> Shouldn't I find a zero reactance (resonance) point somewhere?
> Tuning my MFJ unit, from 1.7 to 4.0 mhz does not find a resonant
> condition anywhere. I can get close to zero, 10 uH, but no longer
> zero. Any ideas what's going on?
An open shield connection or water in the cable can cause
reactance to appear over a wide frequency range.
Additional problems are dc or low frequency AC getting into the
meter input, or the unit is out of calibration.
On more recent 259's you can check for external AC or DC signals
by going to the "frequency counter mode" and looking at the SWR
meter. If you have any deflection you have external signals. You
can check calibration using non-inductive resistors.
73, Tom W8JI
W8JI@contesting.com
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