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1. Re: LF: DBF39 off-air (score: 1)
Author: Väinö Lehtoranta <>
Date: Fri, 09 Apr 1999 19:15:49 +0300
Hello folks, I'm a newcomer to this mailing list, Incidentally measured frequencies of DCF39/49 yesterday. DCF77 (77.5) and DCF39 (138.83/139.17) are continuously Fs recorded here at our Monitoring S
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-04/msg00049.html (10,498 bytes)

2. Re: AW: LF: DBF39 off-air (score: 1)
Author: Väinö Lehtoranta <>
Date: Mon, 12 Apr 1999 11:08:32 +0300
Mille grazie caro Gamal per informazione! That is very very useful for me as I intend to analyze the field strength measuring data produced at the Jokela Measuring station. I'm retired propagation re
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-04/msg00059.html (14,976 bytes)

3. Re: LF: Multiple Tuned Vertical (score: 1)
Author: Väinö Lehtoranta <>
Date: Sat, 28 Aug 1999 14:18:30 +0300
The German Navy VLF antenna at Rhauderfehn (Ramsloh) 23.4 kHz is multiple tuned. It comprises eight 325.5 metre umbrella top loaded antennas. Each antenna is separately fed, and the 8 elements of the
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-08/msg00171.html (10,797 bytes)

4. Re: LF: LF-antennas with top load (score: 1)
Author: Väinö Lehtoranta <>
Date: Sun, 19 Sep 1999 09:56:55 +0300
LF Friends, Could anyone test calculate the antenna type with which we have done a lot of field work and measurements of all kind? Namely, 14 m tall Locator/NDB air navigation antenna operating on ai
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-09/msg00083.html (8,976 bytes)

5. Re: LF: Rising activity in SM (score: 1)
Author: Väinö Lehtoranta <>
Date: Tue, 28 Sep 1999 16:25:57 +0300
Hello LF folks, Have been testing my new AR-7030 Plus receiver and after purchasing an 8 Ah Tudor battery some of the hum problems were cleared. With a 500 Hz Collins filter - which is absolutely nec
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-09/msg00114.html (10,248 bytes)

6. Re: LF: re Vaino's rx findings and my thoughts (score: 1)
Author: Väinö Lehtoranta <>
Date: Wed, 29 Sep 1999 12:10:29 +0300
Dear friends, Your comments, especially that of Alan, G3NYK, were much appreciated. Having been a professional monitor for last 40 years this AR-7030 Plus was my first investment for 'own' receiver.
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-09/msg00119.html (10,061 bytes)

7. Re: LF: 136kHz receivers (score: 1)
Author: Väinö Lehtoranta <>
Date: Thu, 30 Sep 1999 15:24:41 +0300
The art of listening (band monitoring), Earlier this week I was almost sorry that I once again triggered the discussion about receivers and listening strategies. I did so because AR-7030 Plus - sort
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-09/msg00129.html (11,262 bytes)

8. Re: LF: Re: re Dave's Comment on filters (score: 1)
Author: Väinö Lehtoranta <>
Date: Sat, 02 Oct 1999 11:13:43 +0300
Dear LF folks, Discussion about how to improve reception, including filters, how to avoid ringing etc forms basis for succesful LF op, and succesful operation in general. About QST: I have QST on CD
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00007.html (10,662 bytes)

9. LF: G3KEV heard (score: 1)
Author: Väinö Lehtoranta <>
Date: Sun, 10 Oct 1999 12:01:58 +0300
We did some monitoring with Matti, OH2ZT. On the 9th Sept around 1930 UTC heard G3KEV calling cq on about 136.5 kHz QTH: 60:20:24.3 N 024:21:56.7 E (KP20EI41AS) AR-7030 Plus & 200m N/S wire laying on
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00068.html (8,288 bytes)

10. LF: G3KEV heard (score: 1)
Author: Väinö Lehtoranta <>
Date: Sun, 10 Oct 1999 13:13:41 +0300
Sorry to be lagging behind one whole month...it is October now... Heard three Alpha VLF stations, the two 'extra' stations probably not active. de Vaino, OH2LX -- original -- We did some monitoring w
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00069.html (8,109 bytes)

11. LF: EMRP estimations (score: 1)
Author: Väinö Lehtoranta <>
Date: Wed, 27 Oct 1999 09:15:31 +0300
Hi folks, This is just a comment. I recently wrote a short story for the Finnish SRAL magazine about Field strength measurements - which we have been doing for over 40 yrs. We have been flight measur
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00183.html (10,434 bytes)

12. LF: Fs and EMRP (score: 1)
Author: Väinö Lehtoranta <>
Date: Wed, 27 Oct 1999 19:28:21 +0300
To (temporarily) conclude discussion of "The art of measuring Fs and EMRP of an LF/MF transmitter" from my part, I (exceptionally) ATTACH short text in hope that file is small enough and everybody ca
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00189.html (12,614 bytes)

13. Re: LF: Calculating transmitter power from field strength measurements (score: 1)
Author: Väinö Lehtoranta <>
Date: Thu, 28 Oct 1999 16:31:01 +0300
Hello, I'll comment some of Dick's comments right away. I was not at all talking about skywave (which we prefer to call ionospheric wave). Ground wave is an observable and measurable resultant of dir
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00194.html (14,234 bytes)

14. LF: New EMRP estimations (score: 1)
Author: Väinö Lehtoranta <>
Date: Fri, 29 Oct 1999 13:09:06 +0300
Hi LF folks, CORRECTIONS & ADDITIONS to 136 kHz EMRP calculations: Earlier approximations were wrong, as is usually goes.. We could, at the last moment, arrange a Field strength measurements of Reino
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00199.html (10,033 bytes)

15. LF: Fs measurements (score: 1)
Author: Väinö Lehtoranta <>
Date: Sat, 30 Oct 1999 11:31:38 +0300
Along with OH1TN Field strength measurements on the 29th Oct 1999, I measured Field strength of some other VLF and LF stations heard during daytime: Fs in dB(uV/m), Det: AVE (except for Alphas) RX: R
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-10/msg00209.html (8,552 bytes)

16. Re: LF: RE: CFA (score: 1)
Author: Väinö Lehtoranta <>
Date: Sun, 14 Nov 1999 07:06:52 +0200
Friends, Let me refer to Walter, G3JKV a few months ago: Please - dont start it again... Not here anyway... 73 de Vaino, OH2LX At 21:54 13.11.1999 EST, you wrote: In a message dated 11/13/99 5:19:38
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00061.html (9,465 bytes)

17. Re: LF: Re: Re: RE: CFA (score: 1)
Author: Väinö Lehtoranta <>
Date: Mon, 15 Nov 1999 10:06:54 +0200
Real hams don't worry about blood pressures etc but CFA debate has been going on for about 10 years now especially on NEC reflector, so there is no reason whatsoever to set up another group. 73 to al
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00082.html (8,990 bytes)

18. Re: LF: aurora propagation (score: 1)
Author: Väinö Lehtoranta <>
Date: Wed, 17 Nov 1999 10:33:04 +0200
Listening report 16 Nov 1999: (by OH2LX 60N34 024E58) 21++ OH3LYG testing 2155 OZ1KMR calling CQ 2212 SM6PXJ working EI0CF (EI0CF not hrd hr) 2234 MM0ALM calling CQ (loud and clear) 2300 OZ5N working
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00118.html (9,707 bytes)

19. LF: Leonids nite observations (score: 1)
Author: Väinö Lehtoranta <>
Date: Thu, 18 Nov 1999 09:22:20 +0200
LF observations 17 Nov 1999 (136..137 kHz) by OH2LX (qth: Jokela, South Finland, KP20LN, (60N34 024E58): 1915 OH3LYG (429) calling OZ1KMR (?) 2210 SM6PXJ (219) calling somebody (?) 2216 OH1TN (429) c
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00136.html (11,557 bytes)

20. LF: Listening report 19Nov1999 (score: 1)
Author: Väinö Lehtoranta <>
Date: Sat, 20 Nov 1999 09:35:48 +0200
LF observations 19 Nov 1999 (136..137 kHz) by OH2LX QTH: Jokela, South Finland, KP20LN, (60N34 024E59) (AR7030Plus/-- 10m coax--/1:10/--15m wire--): 2146 GD4XTZ/p(329) clg (?) 2154 OH1TN (439) wkg GD
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-11/msg00161.html (8,851 bytes)


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