In Reply to: RE:I have a 200ma Fluke or something like that. posted by DAK on June 18, 2017 at 16:55:51:
Using a ma meter as a ma meter should be straight forward, but not all ma meters are created equal, some expect you to know to put in a shunt resistor but others have this built in. Use a battery and a resistor, figure out current and put the meter in series, if it reads correctly (you can verify with a digital meter), then fine, just insert it. That being said, I'm always nervous of wires and screw terminals coming lose so I put a shunt to ground, like 100 ohms. The small resistance of the ma meter will swamp that resistor in normal practice, but if the meter connection opens, the output tubes will not red-plate.
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Follow Ups
- RE:I have a 200ma Fluke or something like that. - SteveBrown 07:23:40 06/19/17 (5)
- That seems like a good idea - DAK 09:18:11 06/19/17 (4)
- RE: That seems like a good idea - SteveBrown 22:27:22 06/28/17 (0)
- RE: Depends on how it's biased - deafbykhorns 18:09:35 06/19/17 (1)
- RE: Depends on how it's biased - SteveBrown 08:12:02 06/20/17 (0)
- RE: That seems like a good idea - SteveBrown 17:59:27 06/19/17 (0)