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201. LF: DJ2LF/P (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Wed, 24 Jul 2002 14:04:47 +0200
To All from PA0SE At 1000 UTC I measured the signal from DJ2LF/P at 144 microvolt/m. From their locator JN49ON and mine JO22GD follows a distance of 435km. Over perfect ground the EMRP would be 64 wa
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00080.html (8,270 bytes)

202. LF: Re: Calculating ERP from measured field strength (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 23 Jul 2002 16:13:34 +0200
To Reg, G4FGQ and the LF-group Reg, G4FGQ wrote: Yes, I am aware of that. But I am interested in the extent to which VLF predicting capability of program GrndWav3 is affected by skywaves. It would be
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00098.html (10,484 bytes)

203. LF: Re: Calculating ERP from measured field strength (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sun, 21 Jul 2002 10:04:51 +0200
To All from PA0SE Reg Edwards, G4FGQ, wrote: I have just checked the source code in program GrndWav3. It does make use of CCIR curves and data for refraction over the horizon although I have had to u
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00122.html (10,645 bytes)

204. LF: Calculating ERP from measured field strength (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 20 Jul 2002 13:08:39 +0200
To All from PA0SE Today at 0800 UTC I measured the field strength of Jim, M0BMU on 137.4kHz, at 11 microvolt/metre. The distance between M0BMU and PA0SE is 329km. Using the curves for ground wave pro
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00132.html (10,815 bytes)

205. Re: LF: Activity from DLF“s 360m mast (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 18 Jul 2002 11:17:29 +0200
Dear Walter and the LF-gang, Assuming the 360m mast has no top load my antenna simulation program gives a feedpoint impedance of Z = 11.9 - j149 ohm over perfect ground. The reactive part depends on
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00153.html (12,015 bytes)

206. Re: LF: Summer Bonus Offer ..... (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 09 Jul 2002 11:14:53 +0200
To Alan and All from PA0SE Thanks Alan for a very useful program. I downloaded it without any trouble and it immediately worked fine under Windows 98. 73, Dick, PA0SE At 00:21 9-7-02 +0100, you wrote
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00224.html (9,831 bytes)

207. LF: Luxemburg effect? No! (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sun, 07 Jul 2002 09:59:16 +0200
To All from PA0SE Last Saturday I reported that I suffered from strong BC QRM centered on DCF39. I ascribed that to the Luxemburg effect. But in the meantime I found out that this was not the cause o
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00232.html (8,111 bytes)

208. LF: Luxemburg effect? (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 06 Jul 2002 11:12:35 +0200
To All from PA0SE Already several days I suffer from terrible broadcast QRM on the LF-band. It sounds like Luxemburg effect centered on DC39. It is so bad that this morning I could hardly read M0BMU
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00238.html (8,612 bytes)

209. LF: Teletron LWF45 receiver (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 04 Jul 2002 10:49:33 +0200
To All from PA0SE Ruddy, ON4UX, has asked me to put the following message on the reflector. Having heard from me that I use a hybrid LF receiver type LWF45, made by the German firm Teletron in the si
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00244.html (8,017 bytes)

210. LF: Bandplan (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 01 Jul 2002 14:36:58 +0200
To All from PA0SE Many thanks to all who responded to my request (see below). I will use the suggestion by Geri, DK8KW, with a remark that it has not the status of an official bandplan but should be
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-07/msg00252.html (8,691 bytes)

211. LF: Website on antennas (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 06 Aug 2002 20:22:55 +0200
To All from PA0SE Via F6ETI and PA0EZ reached me the following URL of a useful website on antennas. http://www.ac6v.com/antprojects.htm 73, Dick, PA0SE
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00173.html (7,800 bytes)

212. LF: Cave Radio (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 03 Aug 2002 12:20:54 +0200
To All from PA0SE, I apologize for using the reflector for a subject that has nothing to do with LF. But I know there are subscribers to the list who are interested in cave radio and I don't know how
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00194.html (8,483 bytes)

213. LF: "Downward modulation" (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 01 Aug 2002 10:31:37 +0200
To All from PA0SE Apparently my remark that the carrier of Droitwich goes downwards during modulation has caused confusion. I certainly did not mean "downward modulation" as we remember it from our A
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-08/msg00211.html (9,051 bytes)

214. LF: Antenna simulation computer program (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 30 Sep 2002 14:56:27 +0200
To All from PA0SE, An interesting computer program for simulating antennas can be found at: www.qsl.net/wb6tpu/swindex.html. Search for "4nec.2" and download the two files concerned. It is free. When
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00005.html (8,065 bytes)

215. LF: Insulators (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 31 Oct 2002 10:57:08 +0100
To All from PA0SE Peter, G3LDO wrote: I use insulators kindly supplied by Dick, PA0SE. These are serious insulators some 150mm long (6 inches in old money) made of glazed ceramic. I still have a doze
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00008.html (9,559 bytes)

216. Re: LF: IEE Presentation (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 28 Oct 2002 22:32:40 +0100
Andy, Please send me a copy. Thanks! 73, Dick, PA0SE At 13:41 28-10-02 +0000, you wrote: My Poster Presentation "Amateur Use of Novel Signalling Methods at LF" shown at the IEE conference on "Getting
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00048.html (11,222 bytes)

217. Re: LF: Wandel Goltermann SPM12 Selective Level Meter (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 28 Oct 2002 21:49:28 +0100
At 20:03 28-10-02 +0000, you wrote: If anyone on the list is interested in an SLM at a reasonable price I've found the following Wandel Goltermann SPM12 Selective Level Meter. 200Hz to 6 Mhz 6 Off £7
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00050.html (10,167 bytes)

218. RE: LF: Spam via reflector (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sun, 27 Oct 2002 11:45:47 +0100
To All from PA0SE If removing spam from the reflector is easily done I would be in favour of it. But I don't like forcing the sysop into a major operation. And the delete key is always within easy re
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00096.html (12,157 bytes)

219. Re: LF: Re. 73kHz activity (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 24 Oct 2002 10:13:37 +0200
To Laurie and All, Just heard your CQ on 71.75kHz with the aerial system tuned to 136kHz. Readibility 4. Signal strength is a bit difficult to measure under these circumstances but by ear I would put
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00138.html (8,474 bytes)

220. LF: Re: Drooping top loading (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 22 Oct 2002 12:16:43 +0200
To All from PA0SE In order to find the effect of drooping top load wires upon the radiation resistance I modelled an umbrella antenna using K6STI's antenna simulation program Antenna Optimizer. The a
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00164.html (11,226 bytes)


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