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Old 02-19-2014, 07:38 PM
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init4fun init4fun is offline
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Originally Posted by Username1 View Post
Don't forget when a lot of those manuals were written meters were resistive VOM's and possibly even VTVM's and not Digital meters, that are possibly reading peaks of the pulses coming through the rectifier, and possibly not the more lower average reading the older meters may have been indicating. Higher line voltage also a very valid factor....
Yep , the voltage figures on the schematics were likely taken with a voltmeter with around 10K ohms per volt loading , wheras modern meters are much higher (Maybe 1 to 5 Meg per volt ?) . Since the new meter puts less load on the circuit the voltage reading is higher .

Solution = get a nice old VOM like my favorite , the old reliable Simpson 260

PS , Most voltage charts will have a caption somewhere saying "Voltages measured with 10K per volt meter" or something similar .....
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Last edited by init4fun; 02-19-2014 at 07:42 PM.
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