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Total 80 documents matching your query.

1. Re: LF: DX with 472 kHz, earth electrode antenna, 25 Watts output :-) (score: 1)
Author: IK1WVQ Mauro <>
Date: Sat, 20 Sep 2014 09:55:11 +0200
Hi Piotr, compliments.. please can you give us more information about the dimensions (and material) of the "electrodes" and how these are routed to the PA ?? What kind of soil do you have? wet? sandy
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-09/msg00085.html (11,668 bytes)

2. Re: LF: DX with 472 kHz, earth electrode antenna, 25 Watts output :-) (score: 1)
Author: IK1WVQ Mauro <>
Date: Sat, 20 Sep 2014 17:17:02 +0200
hi Piotrek, thanks for your infos. only one question again: I can try this in a field in the countryside .. this field is large (about 100 meters square) but no builds, then no ground bands in ground
/rsgb_lf_group-archives/html/rsgb_lf_group/2014-09/msg00089.html (16,661 bytes)

3. Re: LF: Qrss3 beacon test (score: 1)
Author: IK1WVQ Mauro <>
Date: Sun, 15 Feb 2015 22:28:29 +0100
Hi Luigi, your signal is ok here in JN44CB. my antenna is PA0RDT RX is a simple NE602 mixer with a MF 455kHz(yallow core) front end .. no RF preamplifier, no audio postamplifier . directly to the MIC
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-02/msg00162.html (11,037 bytes)

4. Re: LF: Qrss3 beacon test (score: 1)
Author: IK1WVQ Mauro <>
Date: Mon, 16 Feb 2015 21:59:04 +0100
good signal this evening from JN44CB complimenti Luigi! 73 de Mauro IK1WVQ At 17:03 16/02/2015, IZ7PDX Luigi D. wrote: GA OM, thanks for the report, I had to turn off the beacon in the evening for an
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-02/msg00174.html (11,208 bytes)

5. Re: LF: Qrss3 beacon test (score: 1)
Author: IK1WVQ Mauro <>
Date: Mon, 16 Feb 2015 22:08:10 +0100
hi Luigi, this is the schematic of my stupid receiver.. today I bought from Ebay a mechanical filter FZ_02 to clean a bit the spectrum. coming soon: a 20W TX (mosfet IRF510) for tests with "earth_ele
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-02/msg00175.html (11,106 bytes)

6. Re: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRPPPP... (score: 1)
Author: IK1WVQ Mauro <>
Date: Mon, 23 Mar 2015 19:20:55 +0100
Consider what the RF is produced by the internal fractional-divider "modulated" by a DMA sequence, to increase the resolution of the fractional_divider. The result is a NOT SO CLEAN spectrum !!! take
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-03/msg00288.html (12,478 bytes)

7. Re: LF: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP... (score: 1)
Author: IK1WVQ Mauro <>
Date: Fri, 27 Mar 2015 11:32:00 +0100
Hi Stefan, years ago I tried a "push_pull" (or, better, "bridge") configuration with a mosfet driver (I do not remember the code) with one section inverting, and the other not.. the power output was
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-03/msg00304.html (14,409 bytes)

8. Re: LF: Schumann Frequenz (score: 1)
Author: IK1WVQ Mauro <>
Date: Fri, 17 Apr 2015 16:17:06 +0200
PRAVDA-TV! disquieting !!! the past never dies.. This remembers me the jingle of Moscow-radio in the sixties (my first attempt to receive something in HF with a domestic radio !!) HI!! 73 de Mauro IK
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-04/msg00122.html (9,408 bytes)

9. LF: questions about a tx square loop fpr 470KHz (score: 1)
Author: IK1WVQ Mauro <>
Date: Thu, 30 Apr 2015 23:16:30 +0200
73 to all, I would like to know your opinion about this: I can made a square TX loop for 470KHz of 7 * 3 meters (see picture) in the terrace of the building where I live (6 floors). the questions are
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-04/msg00190.html (10,781 bytes)

10. Re: LF: USB stereo soundcard, CHEAP!? (score: 1)
Author: IK1WVQ Mauro <>
Date: Wed, 03 Jun 2015 22:53:47 +0200
Hi Stefan, if your soundcard is connected to a raspberry or similar, why do not try to use TWO: une for I channel, one for Q channel ??? 73 de Mauro IK1WVQ On my remote RX i'm using a cheap USB-sound
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00040.html (11,089 bytes)

11. Re: LF: Re: USB stereo soundcard, CHEAP!? (score: 1)
Author: IK1WVQ Mauro <>
Date: Fri, 05 Jun 2015 09:11:21 +0200
hi, I used this "3D sound" but the mic input is NOT STEREO as required by Stefan!!! strange but true !!! 73 de Mauro IK1WVQ Have a look at this specific product ("3D Sound" in transparent blue plasti
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00064.html (15,152 bytes)

12. Re: LF: 476.181 kHz from indoor loop (score: 1)
Author: IK1WVQ Mauro <>
Date: Wed, 24 Jun 2015 19:30:34 +0200
very interesting for WSPR tests ! few questions: - mono-turn or multi-turn ?? - what are you using for match to TX ??? many thanks and 73 de Mauro IK1WVQ The daytime groundwave signal is visible in t
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00133.html (10,310 bytes)

13. Re: LF: SAQ heard ? (score: 1)
Author: IK1WVQ Mauro <>
Date: Sun, 28 Jun 2015 11:48:32 +0200
SAQ transmission Update 2015-06-28 - 09:08 UTC " Technical problems with the antenna resulted in no transmission 09:00 UTC. We will try again at 12:00 UTC" from http://alexander.n.se/?lang=en 73 de M
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00157.html (9,402 bytes)

14. LF: test (score: 1)
Author: IK1WVQ Mauro <>
Date: Sun, 28 Jun 2015 11:51:13 +0200
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-06/msg00159.html (7,454 bytes)

15. Re: LF: Re: Band is open to VK! (score: 1)
Author: IK1WVQ Mauro <>
Date: Sat, 22 Aug 2015 19:14:47 +0200
the Marconi's trasmitter was a spark tx, with many harmonics and no selective filters .. It possible what the transatlantic contact was made using the 3° or higher harmonic ??? 73 de Mauro IK1WVQ At
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-08/msg00196.html (14,182 bytes)

16. Re: LF: Facebook LF/MF Amateur Radio Group (score: 1)
Author: IK1WVQ Mauro <>
Date: Mon, 14 Sep 2015 13:30:44 +0200
Hi, I registered myself to group "Amateur Radio Low Frequency" two day later, and I survived.. for now. I hope to continue. I am over sixty year old, and then, basically the death does not make me sc
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-09/msg00058.html (10,420 bytes)

17. Re: LF: Fwd: [rsgbtech] Alpha VLF transmitter report (score: 1)
Author: IK1WVQ Mauro <>
Date: Mon, 14 Dec 2015 13:00:37 +0100
At 11:54 14/12/2015, Andy Talbot wrote: Let's hope all the Russian nuclear submarines are home for Christmas and not trying to find their way around under the polar ice. Captain Marko Ramius of "Red
/rsgb_lf_group-archives/html/rsgb_lf_group/2015-12/msg00333.html (9,386 bytes)

18. Re: LF: De F6CNI : Testing this evening a short whip on WSPR2 MF. (score: 1)
Author: IK1WVQ Mauro <>
Date: Sun, 14 Feb 2016 12:35:41 +0100
interesting. what "conterpoise" are you using ??? 73 de Mauro IK1WVQ Hi All. This evening Iā??ll test on MF WSPR2 a short 5 meters long vertical whip. It is a thin wire inside a telescopic fiberglass
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-02/msg00192.html (11,398 bytes)

19. LF: O.T.: T2FD ANTENNA (score: 1)
Author: IK1WVQ Mauro <>
Date: Fri, 18 Mar 2016 18:13:14 +0100
Hi to all, someone has experience about the T2FD (Tilted Terminated Folded Dipole) antenna ? My need is a broadband antenna from 3.5 to 14Mhz WITHOUT any matching unit (TX 2W max)... I gladly accept
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-03/msg00254.html (11,384 bytes)

20. LF: test (score: 1)
Author: IK1WVQ Mauro <>
Date: Sat, 31 Mar 2012 22:57:15 +0200
test
/rsgb_lf_group-archives/html/rsgb_lf_group/2012-03/msg00049.html (7,453 bytes)


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