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Total 193 documents matching your query.

61. SV: LF: GPS-Disciplined BPSK (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 13 Feb 2001 22:57:55 +0100
Hi I checked with Garmin on this and they're standing by their 1 microsecond spec. They suggest using the GPS25-LVS (which apparently has a mode where you can specify that the location is fixed and l
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00314.html (10,527 bytes)

62. LF: VA3LK's dot length? (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Mon, 12 Feb 2001 23:59:47 +0100
Hi dear All, I am seeing a faint broken line on 137.789.5 +/- 0.1Hz right now (using Argo set for 60s dots). What dot length is Larry using? 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00330.html (7,690 bytes)

63. LF: SV: TR QSO TIME (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 2 Feb 2001 18:10:39 +0100
Hi Mal, Not sure about smoke signals but I do not think so, they were probably faster than slow morse. Haha! Well, I think you are wrong. G3YXM's recent experiments with a parallel RF/smoke transmitt
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00602.html (7,930 bytes)

64. LF: Spectrogram 6.0.1 (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 1 Feb 2001 01:19:38 +0100
Hi All, FYI: Richard Horne has released Spectrogram 6.0.1. Now $25 shareware :-( http://www.monumental.com/rshorne/gram.html 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-02/msg00640.html (7,192 bytes)

65. LF: SV: Transatlantic-mystery (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 18 Mar 2001 13:26:40 +0100
Hi Uwe first line: lf-meteorites ? Yes, probably, or perhaps parts of MIR, hihi... To me, it looks like a QRSS station sending "DDK"... with severe QRH/QRI. 73 Johan Bodin SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-03/msg00192.html (7,841 bytes)

66. LF: Off topic - looking for star map program (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sat, 26 May 2001 18:28:36 +0200
Hello A few months ago, I saw a download link for a homemade star map program for PC. I am almost sure that it was on a G amateur's homepage but I don't remember which one... I believe he is an LF en
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00064.html (7,829 bytes)

67. LF: SV: Re Data. (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 23 May 2001 23:07:21 +0200
Hi Laurie I don't know about the BDY62 but I have two marine NDB transmitter "wrecks" containing dozens of Delco DTS-423. These transmitters have been operating on 308 kHz here in SM in days gone by.
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00088.html (7,936 bytes)

68. LF: On-topic (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Thu, 3 May 2001 22:25:10 +0200
Hi All A long thin wire tied to a cluster of helium filled Durex units will dramatically increase the effective height of the transmitting antenna! 73 Johan, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-05/msg00295.html (7,674 bytes)

69. LF: SV: Magnetometer uses (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 19 Jun 2001 00:15:18 +0300
Hi Andy, perhaps someone at http://www.aurorawatch.york.ac.uk/ has the answer. 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-06/msg00133.html (7,600 bytes)

70. SV: LF: QSOs and snails (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sat, 2 Jun 2001 19:52:12 +0300
Tom, John, I thought escargot were usually stuffed with garlic and baked in a medium oven! I suppose you mean mediumwave oven? Yes, why not... They can be baked in microwave ovens and now when experi
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-06/msg00298.html (8,341 bytes)

71. LF: SV: LF Receivers (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Tue, 31 Jul 2001 23:20:41 +0300
Hi Andy Your new RX design is interesting! Is the BFO phase locked to "an exact integer kHz"? If so, the DDS LO will be the only source of "odd steps". Clocked at 10MHz, it will produce an LO signal
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-07/msg00001.html (8,246 bytes)

72. SV: LF: Harmonic sampling (Was: Decimation) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sun, 5 Aug 2001 22:46:14 +0300
Paul, An undersampling system needs some kind of sample & hold circuit. IIRC from digital audio, the aperture time should be less than T/10 (T=sampling period) in order to keep the high frequency rol
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-08/msg00170.html (12,333 bytes)

73. LF: Harmonic sampling (Was: Decimation) (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Sat, 4 Aug 2001 00:17:11 +0300
Paul, your thoughts about an undersampling LF receiver are very interesting! The "tunable crystal filter" solves the problem with multiple alias passbands associated with undersampling but there are
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-08/msg00184.html (10,239 bytes)

74. LF: SV: LF Receivers (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 1 Aug 2001 11:31:21 +0300
Andy, But isn't the accuracy and stability of a cheap colour subcarrier xtal, pulled more than 100ppm from its normal operating point, going to swamp the values you derive from the 'nice' numbers gen
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-08/msg00201.html (8,266 bytes)

75. LF: SV: Re: SV: LF Receivers (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Wed, 1 Aug 2001 10:59:14 +0300
John, 3579.545 kHz color burst crystal You are right! Thanks for the tip. I don't know if it is "easily pullable" though... I remember trying a "32 pF parallel 3579 rock" in series resonant mode but
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-08/msg00202.html (8,536 bytes)

76. LF: SV: LF Loading coil designs (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Mon, 22 Oct 2001 20:13:13 +0200
Martin, you may wish to try the programs TANT136 and SOLNOID2 available at http://www.btinternet.com/~g4fgq.regp/ 73 Johan SM6LKM Any thoughts on loading coil design to drive it from the output of a
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-10/msg00120.html (7,944 bytes)

77. LF: SV: new (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Mon, 15 Oct 2001 09:13:30 +0200
Hi Mal, I doubt that SM3UWI is active on LF. You probably had a QSO with Wolfgang SM3UWS (who is experimenting a lot on 136). Wolfgang's email address: [email protected] 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-10/msg00222.html (7,560 bytes)

78. Re: LF: [off band] 80m QRSS QRPpp beacon on the air (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 30 Nov 2001 21:22:42 +0100
SM6LKM MICRO That is correct! Thanks for the report. Wolfgang, DL4YHF, Du bist auch gehört worden. Is Wolfgang also transmitting QRSS on HF? 73 Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-11/msg00001.html (8,951 bytes)

79. LF: [off band] 80m QRSS QRPpp beacon on the air (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Fri, 30 Nov 2001 01:47:52 +0100
Hi dear All The QRPpp beacon is now on the air again with improved stability. Frequency is derived from the OCXO in my GPS disciplined freq. standard but the GPS antenna is down at the moment so the
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-11/msg00015.html (8,635 bytes)

80. LF: Re: RE: 80m QRSS QRPppp QRT (score: 1)
Author: "Johan Bodin" <[email protected]>
Date: Mon, 26 Nov 2001 20:32:41 +0100
Andy, What was the frequency ? Somewhere in the vicinity of the 80 meter band, probably.... It is drifting a few Hz around 3593.55 kHz. A mixer/BPF/PA is on the workbench. It will eventually become G
/rsgb_lf_group-archives/html/rsgb_lf_group/2001-11/msg00074.html (8,966 bytes)


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