[Elecraft] Using Digital VM? (Control Board K2 # 5422)

[Ron D'Eau Claire]

The resistance readings may vary widely depending upon the polarity of the
leads attached and the individual DMM used, especially when there's a
transistor or diode junction somewhere in the circuit. 

Also, most DMMs read "INFINITE" whenever the value exceeds its maximum
range. That can be a few megohms for some DMMs and many megohms for others,
so it's not possible to know when the builder will see "2.6 megohms" or
"INFINITY" or, equally disturbing to some builders, "OVER RANGE" which
simply means the meter can't measure it.

At the other extreme are typical permissible variations in the accuracy of
DMMs and in the tolerance of the components in the circuit that affect
readings. 

Those things also conspire to make it virtually impossible to try to
establish "typical" resistance values in a great many situations. Besides,
just what is "typical", within 10%, 50%...? 

So values are chosen that, if the circuit is correct, the vast majority of
DMMs display measurements that agree with those shown in the manual. Some
will be closer to the limits given than others by orders of magnitude, but
as long as the reading agrees with the manual you're okay.

If you have a reading that simply "feels" close, try reversing your test
leads and see what happens or, if you have one, try a different DMM. 

Ron AC7AC