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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*AW\:\s+LF\:\s+Re\:\s+9kHz\s+noise\s+level\s*$/: 6 ]

Total 6 documents matching your query.

1. AW: LF: Re: 9kHz noise level (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Sat, 27 Feb 2010 14:53:54 +0100
Dear group, It seems that there are interesting theoretical questions to answer. And we, the practical interested's, could do this by trying that. Anyway if it is over 10km or 200km... Maybe we'll ge
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00289.html (12,672 bytes)

2. Re: AW: LF: Re: 9kHz noise level (score: 1)
Author: Wolfgang Büscher <[email protected]>
Date: Sat, 27 Feb 2010 15:41:15 +0100
Hi Stefan, Thanks for the proposals, and the boost of activity. I have passed on a few notes to the yahoo VLF group, so if you have more details about the kite antenna experiments (or even a schedule
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-02/msg00314.html (11,840 bytes)

3. Re: AW: LF: Re: 9kHz noise level (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Wed, 03 Mar 2010 11:50:03 +0000
2 metre whip or wire, short wire connection to low noise JFET pre-amp, 10MOhm bias resistor, battery powered, ground resistance < 500 ohms, coax to house, transformer to break the ground loop. If pos
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00073.html (15,229 bytes)

4. Re: AW: LF: Re: 9kHz noise level (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 06 Mar 2010 07:27:58 +0000
Here's a live spectrum for 8970 +/- 1Hz - resolution is 5mH. Amplitude calibration is only within a factor of two or so. http://abelian.org/vlf/nb.shtml Ich habe die Frage gestellt. -- Paul Nicholson
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00114.html (11,262 bytes)

5. AW: LF: Re: 9kHz noise level (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Thu, 4 Mar 2010 00:23:48 +0100
Hello Paul, LF, I plan to transmit on 8,9700 kHz. Maybe, if i am in phone contact during the test i make QSY of some Hz if the RXing station has a carrier/line on this QRG. Or would this be a problem
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00169.html (13,332 bytes)

6. AW: LF: Re: 9kHz noise level (score: 1)
Author: Stefan Schäfer <[email protected]>
Date: Tue, 2 Mar 2010 22:01:30 +0100
Excellent Paul! Tnx for motivation ;-) I know the LT1028 as the best audio op amp (available for noncommercial customers) for such applications and have also built a narrow band LF preamp with it. In
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00357.html (12,099 bytes)


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