>>
>>
>>I looked up the 723, and the maximum suggested resistors are 10K. ...
>
>I looked at the National Semiconductor data sheets for the 723. I saw
>no such suggestion.
> - From practical experience, I know that it often takes a series R of
>more than 10k in series with the sampled input to make a 723 resistant
to
>high RF fields.
> - Rich -
You'll find the resistor values in very small type ( and I mean small! -
too small for comfort for a 50 year old like me) on the diagrams and the
footnotes, where they equal up the resistors for minimum drift, and
specify drifts with resistors <10k.
73
Peter G3RZP
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