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1. Re: LF: RF ammeter question (score: 1): Author: Chris Trayner <[email protected]>; Date: Tue, 11 Jan 2011 11:43:20 +0000; Hi John, I have a box of 5000 1N4148s at work. I might be able to spare you the odd one or two ;-) 73, Chris G4OKW -- Dr Chris Trayner School of Electronic & Electrical Engineering, The University of; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00068.html (10,170 bytes)
2. Re: LF: RF ammeter question (score: 1): Author: Markus Vester <[email protected]>; Date: Tue, 11 Jan 2011 08:04:13 -0500; John, the 1N4007 can actually be useful as a varicap replacement to pull an oscillator. 73, Markus (DF6NM) LF, I have built the fullwave rectified version of the design shown on page 10.33 of the RSG; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00142.html (10,221 bytes)
3. Re: LF: RF ammeter question (score: 1): Author: John Rabson <[email protected]>; Date: Tue, 11 Jan 2011 13:11:56 +0100; Thank you everyone for your comments. I have found some 1N5822 Schottky diodes so may try those. Chris: 1N4148 - yes please. John F5VLF; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00430.html (10,306 bytes)
4. RE: LF: RF ammeter question (score: 1): Author: Rik Strobbe <[email protected]>; Date: Tue, 11 Jan 2011 14:14:34 +0100; indeed, see http://www.on7yd.strobbe.eu/500khz/ant-bridge/ 73, Rik ON7YD Van: [email protected] [[email protected]] namens Markus Vester [[email protected]] Verzo; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00450.html (12,084 bytes)
5. Re: LF: RF ammeter question (score: 1): Author: John Rabson <[email protected]>; Date: Tue, 11 Jan 2011 15:56:40 +0100; 73, Markus (DF6NM) =; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00458.html (11,028 bytes)
6. Re: LF: RF ammeter question (score: 1): Author: "Julian Hardstone" <[email protected]>; Date: Tue, 11 Jan 2011 12:59:07 +0100; In that quantity the 4148 costs less than one pence, so before you go buying stamps let John pull a couple out of any scrap pcb he has lying about - there's always some small glass diodes which would; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00461.html (9,915 bytes)
7. LF: RF ammeter question (score: 1): Author: "John RABSON" <[email protected]>; Date: Tue, 11 Jan 2011 12:16:46 +0100; LF, I have built the fullwave rectified version of the design shown on page 10.33 of the RSGB Handbook 10th edition. It reads correctly at 25kHz but only show 1/3 of the correct value at 136. Not hav; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00473.html (8,804 bytes)
8. RE: LF: RF ammeter question (score: 1): Author: Rik Strobbe <[email protected]>; Date: Tue, 11 Jan 2011 13:43:24 +0100; John, 1N5822 is a schottky rectifier diode, most of these are not so fast and have a large reverse capacitance (some 100pF) 73, Rik ________________________________________ Van: owner-rsgb_lf_group@b; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg00923.html (11,674 bytes)

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