Calibration resistors
Ancient_Hacker wrote in
ps.com:
On May 18, 7:19 am, "N Cook" wrote:
What structure/type of resistors would be best for purest R resistors
to make up and be measured with an accurate calibrated measurement
bridge. Normal off the shelf resistors that is, secondary standard
level of accuracy is not required.
Required a few, odd values like 374 ohm +/- 2 ohm , butactual values
known accurately to +/- 0.01%, in the range 20 ohm to 100K
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list
onhttp://home.graffiti.net/diverse:graffiti.net/
You can buy 0.01% resistors, but they're not cheap!
Alternatively, there used to be a guy on eBay that sold resistor
kits-- He'd measure some wirewound resistors with a GOOD ohmmeter, and
mark them with their measured values, to 0.01% or so IIRC.
I'd want to know what "good ohmmeter" he was using before I spent any money
on his "precision" resistors.
--
Jim Yanik
jyanik
at
kua.net
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