =link&utm_campaign=sig-email&utm_content=emailclient
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00273.html (9,004 bytes)

270. RE: LF: RE: OK0EMW_again (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 19 Jan 2019 20:06:04 +0100
Hi Lubos, Aah,good to know. :-) I noticed your callsign several times when checking the database for T/A spots but was not aware anymore that OK2BVG is YOU. Your loop seems to perform quite well. Whi
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00279.html (10,099 bytes)

271. LF: RE: DL4RAJ_OK2BVG_WSPR (score: 1)
Author: "Clemens Paul" <>
Date: Sun, 20 Jan 2019 16:24:39 +0100
Hi Lubos, thanks for the description of your improved TX and RX antenna. My antenna is a fullsize halfwave dipole at 8m height at the feeding point, ends go up to 10m /15m height. It is fed by 42m ba
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00300.html (17,441 bytes)

272. LF: RE: TXing WSPR/MF on an indoor loop (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 25 Jan 2019 18:07:01 +0100
Hi Stefan, so far I seem to be the only spotter. 73 Clemens DL4RAJ 2019-01-25 16:58 DK7FC 0.475683 -23 0 JN49ik 0.01 DL4RAJ JN68kj 326 109 2019-01-25 16:52 DK7FC 0.475683 -21 0 JN49ik 0.01 DL4RAJ JN6
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00389.html (14,483 bytes)

273. LF: RE: RE: TXing WSPR/MF on an indoor loop (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 25 Jan 2019 18:30:04 +0100
Correction! Forgot to delete my callsign in the database query. 73 Clemens DL4RAJ 2019-01-25 17:22 DK7FC 0.475682 -23 0 JN49ik 0.01 PA3ABK JO21it 386 315 1 2019-01-25 17:22 DK7FC 0.475680 -22 0 JN49
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00390.html (17,707 bytes)

274. RE: LF: Re: TXing WSPR/MF on an indoor loop (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 25 Jan 2019 22:11:02 +0100
Hi Stefan, it would be interesting if you could measure the upper and lower frequency where the antenna current drops by 3dB, Then the efficiency of the loop including the influence of its environmen
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00396.html (16,268 bytes)

275. RE: LF: Re: TXing WSPR/MF on an indoor loop (score: 1)
Author: "Clemens Paul" <>
Date: Sun, 27 Jan 2019 17:12:00 +0100
Hi Markus, I've done some simulations with EZNEC 6+ which can simulate also small loops with reasonable accuracy due to its built in double precision engine which can optionally been engaged. For fre
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00414.html (15,810 bytes)

276. RE: LF: TXing WSPR/MF on an indoor loop, part 2 (score: 1)
Author: "Clemens Paul" <>
Date: Thu, 31 Jan 2019 07:35:31 +0100
Hi Dimitris, reactive near field: lambda/ (2*pi) 73 Clemens DL4RAJ
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-01/msg00446.html (15,558 bytes)

277. LF: Very good conditions on MW last night (score: 1)
Author: "Clemens Paul" <>
Date: Sun, 10 Feb 2019 10:21:41 +0100
Hi all, last night I got exceptionally good decodes in WSPR. N1DAY,KC4SIT and AE2EA got no other spots in EU and only one station in UK (GM4OAS) spotted these. 73 Clemens DL4RAJ Timestamp Call MHz SN
/rsgb_lf_group-archives/html/rsgb_lf_group/2019-02/msg00081.html (13,135 bytes)

278. LF: Re: SSB Beacon (score: 1)
Author: "Clemens Paul" <>
Date: Thu, 24 Sep 2009 23:12:41 +0200
Hi Gus, good copy with 49 in southern Germany JN68kj . I've sent you a mp3 file. 73 Clemens DL4RAJ -- Original Message -- From: Gus To:
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-09/msg00012.html (11,175 bytes)

279. LF: Re: Re: wspr (score: 1)
Author: "Clemens Paul" <>
Date: Sun, 6 Sep 2009 00:09:50 +0200
Hi Jim,Gus and Gary, 2009-09-05 21:58 G4WGT 0.503910 -25 0 IO83qo 0.5 DL4RAJ JN68kj 1226 112 2009-09-05 21:58 M0BMU 0.503975 -11 0 IO91vr 2 DL4RAJ JN68kj 1003 107 2009-09-05 21:56 SM6BHZ 0.503950 -13
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-09/msg00019.html (11,546 bytes)

280. LF: 500kHz wspr beacon M0MBU (score: 1)
Author: "Clemens Paul" <>
Date: Fri, 18 Sep 2009 23:40:00 +0200
Hi Jim, 2009-09-18 21:30 M0BMU 0.503840 +16 0 IO91vr 2 DL4RAJ JN68kj 1003 107 2009-09-18 21:26 M0BMU 0.503844 +14 -1 IO91vr 2 DL4RAJ JN68kj 1003 107 2009-09-18 21:18 M0BMU 0.503840 +15 0 IO91vr 2 DL4
/rsgb_lf_group-archives/html/rsgb_lf_group/2009-09/msg00072.html (18,221 bytes)


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