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Total 193 documents matching your query.

41. LF: RE: Beacon Power control. (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 3 May 2000 21:52:27 +0200
Hello, Compensating an off-resonance antenna with increased TX power seems like a brute force method to me. Why not build a simple phase measuring thing that outputs a +/- voltage that is proportiona
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-05/msg00040.html (9,359 bytes)

42. SV: LF: PSK sidebands (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 15 Dec 2000 13:20:13 +0100
Hi All, Class C, D, and E amplifiers are not that hard to modulate. Rather than do anything so drastic as tinkering with PWM in the RF driver stages, apply PWM methods to the power supply for the fin
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00309.html (8,604 bytes)

43. LF: SV: RE: Re:amplifiers (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 8 Dec 2000 18:29:00 +0100
Andy and All The parasitic diode is no good in this configuration for catching the spikes from what I call the transient soak choke, I use separate clamp diodes up to the rails effectively 'crosing o
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00411.html (10,867 bytes)

44. LF: SV: CRUNCH method (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 8 Dec 2000 18:27:45 +0100
Hi Decimation to lower the sampling rate is straightforward if wanted, just by taking one sample out of every N. You'll need a decimation filter to keep aliases out if the original signal has spectra
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00412.html (8,078 bytes)

45. LF: SV: Re:amplifiers (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 7 Dec 2000 21:46:26 +0100
Hi Andy and All The catch diodes clamp over-voltage spikes extremally well, in fact I don't see any spikes at all on the breadboard design. Yes, the "totem-pole" configuration is sort of self-clampin
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00423.html (9,315 bytes)

46. LF: Warning! Kak worm! (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 1 Dec 2000 16:34:24 +0100
Hi all My computer warned about possibly dangerous content in the message LF:G4CNN QRSS from William Staples. I had a quick look into the raw message code and it seems to contain the "kak virus". Be
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-12/msg00514.html (7,288 bytes)

47. LF: SV: Propagation (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 31 Jan 2001 13:43:53 +0100
Hi All, Sometimes Radio Norway (1314? 630?) sounded almost as strong as the original modulation! Please forget what I wrote about Radio Norway heard as Luxembourg effect on 153 kHz. I was not aware t
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00026.html (7,989 bytes)

48. LF: SV: 3C85 Material: Obsolete? (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 31 Jan 2001 00:51:53 +0100
Hi, Also, does anyone know a suitable alternative to those magical 3C85 cores having a diameter of 25; 42; and 58 mm? At 136 kHz, the material 3F3 is better than 3C85 for power transformation (lower
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00040.html (8,209 bytes)

49. LF: Propagation (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 31 Jan 2001 00:22:19 +0100
Hi All, At my QTH, the Icelandic BC stations on 189 and 207 kHz have been much stronger than usual during the recent nights. I am using a K9AY antenna for receiving (cardioid pattern) and when I poin
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00042.html (8,475 bytes)

50. LF: SV: Twelve (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 25 Jan 2001 01:40:24 +0100
Hi, As you probably already know, all Swedes are born with eleven fingers. Anyway, we are trying hard to approach the metric system, we're approaching it inch by inch... Better be careful, if the len
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00228.html (7,637 bytes)

51. LF: SV: Re: Reality check... (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 25 Jan 2001 01:12:49 +0100
Well put Steve! In chorus with I2PHD I shout - AMEN! SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00229.html (7,517 bytes)

52. LF: SV: Hats and Brooms (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Mon, 15 Jan 2001 01:22:31 +0100
Swedes also promise to eat their hats under similar circumstances ;-) I will eat my hat if somebody will decode Jack's callsign out of it. Thats a nice saying. On these occasions, in Germany we eat a
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00567.html (7,932 bytes)

53. SV: LF: Re: Order Number: TEMGNBWH700867 (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 10 Jan 2001 11:23:15 +0100
Hi The ISO standard is Year, Month, Day, which shouldn't confuse either side, unless one is from Mars perhaps. Yes, this is the logical way to write a date - most significant digit first. I think tha
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00686.html (8,786 bytes)

54. LF: SV: Re: VE1ZZ "M" in Sweden (?) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jan 2001 22:36:23 +0100
Mike 'XDV and All Yes, it must have been VE1ZZ. I got even better copy on his 0100Z transmission. Regarding blurred dots: Yes, I am well aware that the BW was (at least theoretically) too narrow for
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00704.html (8,858 bytes)

55. LF: Correction (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jan 2001 02:14:37 +0100
I meant 136.502... 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00740.html (7,555 bytes)

56. LF: VE1ZZ "M" in Sweden (?) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 9 Jan 2001 01:52:44 +0100
Hi All, I think I saw VE1ZZ on 135.502. With a little imagination, "1ZZ" can be seen in the attached picture. The transmission ended, or disappeared into QSB, at 00.42 UTC. 73 de Johan SM6LKM TIFF im
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00742.html (8,129 bytes)

57. LF: SV: Freq stability, cheap source of (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 4 Jan 2001 17:57:32 +0100
Brooks Shera published an excellent article in QST on "disciplining" a frequency standard to the GPS 1 PPS signal. I have built a standard based on this design and it performs very well. Schematic,
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-01/msg00865.html (8,641 bytes)

58. LF: SV: ERP / LF - where next (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 21 Feb 2001 22:50:09 +0100
[snip...] Better still, an absorber rather than a reflector - instead of bombarding everyone's e-mails with junk, it could all be written to a CD-ROM, which could then be discarded by RSGB staff at r
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00106.html (8,129 bytes)

59. LF: Interesting reading... (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 18 Feb 2001 20:31:45 +0100
Hi all, http://members.aol.com/jnrstanley/mainpres.htm 73 Johan, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00233.html (7,568 bytes)

60. LF: SV: Re: GPS-Disciplined BPSK (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 14 Feb 2001 13:37:02 +0100
I remember having read that the Oncore has been discontinued by Motorola. I have been suggested the following GPS OEM unit as a valid (or better) alternative when the primary interest is the 1PPS pu
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00302.html (8,431 bytes)


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