[Milsurplus] hi volt choke testing questions

[Bob W7AVK]

One other caveat - Be careful of the L di/dt factor.  That is if you put 
a DC current through the choke and remove it suddenly you can get a very 
nasty voltage spike.  Low range ohm meters have been know to get zapped 
when they were used to measure the DC resistance of a large choke on the 
X1 scale and then the leads are removed.  The voltage spike could be 
enough to arc inside the meter and blow its pc board.

Don't ask how I know  :-)   Took me a long time to repair the Simpson 260.

Good luck

73  Bob  W7AVK


aGEnuine Ham wrote:
> I just thought of one other caveat about that measurement.  Since the
> choke is likely to be a swinger, that makes it non-linear.  So, you need
> to be careful about what kind of meter you use to measure the AC voltage,
> as the waveform will likely not be sinusoidal.  And, I haven't thought
> about it long enough to suggest which one is best, but probably a true
> RMS meter like tha Fluke 8060 or equivalent.  Maybe not, though, I'll
> defer to anyone who has actually thought this thing all the way through.
> 
> 73,
> George
> W5VPQ
> 
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