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1. Re: LF: VLF/LF-Preamp (score: 1): Author: M0FMT <[email protected]>; Date: Mon, 28 May 2012 18:40:11 +0100 (BST); Hi Peter If you are talking about the dc supply cable being both an electromagnetic antenna but also a microphone then I am sure you already know that A/ using a twisted balanced arrangement may cut; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00056.html (14,910 bytes)
2. Re: LF: VLF/LF-Preamp (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Mon, 28 May 2012 18:38:19 +0200; Hi Peter, Am 28.05.2012 17:42, schrieb pws: Hi, After all those meta-discussions here's a more serious problem: I'm playing around with a new e-field probe based on the INA111. http://www.ti.com/prod; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00194.html (11,573 bytes)
3. Re: LF: VLF/LF-Preamp (score: 1): Author: pws <[email protected]>; Date: Tue, 29 May 2012 19:14:27 +0200; Hi Mauro, Sorry about the delay. Some workload. Is this antenna also usable for 8KHZ dream bands, or for SAQ Grimeton reception ?? ... The two "probes" are only 30 cm of length, using 4 mm of insulat; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00202.html (10,297 bytes)
4. Re: LF: VLF/LF-Preamp (score: 1): Author: "Alan Melia" <[email protected]>; Date: Mon, 28 May 2012 19:18:57 +0100; Hi Peter just a quick butt-in...... dont waste money on noiseless microphone cable! :-)) This is prevent noise on low-level audio signal WHEN THE CABLE IS FLEXED AND TWISTED. It has no advantage is t; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00235.html (14,308 bytes)
5. Re: LF: VLF/LF-Preamp (score: 1): Author: "Alan Melia" <[email protected]>; Date: Thu, 28 Jun 2012 23:39:29 +0100; Hi pete another idea is to use the twisted pai as balanced and use a centre tapped transformer. Most of these troubles are caused by common mode signal due to unbalance......the ol' "holes an' poles; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00312.html (16,258 bytes)
6. Re: LF: VLF/LF-Preamp (score: 1): Author: M0FMT <[email protected]>; Date: Mon, 28 May 2012 22:57:59 +0100 (BST); /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00430.html (17,149 bytes)
7. Re: LF: VLF/LF-Preamp (score: 1): Author: IK1WVQ Mauro <[email protected]>; Date: Mon, 28 May 2012 17:57:33 +0200; unfortunately I do not know the ansver to your question, but I am VERY interested on this kind of antennas for my 137 and 500KHz rx .. please, how big are the "probes" ??? Is this antenna also usable; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00471.html (10,919 bytes)
8. LF: VLF/LF-Preamp (score: 1): Author: pws <[email protected]>; Date: Mon, 28 May 2012 17:42:43 +0200; Hi, After all those meta-discussions here's a more serious problem: I'm playing around with a new e-field probe based on the INA111. http://www.ti.com/product/ina111 Schematic: http://www.df3lp.de/mi; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-05/msg00590.html (9,715 bytes)
9. Re: LF: VLF/LF-Preamp (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Fri, 10 Aug 2012 01:11:23 +0200; Hello Peter, LF, It took a bit longer due to all the MF projects but now i finally tried your symmetric preamp. One hour ago i finished the board, see https://dl.dropbox.com/u/19882028/LF/DSC04409.JP; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-08/msg00099.html (11,506 bytes)
10. Re: LF: VLF/LF-Preamp (score: 1): Author: pws <[email protected]>; Date: Fri, 10 Aug 2012 20:20:32 +0200; Hi Stefan, You wrote: ... However it does not work really well in the first attempt. The probes are just 2 short wires from the resistors. If i come closer to one of them with my hand i am getting so; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-08/msg00178.html (10,247 bytes)

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