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Total 325 documents matching your query.

241. Re: LF: Measuring earth resistance (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 14 Dec 2002 09:46:42 +0100
when resistance I guess you mean "earth conductivity", which is the reverse of "earth resistance" and moves in the opposite way between summer and winter! 73 Costas SV1XV
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00334.html (10,160 bytes)

242. LF: Measuring earth resistance (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 13 Dec 2002 13:39:43 +0100
To All from PA0SE There were some requests for info on the way I measured the earth resistance of my aerial system. In 1988 I made an impedance bridge with a noise source. In the first version of thi
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00357.html (12,534 bytes)

243. Re: LF: Antenna tests (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Thu, 12 Dec 2002 17:08:16 +0100
To All from PA0SE Markus wrote: Though I normaly really dislike the cold weather (as does my 17-year-old Golf Diesel which is supposed to take me to work), the one good thing about frost is the impro
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00377.html (9,418 bytes)

244. LF: SM6BHZ (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 07 Dec 2002 13:00:48 +0100
To All from PA0SE At 1126 UTC worked a new station: SM6BHZ. Name Gus, loc. JO57WQ. When we started I gave him RST 569 and received RST 439. Later his signal became weaker and a bit difficult to copy
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00467.html (7,585 bytes)

245. Re: LF: Re: Series loading coil (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sun, 01 Dec 2002 13:52:33 +0100
Sri I made a mistake in the equation for L1; It should be L1 = L2 + L3 + 2k * square root L2 * L3 To M0WYE and All from PA0SE Hugh, M0WYE wrote: I've wound myself a coil on a bucket, the inductance i
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00564.html (13,090 bytes)

246. Re: LF: Re: Series loading coil (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sun, 01 Dec 2002 13:18:00 +0100
To M0WYE and All from PA0SE Hugh, M0WYE wrote: I've wound myself a coil on a bucket, the inductance is a bit low at the moment, the whole thing resonates no lower than 250kHz at present - so I've som
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00565.html (13,312 bytes)

247. LF: Magazine articles on LF (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 31 Jan 2003 16:18:38 +0100
To All from PA0SE Practical Wireless of January 2003 contains the following article: "Rugby Radio - Serving Britain For 75 Years", by Stan Brown, G4LU. In RadCom of February 2003 you will find: "A Cl
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00005.html (7,841 bytes)

248. LF: Off topic: buying used books via Internet (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 11 Jan 2003 12:38:44 +0100
Correction: The URL should be http://www.alibris.com/). To All from PA0SE A useful internet site for used books is ALIBRIS (http://alibris.com/). I looked for a book on radar by Buderi: The Invention
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00194.html (9,142 bytes)

249. LF: Off topic: buying used books via Internet (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 11 Jan 2003 12:30:29 +0100
To All from PA0SE A useful internet site for used books is ALIBRIS (http://alibris.com/). I looked for a book on radar by Buderi: The Invention that changed the world. The list price at the Internet
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00195.html (8,982 bytes)

250. Re: LF: O/C chasing at LF (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 28 Feb 2003 14:29:53 +0100
Well done, Alan! This is what I like: clever use of equipment that happens to be available. 73, Dick, PA0SE At 01:07 28-2-03 +0000, you wrote: Hi all, I thought this little episode might prove intere
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00001.html (10,140 bytes)

251. Re: LF: Coil Calculation (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 10 Feb 2003 13:46:18 +0100
Thanks Jim! A very nice and useful program. 73. Dick, PA0SE At 15:57 6-2-03 +0000, you wrote: Dear Peter, LF group, I have used a simple DOS program coil.exe (runs OK in windows DOS box) which can be
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00204.html (9,919 bytes)

252. Re: LF: POUR LES FRANCOPHONES (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 28 Mar 2003 16:19:10 +0100
Perhaps Ray used the "Royal We". 73, Dick, PA0SE Sorry we don't speak French. Hello Ray, shouldn't that be "Sorry I don't speak French" ? A large number of "we" is not native English and I am sure th
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00043.html (10,139 bytes)

253. Re: LF: POUR LES FRANCOPHONES (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 28 Mar 2003 15:10:18 +0100
Perhaps he used the "Royal We" 73, Dick, PA0SE At 10:20 27-3-03 +0100, you wrote: Sorry we don't speak French. Hello Ray, shouldn't that be "Sorry I don't speak French" ? A large number of "we" is no
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00044.html (10,166 bytes)

254. Re: LF: 73kHz (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 03 Mar 2003 15:40:35 +0100
Dear Mike, All times are UTC I presume. 73, Dick, PA0SE At 14:17 3-3-03 +0000, you wrote: I am now set up on 73kHz and have 1A into the antenna. I will beacon this evening 1800-1900 in case anyone wa
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00443.html (9,497 bytes)

255. Re: LF: 73khz First Tuesday activity (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Mon, 03 Mar 2003 13:24:16 +0100
To All from PA0SE, After a CQ please listen to calls on 137kHz as well for a possible crossband QSO. 73, Dick, PA0SE At 22:47 2-3-03 +0000, you wrote: Dear all. As Alan mentioned in his mail about pr
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00448.html (9,202 bytes)

256. Re: LF: Re: LF tuning meter (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Wed, 30 Apr 2003 14:55:23 +0200
Dear Jim, Please send me a copy of your paper. Thanks! 73, Dick, PA0SE At 12:44 30-4-03 +0100, you wrote: Dear LF Group, Thanks for the feedback on the tuning meter. Thanks to G3NYK who has pointed o
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00004.html (9,915 bytes)

257. Re: LF: The Mystery - "Eve" (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 26 Apr 2003 20:08:21 +0200
Dear Ian, After I obtained a battery fed selective level meter (W & G SPM-12) I prefer to use that for FS measurements together with a single turn untuned loop of 1 x 1 square metre because there is
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00055.html (9,337 bytes)

258. Re: LF: The Mystery of the Missing Amps.. (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 15 Apr 2003 09:46:22 +0200
Dear Ian, I cannot offer you an explanation. But to find out in which conductors earth current flows I use a home made clamp-on type of ammeter. It was described in Pat Hawker's Technical Topics in R
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00190.html (12,516 bytes)

259. Re: LF: Loading coils and Decca 5501 screening (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Sat, 05 Apr 2003 09:50:51 +0200
At 17:32 4-4-03 +0100, you wrote: Dear Brian, LF Group, At 04:46 01/04/2003 +0100, you wrote: Only slightly off topic, but about two years ago now someone described completing the screening on a Decc
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00246.html (10,437 bytes)

260. Re: LF: Top loading - to short or not to short? (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Tue, 27 May 2003 09:38:54 +0200
To Laurence and All, Laurence, KL1X wrote: In looking at my LF Inverted L, and specifically the 3 wire top loading wires - I've a couple of questions... 1. I see a recommendation that the vertical pa
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-05/msg00028.html (10,706 bytes)


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