[Elecraft] K2 #6602 build: AGC question

[Marinus Loewensteijn]

Assembly part I completed. All tests completed. Unfortunately in the part "Setting AGC threshold" I am finding that I cannot adjust R1 for a reading of 3.80 V on the DMM. The highest it will go to is 3.695 V. I have checked all the resistor values in their locations and cannot fault those.
 
Is this due to different tolreances fo the parts or have different IC's been used that create this discrepancy?
 
Thanks, Marinus, ZL2ML
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