I just had another brainstorm idea of how to use the MFJ-259B to find the resonant frequency of a trap. Cut a 1/4WL stub to exactly the trap target frequency. The MFJ-259B manual tells how to do that.
Connect the trap to the open end of the stub and tune the MFJ-259B for the minimum impedance. When the minimum purely resistive impedance frequency is equal to the target frequency for the trap, the trap is tuned to the target frequency.
Of course, this requires a 1/4WL stub per trap.
73, Cecil, www.w5dxp.com
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