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141. LF: DTCXO (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 01 Dec 2002 07:44:21 +0000
Jose, Thank you - the Temex note explains all! Obviously ICOM tried a DTCXO in the 706 Mk II, found it unsatisfactory, and reverted to a straight TCXO in the IIG. Alan, Try http://www.npl.co.uk/npl/c
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00568.html (8,165 bytes)

142. Re: LF: LF commercial stations (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 20 Jan 2003 10:13:57 +0000
At 00:27 18/01/03 +0100, EA1PX wrote: Hi Group: I copy transmissions on 132.930 and 133.230 kHz. Can anyone to confirm me if they are of the Datatrak System and where are the TX located? 73 de José,
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00064.html (8,729 bytes)

143. LF: Books (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 12 Jan 2003 17:47:42 +0000
Sorry to disappoint a lot of people who rang and emailed about the books; both gone I'm afraid. However, since there seems to be a demand I will try to find some more. Watch this space! Let me try a
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00163.html (9,328 bytes)

144. LF: Books (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 12 Jan 2003 12:25:20 +0000
Have a spare copy of Termans' 1943 "Radio Engineers' Handbook" if anyone wants it. Also Vol II, 1938 ed. "Admiralty Handbook of Wireless Telegraphy" - the one with all the gen on loops and LF antenna
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00178.html (8,216 bytes)

145. LF: Noise (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Thu, 09 Jan 2003 09:44:46 +0000
Re the 520/1010 discussion. Wilsons' main objection to the 520 appears to be that it suffers from a great deal of local noise pickup, which actually would be expected from ANY vertically-polarised E-
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00222.html (10,008 bytes)

146. LF: Distance calculator (off topic) (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sat, 04 Jan 2003 18:08:25 +0000
At 07:32 04/01/03 G0MRF wrote: Hello Group. Happy New Year. Does anyone know of, or have, any windows software that can calculate distances based on the UK National Grid Reference system? (e.g. TQ147
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00286.html (10,144 bytes)

147. LF: Admiralty Handbook (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Wed, 19 Feb 2003 08:46:24 +0000
Anybody wanting the "Admiralty Handbook of Wireless Telegraphy" 1938, Vols 1 or 2 contact Gordon Bussey 0208 660 2240. He has three copies. Also Langford-Smiths 1940 "Radio Designers Handbook" Walter
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00112.html (8,033 bytes)

148. LF: Admiralty Handbook (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 17 Feb 2003 10:32:35 +0000
Anybody wanting the "Admiralty Handbook of Wireless Telegraphy" 1938, Vols 1 or 2 contact Gordon Bussey 0208 660 2240. He has three copies. Also Langford-Smiths 1940 "Radio Designers Handbook" Walter
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00137.html (8,021 bytes)

149. Re: LF: LOADINGCOILS (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 10 Feb 2003 18:58:57 +0000
thanks for all the hints and advices concerning calculation of loadingcoils. A great help. Now its up to me.... 73 de Peter, dj9dw Peter, The man who designed the Decca coils tells me he did it by r
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00199.html (8,530 bytes)

150. Re: LF: xtals (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 09 Feb 2003 08:19:52 +0000
At 20:12 08/02/03 +0000, G3KEV wrote: I have a Decca Marine RX, comprising 3 units and a Display unit all tube construciton. Two of the units have lots of high stab xtals. These xtals are glass encap
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00221.html (8,875 bytes)

151. LF: Positions (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 16 Mar 2003 17:39:39 +0000
Alex I asked for LAT/LON or GRID REF and not LOC. I already have the Loc but my prog needs lat/long or grid ref to calculate the distance. G3KEV All the info you need to calculate lat/lon from LOC y
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00194.html (10,597 bytes)

152. LF: Rugby Radio (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Wed, 09 Apr 2003 19:19:09 +0100
There is an excellent article detailing the history and giving a technical description of GBR Rugby in the current issue of "Medium Wave News". It's a little old (written in 1974) but still interesti
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00224.html (8,473 bytes)

153. Re: LF: TX coil screening (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sun, 06 Apr 2003 09:42:01 +0100
Hi Uwe, The clearance between the Decca coils and the screening was at least 2.5x coil dia and the calculated loss assuming perfect continuity between copper sheets was less than 0.1 dB. The trick is
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00239.html (9,438 bytes)

154. LF: TX coil screening (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Fri, 04 Apr 2003 23:12:26 +0100
Only just saw the postings re Decca coil screening. My Decca pal tells me he lined Decca Tx coil huts with copper (thin - 20g) to maintain constant dielectric environment and constant phase. The whol
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00247.html (9,816 bytes)

155. LF: TV co-ax (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Fri, 9 May 2003 12:30:30 +0100
Alan, FWIW, I vaguely remember from somewhere that 75 ohms was chosen for TV because it uses less copper than 50 ohms so was cheaper. Walter G3JKV.
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-05/msg00130.html (7,854 bytes)

156. LF: Getting wires over trees (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Fri, 27 Jun 2003 10:31:38 +0100
Mal, Forget the bow and arrow; get yourself a high-power crossbow. I have a 200-lb draw one that will put monofilament 50lb fishing line over 100 ft trees 150ft away and land 300ft beyond it. It is a
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-06/msg00063.html (8,735 bytes)

157. LF: Re: Rugby Radio CD (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Sat, 21 Jun 2003 07:12:25 +0100
I think we should thank Alan for his efforts copying the Rugby CD. As he says, it is a very full disc and he must have spent a considerable time making those copies. Walter G3JKV. -- Checked by AVG a
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-06/msg00108.html (8,152 bytes)

158. LF: Re: Decca rx. (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 14 Jul 2003 21:42:10 +0100
OK Mal, many thanks for your kind offer of the Mk 12. Please contact David Jones at the flg to arrange shipping, etc: [email protected] I will let him know he's struck lucky. Walter G3JKV. -- Check
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-07/msg00059.html (8,243 bytes)

159. LF: Decca rx. (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 14 Jul 2003 18:27:25 +0100
I've had a request from a Canadian historical group who run an old WW2 destroyer as a museum whether I can find them a Decca Navigator Mk 5 or Mk 12. Nothing later since she was taken out of commissi
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-07/msg00069.html (8,088 bytes)

160. LF: xyl (score: 1)
Author: "Walter Blanchard" <[email protected]>
Date: Mon, 14 Jul 2003 18:09:38 +0100
My wife took great exception to being called an "ex-young lady" when I married her 45 years ago. She made a very funny speech to the Crawley ARC annual dinner about it and as a result they resolved o
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-07/msg00070.html (8,550 bytes)


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