[Boatanchors] Voltage Calibrator

[David C. Hallam]

Charlie, Thanks for the hint.  I need only a 1V source as the HP-410B 
calibrates only the 1 VDC scale.  All other scales are derived from 
built in precision resistors.

David
KW4DH

On 12/29/2011 6:40 PM, Charlie Cheney wrote:
> They aren't boatanchors, but there are many solid state voltage
> reference ICs with precisions as good as 0.1% out of the box. They cost
> a couple of bucks in single unit quantities. The 6035 is available in a
> 5V version and will source 10 mA. Its initial accuracy is spec'd at
> +-0.2%. This is probably better than you will get from a cheapo DVM. One
> of these and a few 0.1% resistors as your primary standards and you can
> calibrate the higher scales with a stable HV source into a divider. Of
> course the source resistance of the divider needs to be much lower than
> the input of your meter.
>
> I've built a couple of calibration boxes along these lines. Tried to get
> the idea into Hints&  Kinks once but I think they considered the concept
> of calibrating a measuring instrument too academic for the general ham
> population.
>
> 73,
>
> Charlie K1LDZ
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