[Boatanchors] Voltage Calibration with 1000 ohm/volt vs 20000ohm/volt me...

[J. Forster]

A VOM is good for little more than two digits. If you measure 245 volts, it'll
likely  be within +/- 2.5 volts. A tube tester's voltages are not at all
critical. In WW II, 1% resistors were almost never used. Circuits were designed
to use wide tolerance parts.

-John



Gerry Steffens wrote:

> I previously used the calculation described but found that the precision was
> lacking.  Calibrating a tube tester to read actual mutual conductance in
> micro-mhos was not reliable.  I periodically have access to an old
> calibrated (from a .0001% standard) impedance bridge for checking.
>
> Gerry
>
> Collecting & Restoring since 1959
> Gerald Steffens P.E.
> Oronoco, MN