- Posted by

In Reply to:
Blown resistor posted by **sgdouglas@dccnet.com**
on March 4, 2012 at 20:52:30:

47 is 3 less than 50 & 56 is 6 more than 50. 3/50=0.06 or 3 is 6% of 50. Typically such crossover parts themselves have +,-10% deviation per value-as-marked tolerances which means the original resistor may have measured anywhere from 45 ohms to 55 ohms despite its' 50-ohm marking. So replacing a 50-ohm part with a 47-ohm part is not only OK, but within part specification. If only a 56-ohm part were available, even that will be fine but 47 is the slightly better choice of those two.

Edits: 03/05/12 03/05/12 03/05/12

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Public School math-Ron Oehlert08:55:40 03/05/12(7)

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sgdouglas@dccnet.com20:28:15 03/05/12(6)

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John Elison22:37:49 03/05/12(5)

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sgdouglas@dccnet.com07:20:37 03/06/12(2)

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John Elison08:19:40 03/06/12(1)

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sgdouglas@dccnet.com07:16:46 03/06/12(1)

- RE: Public School math -
John Elison08:13:41 03/06/12(0)