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21. Re: [Amps] high voltage fuses (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Thu, 10 Oct 2013 11:11:47 -0400; This also applies to the plate meter or any low-resistance current meter, which nearly all of them are. 73, Bill W6WRT Good info Bill -- and it's not a difficult exercise, beyond simple algebra to so; /archives//html/Amps/2013-10/msg00182.html (9,423 bytes)
22. Re: [Amps] high voltage fuses (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 10 Oct 2013 11:30:23 -0400; The HV fuses Im referencing and have here came from military and industrial equipment. Perhaps those engineers didnt know as much as you (-; Instantaneous peak current can be a lot more than 5-10% mo; /archives//html/Amps/2013-10/msg00183.html (13,046 bytes)
23. Re: [Amps] high voltage fuses (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Thu, 10 Oct 2013 08:34:09 -0700; ORIGINAL MESSAGE: (may be snipped) REPLY: No. The meter and resistor are in series. The diode is placed across the both of them. In other words, the diode goes from the side of the meter which is not; /archives//html/Amps/2013-10/msg00184.html (9,007 bytes)
24. Re: [Amps] high voltage fuses (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Thu, 10 Oct 2013 08:49:09 -0700; There's a lot of HV fuses over on the "evil empire". 73, Dick, W1KSZ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2013-10/msg00185.html (9,888 bytes)
25. Re: [Amps] high voltage fuses (score: 1): Author: Vic K2VCO <k2vco.vic@gmail.com>; Date: Thu, 10 Oct 2013 09:13:53 -0700; We used to call this the 'voltmeter method' of measuring current. You put a resistor in series with a milliammeter to convert it into a voltmeter -- and then use it to measure the voltage drop across; /archives//html/Amps/2013-10/msg00186.html (10,852 bytes)
26. Re: [Amps] high voltage fuses (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Thu, 10 Oct 2013 14:13:08 -0700; ORIGINAL MESSAGE: (may be snipped) REPLY: No, that's not the same method. Yours works fine too, but it's different. My method uses a current meter, not a voltmeter. The meter would be the same range; /archives//html/Amps/2013-10/msg00187.html (9,231 bytes)
27. Re: [Amps] high voltage fuses (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 11 Oct 2013 02:36:50 +0000; I'd like to point out that you should not use "FAST" diodes. Use power diodes. If you use fast diodes you risk rectifying RF signal and getting odd readings on your meters. I have actually seen this; /archives//html/Amps/2013-10/msg00189.html (10,778 bytes)
28. Re: [Amps] high voltage fuses (score: 1): Author: "Ian White" <gm3sek@ifwtech.co.uk>; Date: Fri, 11 Oct 2013 10:34:05 +0100; and friend's Agreed, I have seen the same. Swapping the "fast" diode for a plain vanilla rectifier cured the strange readings on Top Band. large There is absolutely no need to sacrifice the meter dio; /archives//html/Amps/2013-10/msg00191.html (10,469 bytes)
29. Re: [Amps] high voltage fuses (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 11 Oct 2013 04:44:46 -0700; REPLY: For what seems like the millionth time, placing diodes directly across the grid meter will not protect it. You must place a resistor in series with the meter and connected the diodes across th; /archives//html/Amps/2013-10/msg00194.html (10,571 bytes)
30. Re: [Amps] high voltage fuses (score: 1): Author: Bill Turner <dezrat1242@yahoo.com>; Date: Fri, 11 Oct 2013 06:14:07 -0700; ORIGINAL MESSAGE: (may be snipped) REPLY: Reminds me of the old definition of a transistor: A solid state device designed to blow quickly in order to protect the fuse. Frankly, I think it's foolish t; /archives//html/Amps/2013-10/msg00196.html (8,219 bytes)
31. Re: [Amps] high voltage fuses (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 11 Oct 2013 15:48:04 +0000; A tech that I knew had a problem with IGBT's, Insulated Gate Blowup Transistors" 73 Bill wa4lav ORIGINAL MESSAGE: (may be snipped) REPLY: Reminds me of the old definition of a transistor: A solid sta; /archives//html/Amps/2013-10/msg00197.html (8,965 bytes)

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