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1. Re: LF: Loop preamplifier (score: 1): Author: "James Moritz" <[email protected]>; Date: Tue, 05 Nov 2002 18:53:16 +0000; Dear Urban, LF Group, The 2N3819:s are replaced by high current FET:s BF246C (the same pinout). R3 and R4 are decreased from 2.2k to 270ohms The source lead in each FET is broken up and 150 ohm (see; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00368.html (11,052 bytes)
2. LF: Loop preamplifier (score: 1): Author: "Urban ekholm" <[email protected]>; Date: Fri, 1 Nov 2002 21:51:40 +0100; Hello all ! I have made some experimenting with the loop preamplifier described on page 29-30 in the Low Frequency Experimenters Handbook and below I share my results. In the evenings I have had seve; /rsgb_lf_group-archives/html/rsgb_lf_group/2002-11/msg00439.html (12,020 bytes)

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