Topband: Wire antennas and antenna analyzers

[Tod]

> 
> By the way, the failure mode isn't always an abrupt total 
> failure of a diode. The result is often a change in diode 
> characteristics that ruins calibration.

Tom:

Is there anything on your web site that discusses how one could run a check
on the MFJ-259B and feel comfortable that their analyzer diodes are
functioning correctly? [preferably a simple check that requires modest
standards and equipment]

Tod, K0TO