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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Mini\s+Whip\s+and\s+local\s+noise\s*$/: 13 ]

Total 13 documents matching your query.

1. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Mon, 04 Feb 2008 23:58:41 +0100; Roelof Bakker wrote: Hello Alberto, Your program Spectran is in wide use amongst NDB chasers. Someone had the following question: -- snip -- Hi Roelof, that question was posed in the SDR-IQ Yahoo gro; /rsgb_lf_group-archives/html/rsgb_lf_group/2008-02/msg00357.html (12,661 bytes)
2. Re: LF: Re: Mini Whip and local noise (score: 1): Author: Stewart Bryant <[email protected]>; Date: Sun, 03 May 2009 23:07:07 +0100; Alberto di Bene wrote: I have simulated the mini whip with PSpice, and the results are quite good. In the schematic below, the V3 source and the 10pF capacitor simulate the whip itself. Total current; /rsgb_lf_group-archives/html/rsgb_lf_group/2009-05/msg00251.html (9,922 bytes)
3. Re: LF: Re: Mini Whip and local noise (score: 1): Author: Stewart Bryant <[email protected]>; Date: Sun, 03 May 2009 23:11:27 +0100; Sorry for the bandwidth - the previous email was part of one intended for Alberto - but I hit send before I corrected the "To". Stewart/G3YSX; /rsgb_lf_group-archives/html/rsgb_lf_group/2009-05/msg00301.html (9,078 bytes)
4. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Thu, 19 Jan 2006 18:37:33 +0100; In principle both antennas performed equally well in receiving NDB's. If there was a difference, the active whip gave just a little better result. Noise bursts hardly if at all audible on the active; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00311.html (10,898 bytes)
5. Re: LF: Re: Mini Whip and local noise (score: 1): Author: [email protected]; Date: Thu, 19 Jan 2006 23:22:16 +0100; Roelof, have you by any chance compared your active whip with the Amrad E-field probe? Both work on the same principles and it would be interesting to know how do they compare. 73 Alberto I2PHD P.S.; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00318.html (11,002 bytes)
6. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Fri, 20 Jan 2006 00:49:31 +0100; Hi Alberto, do you have a description of the Amrad E-field probe? I cant find it on the net. Regards Uwe/dj8wx Hi Uwe, probably you haven't found it because it is referred to as "Amrad active antenna; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00320.html (11,952 bytes)
7. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Fri, 20 Jan 2006 00:58:48 +0100; and here you can find some notes by Amrad on it : http://www.pacificsites.com/~brooke/LF-Ant.shtml You may want also to check this page : http://www.amrad.org/projects/lf/actant/faq.htm 73 Alberto I2; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00321.html (11,453 bytes)
8. LF: Re: Mini Whip and local noise (score: 1): Author: "James Moritz" <[email protected]>; Date: Fri, 20 Jan 2006 01:03:39 +0100; Dear Roleof, LF Group, Most radio amateur textbooks state that qrm from a local noise source is due to the electric part of the electro-magnetic field and has a vertical polarisation. An active whip; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00322.html (15,334 bytes)
9. Re: LF: Re: Mini Whip and local noise (score: 1): Author: John Andrews <[email protected]>; Date: Fri, 20 Jan 2006 00:56:19 +0000; Jim's comments make sense, and I hope to do some experiments as time permits. I have been treating LF receive loops as balanced antennas, with no intended ground reference. This has been easy in my c; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00324.html (11,693 bytes)
10. LF: Re: Mini Whip and local noise (score: 1): Author: "MIKE REID" <[email protected]>; Date: Fri, 20 Jan 2006 16:24:45 -0600; I have samples of the 2N5109 on their way here. http://www.microsemi.com/catalog/part.asp?ID=18715 http://www.microsemi.com/catalog/part.asp?ID=18715 That's the link to the manufacturer's webpage whe; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-01/msg00340.html (13,193 bytes)
11. Re: LF: Re: Mini Whip and local noise (score: 1): Author: Andre Kesteloot <[email protected]>; Date: Wed, 01 Feb 2006 20:16:30 -0500; Alberto di Bene wrote: Hi Uwe, probably you haven't found it because it is referred to as "Amrad active antenna". Here is the PDF file describing it : http://www.arrl.org/tis/info/pdf/0109031.pdf and; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-02/msg00286.html (22,265 bytes)
12. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Tue, 07 Feb 2006 00:43:44 +0100; I have simulated the mini whip with PSpice, and the results are quite good. In the schematic below, the V3 source and the 10pF capacitor simulate the whip itself. Total current from the power supply; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-02/msg00425.html (11,014 bytes)
13. LF: Re: Mini Whip and local noise (score: 1): Author: Alberto di Bene <[email protected]>; Date: Tue, 07 Feb 2006 00:53:30 +0100; ....hmmmm, I couldn't wait until tomorrow, so I installed the antenna on the roof at the end of the afternoon, then ran in the shack to listen to it (or with it...) At LF it performs very well, Rugby; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-02/msg00426.html (10,630 bytes)

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