Quote:
Originally Posted by N2IXK
The ohms range test voltage on VTVMs was typically provided by a 1.5V "D" cell battery, not derived from the line voltage.
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You are correct about the VTVM , and in fact , there is only one handy way I know of to test higher voltage capacitors at close to their actual working voltages . This type of cap checker is capable of supplying up to 450 volts for the "dielectric breakdown" (leakage) function of test . These testers were made by Heathkit , Sprague , and RCA among others , and almost all of them use the eye tube as their method of indication .
No modern day , 9V battery supplied meter , will come close to the "real world" results produced by one of these . Sure , they can tell you value and internal resistance , but only the real world voltage test will reveal whether or not the cap will hold up at the intended operating voltage ....
PS , sorry for the crappy cell phone pictures , it's all I got to work with . If a picture is worth 1000 words , well maybe a somewhat blurry one is still worth a good 500 or so
