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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+RE\:\s+Todmorden\s+receiver\s*$/: 53 ]

Total 53 documents matching your query.

1. LF: RE: Todmorden receiver (score: 1)
Author: <>
Date: Sat, 25 Nov 2017 18:30:30 -0500
Hello Paul, I'm guessing that you've considered all of the below but just in case: Erratic power supply startup related to the comparatively high source resistance of long wires and associated connec
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00231.html (14,150 bytes)

2. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Mon, 27 Nov 2017 19:26:43 +0000
When I checked the data sheet for the IP1215S isolating DC-DC converter I spotted that it said max 47uF load capacitance - and I had 100uF hanging on each rail. Hopefully that's the answer. For some
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00256.html (10,431 bytes)

3. RE: LF: RE: Todmorden receiver (score: 1)
Author: <>
Date: Mon, 27 Nov 2017 17:31:57 -0500
Hello Paul, Based on the those additional details, it might be worth a quick check of the voltage-loop stability margin: if for example your load draws 50 ma, briefly add a 390 ohm 2W resistor across
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00258.html (11,874 bytes)

4. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Wed, 29 Nov 2017 17:11:48 +0000
The re-built E-field rx was put outside this afternoon for a on-air trial. Pre-amp inside the antenna tube http://abelian.org/vlf/tmp/171129a.jpg I'm a bit worried about noise from light getting into
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00268.html (11,976 bytes)

5. RE: LF: RE: Todmorden receiver (score: 1)
Author: <>
Date: Wed, 29 Nov 2017 14:25:58 -0500
Hello Paul, By noise from light do you mean shot noise from the average solar flux? I tried a quick calculation yielding < 1 nV/rt-Hz, and I guessed that your noise voltage density is more than 10x t
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00269.html (13,003 bytes)

6. RE: LF: RE: Todmorden receiver (score: 1)
Author: VIGILANT Luis Fernández <>
Date: Thu, 30 Nov 2017 08:19:20 +0000
Thank you very much for the details on your fine receiver Paul Can you explain what's vcat++ ? I'm missing something here. Probably you explained that before :( 73 de Luis EA5DOM
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00271.html (11,200 bytes)

7. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Thu, 30 Nov 2017 10:48:03 +0000
You can listen to the rx through the link http://78.46.38.217/vlf1.m3u The wind has picked up a bit today and there's a scratching crackling noise appeared. Something mechanical by the sound of it. I
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-11/msg00272.html (12,256 bytes)

8. Re: LF: RE: Todmorden receiver (score: 1)
Author: DK7FC <>
Date: Fri, 01 Dec 2017 01:40:12 +0100
Am 30.11.2017 11:48, schrieb Paul Nicholson: vtcat is a program in vlfrx-tools which moves signal streams around and maybe changes the sample format. The ++ option specifies a network connection to s
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00001.html (10,330 bytes)

9. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Tue, 5 Dec 2017 11:09:45 +0000
New H-field rx is coming along well. Design changes are completed - it has a lower system noise, wider bandwidth, significantly lower common mode response, and a much better line driver. Like the new
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00058.html (11,102 bytes)

10. Re: LF: RE: Todmorden receiver (score: 1)
Author:
Date: Tue, 5 Dec 2017 08:45:35 -0330 (NST)
Thank-you for the update, Paul. It't amazing that 10 uW can be detected over there - almost like spooky action at a distance, with only a few hundred billion photons per second. The carrier is phase
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00059.html (11,531 bytes)

11. Re: LF: RE: Todmorden receiver (score: 1)
Author: DK7FC <>
Date: Tue, 05 Dec 2017 13:41:38 +0100
Hi Joe, Am 05.12.2017 13:15, schrieb : The carrier is phase stabilised by Spec Lab so the tuning coil can be peaked without glitching the phase and the current is also periodically adjus
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00060.html (11,240 bytes)

12. Re: LF: RE: Todmorden receiver (score: 1)
Author: DK7FC <>
Date: Tue, 05 Dec 2017 13:44:41 +0100
Sounds good! What do you estimate, what is the 'gain' on 2970 Hz relative to the old system from the last season? Soon there will be a signal on 5170 Hz again. Next week at the latest. 73, Stefan Am
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00061.html (11,820 bytes)

13. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Sun, 10 Dec 2017 11:42:02 +0000
Ground to a halt this weekend on the new H rx, waiting for parts. There's always something that's out of stock! http://abelian.org/vlf/tmp/171210a.jpg I decided I could fit both pre-amp and line driv
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00139.html (12,390 bytes)

14. Re: LF: RE: Todmorden receiver (score: 1)
Author: John Bruce McCreath <>
Date: Sun, 10 Dec 2017 22:24:55 -0500
73, J.B., VE3EAR LowFER Beacon "EAR" 188.830 kHz. QRSS30 EN93dr
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00153.html (12,507 bytes)

15. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Tue, 12 Dec 2017 08:29:34 +0000
Parts have arrived so I can continue now with the new 2-chan H rx. Meanwhile, the new spectrogram is more or less working properly. http://abelian.org/vlf/fbins3.html Thanks a lot to Markus for advis
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00173.html (12,304 bytes)

16. Re: LF: RE: Todmorden receiver (score: 1)
Author: Paul Nicholson <>
Date: Tue, 12 Dec 2017 09:42:44 +0000
I think I've got the Hann window working now, it looks a lot better and sharpens up the spectrogram quite nicely, eg http://abelian.org/vlf/fbins3.html#p=1512457200&b=285&s=sp&m=cardioid&w=h&c=1 Than
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00175.html (11,935 bytes)

17. Re: LF: RE: Todmorden receiver (score: 1)
Author:
Date: Tue, 12 Dec 2017 09:13:23 -0330 (NST)
Sadly this appears as boxes with a blue background without spectrogram. Is there something I can try? Hopefully there was another message last night. 73 Joe I think I've got the Hann window working n
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00178.html (11,602 bytes)

18. Re: LF: RE: Todmorden receiver (score: 1)
Author: <>
Date: Tue, 12 Dec 2017 08:01:01 -0500
Joe, Paul Works good here on both XP/SP3/Firefox and Win10/Firefox. Impressive stuff Paul! Jay W1VD WD2XNS WE2XGR/2 Sadly this appears as boxes with a blue background without spectrogram. Is there so
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00179.html (13,330 bytes)

19. Re: LF: RE: Todmorden receiver (score: 1)
Author: N1BUG <>
Date: Tue, 12 Dec 2017 08:05:58 -0500
Same here but after waiting a minute or so the spectrogram fills in with data and everything works. I think it needs time to download or process data? Firefox Quantum 57.0.1 on Ubuntu. I must say alt
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00180.html (12,893 bytes)

20. Re: LF: RE: Todmorden receiver (score: 1)
Author:
Date: Tue, 12 Dec 2017 09:41:39 -0330 (NST)
Thanks Dex. Inpressive indeed! Joe Joe, Paul Works good here on both XP/SP3/Firefox and Win10/Firefox. Impressive stuff Paul! Jay W1VD WD2XNS WE2XGR/2 -- Original Message -- From: <> To:
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-12/msg00181.html (13,047 bytes)


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