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Total 193 documents matching your query.

161. LF: Re: Narrow CW filter using 32kHz clock crstals? (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 25 Sep 2002 21:59:05 +0200
Tracey, I think Andy G4JNT has been playing with 32kHz watch xtals in filter applications. 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00053.html (8,718 bytes)

162. Re: LF: Re: The Code (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 3 Sep 2002 09:05:00 +0200
Ray, ..--. Is that one of those Swedish letters, or did you mean to say ..--.. ? No, ..--. is '!'. 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00214.html (8,015 bytes)

163. LF: Re: The Code (score: 1)
Author: "... -- -.... .-.. -.- --" <[email protected]>
Date: Mon, 2 Sep 2002 23:52:24 +0200
.... .. -.- -- --..-- - .... .- - .-- .- ... .- -. .. -.-. . .--. -- . -- ..--. -.-. ..- .-.. --... ...-- -.. . ... -- -.... .-.. -.- --
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00218.html (7,945 bytes)

164. LF: Re: Re: Re: E-field antennas (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 1 Sep 2002 22:55:35 +0200
Dear All, So i'm planning to made an Amrad antenna, i have send a request at Crystalonics for high current FET. Has anyone tried a small power MOSFET as input stage in an active antenna? I am thinkin
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-09/msg00224.html (9,767 bytes)

165. Re: LF: sound cards...well amybe if..... (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 30 Oct 2002 10:57:05 +0100
Anyone willing to design an USB interface for Intersil HSP50016 DDC? Together with an AD9260 ADC it would make a nice little front end for an LF SDR. Better chips are probably available today but the
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-10/msg00020.html (9,398 bytes)

166. LF: Re: Calibrating LF Current Meters (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 15 Nov 2002 12:32:26 +0100
Hugh, How have other people done it ? Any ideas ? I built a 1A antenna current meter with a current transformer. For calibration, I put a 10 ohm resistor (actually 10 x 100 ohms 1W in parallel) in se
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00175.html (11,051 bytes)

167. LF: Re: RX Frame Aerial for 136kc/s - still experimenting..... (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 12 Nov 2002 16:30:21 +0100
Not sure if it is still a point to ground the center of the tuned loop. There is no hi-z amplifier on the tuned loop that can suffer from common mode hum but you still need a low impedance DC path t
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00235.html (9,671 bytes)

168. LF: Re: Re: To Ponder over the weekend (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 8 Nov 2002 13:36:55 +0100
My guess is the 10uF capacitor becomes 1uF and the voltage rises to 100V. That's my guess too, but... W [stored energy] = V^2*C / 2: With oil: V=10V, C=10u => W = 10*10*10u / 2 = 500 uJ Without oil:
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00323.html (10,670 bytes)

169. LF: OT: DFCW on HF (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 31 Dec 2002 16:15:19 +0100
Hi There is a DFCW beacon on 40 meters. Frequency: 7022.381 kHz (dot), 7022.383 kHz (dash). Element length: 10s Element spacing: 3.333s Character spacing: 10s Word spacing: 20s Power: 1mW into coax f
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00002.html (8,188 bytes)

170. LF: Re: jason etc (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 18 Dec 2002 22:03:53 +0100
Just think what could be achieved with 1200 watts, a 100 ft vertical antenna resonated on 136 khz and a similar antenna at the receiving end instead of small loops or 3 feet active type antennas. As
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00218.html (8,774 bytes)

171. LF: Re: M0BMU Jason Success! (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 18 Dec 2002 12:10:44 +0100
Congratulations to Jim and John and of course also to Alberto and Vittorio. Congrats to Stewart too (if John used his decoder :-) Well done! 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00232.html (10,499 bytes)

172. LF: Re: (Off Topic) Transmitting Equipment (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 11 Dec 2002 17:24:28 +0100
Could you please tell me if you know any off-the-shelf (or easy to use) amateur equipment that would be suitable for doing that (even if i still have to customize the equipement) ? Yaecomwood has wha
/rsgb_lf_group-archives/html/rsgb_lf_group/2002-12/msg00380.html (9,181 bytes)

173. Re: LF: Argo V1 build 132 (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 7 Jan 2003 18:03:35 +0100
Yes, we use the YMD format in Sweden, falling digit significance from left to right. We use this strange format for normal numbers too ;-) CU on 713 Hkz 73 Johan SM6LKM The Swedes? John Rabson G3PAI
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00245.html (11,224 bytes)

174. Re: LF: OT: DFCW on HF (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 2 Jan 2003 18:45:47 +0100
The DFCW beacon on 40m is now QRT but I am planning to try milliwatt DFCW or QRSS on 160m soon. 73 Johan SM6LKM Nothing received here Johan, sorry... but will keep trying. 73 Alberto I2PHD
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-01/msg00298.html (8,811 bytes)

175. Re: LF: Feb 19th./20th (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 21 Feb 2003 13:09:05 +0100
I also checked the 200 baud data from DCF39 some time ago and found that the packet format was surprisingly similar to the "M-BUS" format used for remote reading from water, heat and energy meters. S
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00065.html (8,824 bytes)

176. Re: LF: Re: Re: Frequency accuracy (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 19 Feb 2003 23:25:18 +0100
I'm transmitting at the moment and hope that is on 137773.4Hz It is. 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00091.html (9,390 bytes)

177. LF: Re: Fast rise of DCF39 (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 18 Feb 2003 23:57:41 +0100
Hi Dexter, a funny "coincidence": http://www.irf.se/mag/ 73 Johan SM6LKM Just saw a very fast rise in signal strength of DCF39. About 25 db in 20 minuets. Steve's plot shows this fast rise also.
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-02/msg00119.html (8,213 bytes)

178. LF: Re: The leT/A of the law (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 13 Mar 2003 17:52:33 +0100
a) It is difficult to send your callsign every 15 minutes when it takes that longer than that to send your callsign ! It is a matter of perspective. If you are repeating only your callsign, you are
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00264.html (8,322 bytes)

179. LF: Re: CT1DRP 5th March (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 6 Mar 2003 00:29:32 +0100
Brians signals very strong tonight but some strange effect See picture Hmm... Looks like X and Y cromosomes... ;-) 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-03/msg00403.html (9,039 bytes)

180. LF: Re: Amidon Cores (slightly diverging from topic) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 23 Apr 2003 16:37:43 +0200
Andy, look for Micrometals. I believe they are the company that actually produces the cores sold by Amidon. 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2003-04/msg00107.html (8,949 bytes)


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