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Total 193 documents matching your query.

1. LF: AD9832 0-6 MHz DDS VFO (score: 1)
Author: "Johan Bodin" <>
Date: Mon, 22 Feb 1999 08:58:48 +0100
Hi All, I have put a description of my AD9832 DDS VFO on my web site. It is a small VFO module, about 50x30 mm. Schematic diagram is in PDF format (Adobe Acrobat) PCB layout is in Postscript format.
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-02/msg00008.html (7,804 bytes)

2. LF: Mini DDS web page updated (score: 1)
Author: "Johan Bodin" <>
Date: Tue, 9 Mar 1999 12:01:04 +0100
Hello All, I have added pictures of my DDS VFO module to the page: http://home4.swipnet.se/~w-41522/minidds/minidds.html 73 de Johan, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00048.html (7,747 bytes)

3. LF: SV: SM/OH qso (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 10 Mar 1999 08:19:32 +0100
Congratulations Christer! Probably the first international two-way LF amateur QSO ever made from Sweden! (I made the first one-way when I first heard OH1TN some time ago ;-) Just worked OH1TN on 136k
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00062.html (8,011 bytes)

4. LF: LF band about to be released in SM (score: 1)
Author: "Johan Bodin" <>
Date: Sat, 13 Mar 1999 17:57:04 +0100
Hi All, The new swedish ham regulations, which includes the 135.7 - 137.8 kHz band, will come into effect the 1:st of April (no joke, honestly!). Unfortunately, the paper states a maximum OUTPUT powe
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00088.html (7,896 bytes)

5. LF: Re: LF - early April 1st question (score: 1)
Author: "Johan Bodin" <>
Date: Sat, 20 Mar 1999 20:38:18 +0100
Hi All It's easy to produce an E (electric) field and It's equally easy to produce an H (magnetic) field. However, it is quite difficult to "convince" these two separate fields to join and create a P
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00125.html (8,926 bytes)

6. LF: SV: Re: Re: LF - early April 1st question / QRU (score: 1)
Author: "Johan Bodin" <>
Date: Mon, 22 Mar 1999 09:44:58 +0100
Yes Roger, you are right and I agree. I guess the CFA was an attempt to produce a "ready made" flying far field already in the antenna structure. G3JKV was right too. Please let us stop this discussi
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00134.html (8,973 bytes)

7. LF: SV: RTTY signal around 137 (score: 1)
Author: "Johan Bodin" <>
Date: Thu, 25 Mar 1999 00:23:31 +0100
Hello The mysterious FSK signal on 137 kHz is quite strong here in Sweden too (wednesday 23.15 UTC), but it is much weaker than the Greek Marathon signal on lower band edge. 73, Johan SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00163.html (7,806 bytes)

8. LF: TDA2030 as LF PA? (score: 1)
Author: "Johan Bodin" <>
Date: Thu, 25 Mar 1999 09:57:29 +0100
Hello, I remember reading about a TDA2030 PA for 137 kHz but I cannot find the text now. I found a few TDA2030s in my junk box and decided to try them in a small linear PA for PSK31 experiments. I th
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00169.html (8,134 bytes)

9. SV: LF: 137 Carrier (score: 1)
Author: "Johan Bodin" <>
Date: Fri, 26 Mar 1999 16:32:27 +0100
Hello Rik and others. A selective voltmeter can be built using a gyrator. If you have "The LF Experimenters Source Book" (RSGB), take a look at the gyrator tuned VLF receiver on page 3.7. The gyrator
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00185.html (8,528 bytes)

10. LF: SV: LF Activity (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 7 Apr 1999 11:12:05 +0200
Hi Marzio and the group Later at 136.15 I made qso with OZ1KMR ; his report was 539 with deep qsb. First I to OZ on LF? I heard your QSO with OZ1KMR here in JO67MR. Your signal was difficult to copy
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-04/msg00033.html (8,052 bytes)

11. LF: First SM/SM QSO! (?) (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 7 Apr 1999 22:54:13 +0200
Hi All, I just had my very first two-way LF QSO. What a thrill! (my hands are still shaking...) I was experimenting with a rotatable shorted turn in my loading coil. I increased the supply voltage to
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-04/msg00036.html (8,696 bytes)

12. LF: SV: LF Fieldday (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 28 Apr 1999 10:20:28 +0200
Hello all, We are not fixed to 137.3 kHz, but this is a QRM free gap in our area. The outher silent range is around 136.3 kHz but I think there is lot QRM in the North-West region. I think it would b
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-04/msg00136.html (7,903 bytes)

13. LF: HCMOS converter (score: 1)
Author: "Johan Bodin" <>
Date: Tue, 18 May 1999 13:53:46 +0200
Hello all, I have uploaded a schematic diagram of my 74HC4053 up-converter to my web site. http://home4.swipnet.se/~w-41522/lfconv/lfconv.html I haven't made any measurements on it but it seems to wo
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-05/msg00046.html (7,761 bytes)

14. LF: VB: Spectrogram 5.0 (score: 1)
Author: "Johan Bodin" <>
Date: Mon, 14 Jun 1999 01:36:36 +0200
Hello dear Lowfers, Richard Horne sent me a note about his release of Spectrogram v5.0. I asked him about forwarding his message to this reflector and here is his answer: Yes, please forward my email
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-06/msg00081.html (9,484 bytes)

15. LF: Oops! (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 16 Jun 1999 11:18:49 +0200
The separate noise receiver should have a separate wideband antenna, of course. An active whip or similar. 73 de Johan, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-06/msg00087.html (7,506 bytes)

16. SV: LF: Antennas, bandwidth, etc (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 16 Jun 1999 11:13:52 +0200
Also note that it is ineffective to use a separate noise receiver to derive noise blanking drive, as it does not "reverse" the situation that once a noise spike has become a noise blob (due to band
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-06/msg00088.html (9,359 bytes)

17. LF: SV: More on Rr (score: 1)
Author: "Johan Bodin" <>
Date: Thu, 24 Jun 1999 23:28:56 +0200
Hello, Further to my note on Radiation Resistance formulas, the highly respected 160m expert ON4UN uses 1450 instead of "160 (or 60) multiplied by pi squared" in his excellent book Low Band DXing. Th
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-06/msg00145.html (8,835 bytes)

18. LF: LF antenna bridge (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 21 Jul 1999 12:38:53 +0200
Hello all, I have uploaded a description of a simple antenna impedance bridge to my web site. http://home4.swipnet.se/~w-41522/bridge/bridge.html 73 de Johan Bodin, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-07/msg00111.html (7,670 bytes)

19. LF: Pictures of LF ATU in Karlsborg (score: 1)
Author: "Johan Bodin" <>
Date: Wed, 21 Jul 1999 22:18:56 +0200
Finbar, please have a look at my QRP ATU: http://home4.swipnet.se/~w-41522/lfpics/lfpics.html Hihi... 73 de Johan, SM6LKM
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-07/msg00116.html (7,877 bytes)

20. SV: LF: Ground systems (score: 1)
Author: "Johan Bodin" <>
Date: Sun, 25 Jul 1999 22:09:35 +0200
From Johan, SM6LKM Connecting the mains earth to the RF earth INCREASED THE RF RESISTANCE OF THE ANTENNA. We re-checked several times, and also checked that the voltage across the capacitor was low (
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-07/msg00153.html (10,850 bytes)


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