Measure how much current the meter draws when you apply its full range voltage. Then place a resistor in series with the meter with a value that will beHi all
I use a vintage US Army VOM. Its Ohm range is supplied by 1.35 volt. I have tried 1,5 volt cell but its needle always exceeds meter scale. How can I deliver 1.35 volt from 1.5 volt? Your ideas are highly appreciate. Thank you in advance
Legac
No. The model is ME-70A-PSM6. It looks like for Navy because it is sealed carefully.Is the v.o.m compatable with testing transistor curcuits ?
Use one resistor for each scale or the best solution is to replace the old voltmeter with a cheap and nice digital multimeter.Thank all of you. I will try the options and get back to you once I have resolved the problem. Perhaps I will try Ge transistor first. I am thinking about another option, that is to use two small 1.5 volt cells in series to have 3 volts. It would be easier to make it down to 1.35 volt.
@ mik3: Resistor in series is not workable because each range draws a different current.
Rgds
Legac
HiUse one resistor for each scale or the best solution is to replace the old voltmeter with a cheap and nice digital multimeter.
Very Wise.However I still use the military VOM for tube amplifier because of the high risk potential.
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