Ed Anderson wrote:

 Tracy, I noticed that you changed the value for R1 from 10K on the

original

drawing I have (see attached) to 20K on the drawing posted to the

Rotaryeng

list.  I presume you have found that this gives better results??

Ed

Modeled the circuit using a SPICE simulator and got slightly better
linearity with the higher value.  Difference is so small that I doubt anyone
would notice.  Not worth changing if already built.

Tracy

 
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