I have a question concerning phased verticals and feed point impedance shifting. I understand that a single vertical will/can change impedance when mutually coupled with a second independently tuned vertical when combined/phased. My question is this, can the system reactance after mutual coupling be tuned out at the junction where the two phasing lines meet? Does the system then achieve resonance, or does the impedance matching need to be done at the feed point after the elements have been individually tuned?
I have two 1/4 wave ground plane mobile antennas. Tuned individually and then phased with half wave lines they shift impedance. 2:1 swr. What I've found is that I can then lengthen the elements slightly, and add 30uf of capacitance at the feed line junction. Swr goes from 2:1 to 1.2:1....
Is this system resonant?
It seems to be...
Phasing lines are 75ohm. Junction into MFJ 909, (I think that's the number of their capacitance box). Short 50 ohm run to transmitter. (2')
I have two 1/4 wave ground plane mobile antennas. Tuned individually and then phased with half wave lines they shift impedance. 2:1 swr. What I've found is that I can then lengthen the elements slightly, and add 30uf of capacitance at the feed line junction. Swr goes from 2:1 to 1.2:1....
Is this system resonant?
It seems to be...
Phasing lines are 75ohm. Junction into MFJ 909, (I think that's the number of their capacitance box). Short 50 ohm run to transmitter. (2')
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