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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Some\s+improvements\s+in\s+VLF\s+Rx\s*$/: 10 ]

Total 10 documents matching your query.

1. LF: Some improvements in VLF Rx (score: 1)
Author: VIGILANT Luis Fernández <>
Date: Mon, 8 May 2017 08:57:48 +0000
Hi VLF This weekend could fix the QRM problem with the VLF E-probe. There was a ground loop at the 1pps from GPS The ground of the GPS (and PC via USB) was routed to the audio transformer at the VLF
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00078.html (16,919 bytes)

2. Re: LF: Some improvements in VLF Rx (score: 1)
Author: DK7FC <>
Date: Thu, 11 May 2017 15:33:50 +0200
Hi Luis, Am 08.05.2017 10:57, schrieb VIGILANT Luis Fern&aacute;ndez: The VLF espectrogram has got clearer, but still contaminated. Specially at night, probably due to street led lights in the area h
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00119.html (12,429 bytes)

3. Re: LF: Some improvements in VLF Rx (score: 1)
Author: DK7FC <>
Date: Thu, 11 May 2017 15:40:36 +0200
PS: There are a number of settings you could improve in this wideband spectrogram. If you send me your usr file i would send you one back with some changes, if you like. Also it may be worth to start
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00120.html (13,702 bytes)

4. RE: LF: Some improvements in VLF Rx (score: 1)
Author: VIGILANT Luis Fernández <>
Date: Fri, 12 May 2017 09:43:03 +0000
Hi Clemens and Stefan Thank you for the ideas to improve Rx in VLF Yes the noise background is dominated by 'horizontal' traces, not by vertical traces, i.e. QRM (unwanted) instead of QRN (expected i
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00126.html (19,496 bytes)

5. Re: LF: Some improvements in VLF Rx (score: 1)
Author: DK7FC <>
Date: Fri, 12 May 2017 14:19:03 +0200
Hi Luis, Am 12.05.2017 11:43, schrieb VIGILANT Luis Fern&aacute;ndez: I can add an SMD ferrite bead (0805) in the gate Worth to try. The voltage in the coax down in the shack after the 390R is 6V. Po
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00128.html (14,534 bytes)

6. RE: LF: Some improvements in VLF Rx (score: 1)
Author: VIGILANT Luis Fernández <>
Date: Fri, 12 May 2017 15:45:21 +0000
Thank you Stefan The SL instance is updated with the modified USR file. Non stopped, so you can see the difference https://ea5dom.ure.es/grabber/index.html 73 de Luis EA5DOM De:
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00131.html (15,848 bytes)

7. Re: LF: Some improvements in VLF Rx (score: 1)
Author: DK7FC <>
Date: Fri, 12 May 2017 20:39:09 +0200
Hi Luis, I just made some cosmetics, no changes in the signal path. It looks better than expected now. Worth to try a first test in 47 uHz. I will send you a usr file for 47 uHz, 8.27 for the grabber
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00132.html (11,709 bytes)

8. Re: LF: Some improvements in VLF Rx (score: 1)
Author: VIGILANT Luis Fernández <>
Date: Sat, 13 May 2017 09:43:04 +0000
Thank you Stefan Waiting for your config file ;-) 73 de Luis EA5DOM El 12 may. 2017 8:43 p. m., DK7FC <> escribió: Hi Luis, I just made some cosmetics, no changes in the signal
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00135.html (9,914 bytes)

9. RE: LF: Some improvements in VLF Rx (score: 1)
Author: "Clemens Paul" <>
Date: Sat, 13 May 2017 15:17:21 +0200
Hi Luis & Stefan, Hum means H-fields. Coax shield is completely transparent i.e. without any effect to H-fields. The question is where the hum is being picked up. 73 Clemens DL4RAJ LF_Soundcard_32KHz
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00137.html (13,765 bytes)

10. Re: LF: Some improvements in VLF Rx (score: 1)
Author: DK7FC <>
Date: Sat, 13 May 2017 18:38:40 +0200
Hi Luis, Try the one in the attachment. Note that the frequency marker could cover a narrow peak... 73, Stefan Am 13.05.2017 11:43, schrieb VIGILANT Luis Fernández: Thank you Stefan Waiting for your
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00140.html (10,797 bytes)


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