[volt-nuts] Fluke 720a self calibration repair

[Tony]

They are now $92.55 from Arrow now and Farnell want over $200 each if 
you buy 25 or more!!!! There don't seem to be any obvious cheap 
alternatives for 10 turn 20ppm/C 5W pots.

Do they need to be 5W? Is that to minimize self heating?

The TT Electronics 7286 series are 10 turn, 2W, 20ppm/C, but only $10.66 
for 25+. Or you could use 2 10K ohm 7270 series in parallel at $8.45 
each for 50+ if you could fit them in somehow!


On 25/09/2015 20:10, Charles Black wrote:
> Hi David,
>
> I had to look it up. The company was Arrow (800 833 3557). The pots 
> were manufactured by Bournes with a manufacturer part number of 
> 300SP-1-502. Unit cost $7.73 in 2011. I bought 26 so my cost was about 
> $200. I wanted a "Manufactured in America" part but can't remember if 
> that was too pricey or not.
>
> Charlie
>
> On 9/25/2015 9:45 AM, David Garrido wrote:
>> I like that Idea.  Do you recall the part number of the resistors you 
>> found?
>>
>> Cheers,
>>
>> David
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