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21. LF: Listening report 24 Nov 1999 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Thu, 25 Nov 1999 10:50:39 +0200
LF observations 24 Nov 1999 (136..137 kHz) by OH2LX (qth: Jokela, South Finland, KP20LN, (60N34 024E58) (R&S ESH2/-- 10m coax--/1:10/--15m wire--): 1627z 136.5 MM0ALM clg -15 dB(uV)->-122 dBmW 1637z
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00209.html (9,590 bytes)

22. LF: Listening report 25 Nov 1999 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Fri, 26 Nov 1999 15:45:02 +0200
LF observations 25 Nov 1999 (136..137 kHz) by OH2LX (qth: Jokela, South Finland, KP20LN, (60N34 024E58) (R&S ESH2/-- 10m coax--/1:10/--15m wire--): 2015z 136.5 OH3LYG wkg +4 dB(uV) -103 dBmW OZ5N -17
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00217.html (9,286 bytes)

23. Re: LF: Below 9 kHz (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Mon, 27 Dec 1999 10:24:24 +0200
Hello LF folks, EISCAT, including Sodankyla Observatory people and Oulu University have been experimenting on frequencies below 10 kHz since sometime in 1960-1970's but their main interest have been
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-12/msg00138.html (10,947 bytes)

24. LF: Listening report 24 Nov 1999 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Mon, 10 Jan 2000 10:30:46 +0200
LF observations 9 JAN 2000 (136..137 kHz) by OH2LX (qth: Jokela, South Finland, KP20LN, (60N34 024E58) (AR7030Plus/-- 10m coax--/1:10/--15m wire--): 2105z 136.5 G3YXM clg CQ (319) 2112z 136.5 IK5ZPV
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00081.html (10,898 bytes)

25. Re: LF: Collins 300Hz filters for AOR 7030 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Sat, 15 Jan 2000 19:02:20 +0200
Hi all, Just a little correction. R-C price is US$91.60 including carriage etc. My local bank charged $30 for a check... 73 de Vaino, OH2LX At 13:14 15.1.2000 -0000, you wrote: Hi All, Vaino and I ha
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00144.html (9,940 bytes)

26. LF: Signals strengths in OH (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Wed, 19 Jan 2000 18:42:03 +0200
Fellows, Now that G3KEV mentioned it (see below) there must be some secret in latitudinal location in addition to equipment available, power, antenna etc. I listen to 136 kHz day after day and leavin
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00228.html (9,860 bytes)

27. LF: Decca signal strength in OH2 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Thu, 20 Jan 2000 11:26:59 +0200
Now that all Scandinavian Decca's are qrt, I have test measured (GREEN frequency) levels of UK Decca's : -- Day -- 17 Jan 19 Jan 19 Jan 20 Jan Time,UTC -- 0520- 1655- 2135- 0515- -- 127.8 (6C), 1435,
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00242.html (9,785 bytes)

28. LF: Decca signal strength in OH2 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Tue, 25 Jan 2000 17:40:03 +0200
PLEASE, delete my earlier message of 25 Jan 2000 1330 UTC. Due to "editorial mistake" many FIGURES WERE WRONG I apologize... Now that all Scandinavian Decca's are qrt, I have test measured (GREEN fre
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00299.html (10,088 bytes)

29. LF: Decca signal strength in OH2 (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Fri, 28 Jan 2000 18:29:30 +0200
A Study of Nighttime LF Signal Strength variations During next two months it will be possible to measure the signal strength of 7 existing UK Decca chains. My aim is to measure them daily 21-22 UTC,
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00329.html (10,369 bytes)

30. LF: Signal Strength Measurements by OH2LX (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Sun, 30 Jan 2000 10:50:26 +0200
Measurements of UK Decca's and some other stations : -- Day -- 25Jan 26Jan 27Jan 28Jan 29Jan Time,UTC -- 2200- 2135- 2145- 2150- 2200 -- 127.8 (6C), 1435, 280, -107 -106 -110 -109 -109 -- 126.7 (2A),
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-01/msg00346.html (10,416 bytes)

31. Re: LF: Change of ground resistance due to frozen ground (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Wed, 02 Feb 2000 09:37:13 +0200
In Finland we have some experience with frost. Information about its effects on ground wave propagation is not very well established. Same with TV & FM space wave (I am not talking about frost on ant
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00026.html (13,361 bytes)

32. LF: Signal Strength Measurements by OH2LX (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Fri, 04 Feb 2000 07:50:24 +0200
Measurements of UK Decca's and some other stations : -- Day -- 30Jan 31Jan 01Feb 02Feb 03Feb Time, UTC -- 2205- 2145- 2205- 2200- 2130- -- kHz Ch *d,km AZI* *Indicated ESH2 input, dBmW* -- 127.8 (6C)
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00045.html (11,193 bytes)

33. LF: 7S6SAJ - Special Report (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Sun, 06 Feb 2000 08:50:37 +0200
7S6SAJ Special - 5 February 2000 (All times: UTC) -- 1959 136.3 7S6SAJ calls CQ +5 -102 2008 OH3LYG works 7S6 +5 -102 2012 SM4DHN works 7S6 -18 2018 OH1TN works 7S6 -3 -110 2032 DK9DX works 7S6 (<-23
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00070.html (9,412 bytes)

34. LF: LF Propagation thoughts (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Sun, 06 Feb 2000 17:03:20 +0200
Some thoughts on 136 kHz Ionospheric propagation Sorry for this not being in phase with T/A ideas. I have found exploring LF propagation refreshing - after a 20-25 year sleepy period. In fact some of
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00076.html (10,429 bytes)

35. LF: Signal Strength Measurements by OH2LX (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Wed, 09 Feb 2000 10:13:41 +0200
Measurements of UK Decca's and some other stations : -- Day -- 04Feb 05Feb 06Feb 07Feb 08Feb Time, UTC -- 2150- 2205- 2130- 2200- 2135- -- kHz Ch *d,km AZI* *Indicated ESH2 input, dBmW* -- 127.8 (6C)
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00103.html (11,448 bytes)

36. LF: LF Fs vs effective ground conductivity vs EMRP (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Wed, 09 Feb 2000 13:34:33 +0200
Hi all, I found from my archives an old report about flight measurements of Swedish Decca's dated in May 1970. A DC-3 was used for measurements. *MARKENS KONDUKTIVITET BESTÄMD MED HJÄLP AV FÄLTSTYRKE
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00105.html (8,838 bytes)

37. LF: Signal Strength Measurements by OH2LX (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Tue, 15 Feb 2000 10:34:22 +0200
Measurements of UK Decca's and some other stations : -- Day -- 09Feb 10Feb 12Feb 13Feb 14Feb Time, UTC -- 2240- 2140- 2140- 2145- 2200- -- kHz Ch *d,km AZI* *Indicated ESH2 input, dBmW* -- 127.8 (6C)
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00154.html (11,389 bytes)

38. Re: LF: How bad my receiver was.... (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Tue, 15 Feb 2000 17:02:09 +0200
About short or long period signal level recordings Any stable, preferably calibrated, selective rf level meter should be useful for short period signal strength variation checks. Or even for long tim
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00157.html (11,821 bytes)

39. Re: LF: Re SIDs and Transatlantic (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Wed, 16 Feb 2000 20:02:02 +0200
Hi LF folks, SID effects are mainly caused by solar EM radiation and D region effects by hard X-rays. So they travel with about the same speed than visible light does. SID's are labelled according to
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00165.html (11,121 bytes)

40. LF: Signal Strength Measurements by OH2LX (score: 1)
Author: Väinö Lehtoranta <[email protected]>
Date: Sun, 20 Feb 2000 10:12:32 +0200
Measurements of UK Decca's and some other stations : -- Day -- 15Feb 16Feb 17Feb 18Feb 19Feb Tue Wed Thu Fri Sat Time, UTC -- 2150- 2220- 2355- 2150- 2205- -- kHz Ch *d,km AZI* *Indicated ESH2 input,
/rsgb_lf_group-archives/html/rsgb_lf_group/2000-02/msg00193.html (11,755 bytes)

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