[TowerTalk] Vertical dipoles

[Dennis OConnor]

Kelly, let me make a suggestion here...
For feeding this shortened vertical (OCF) at the junction of the hat and the vertical wire I would suggest a link coupled arrangement... Even though the feed point is not balanced, it is high impedence, and a link with a parallel tuned tank with a series tuned link coil wound over the tank coil will do two things simultaneously; transform impedance / neutralize reactance and at the same be a high impedance choke for common mode currents on the coax...
To put the icing on the cake, go down the coax 1/8 WL and add a solenoid coil of coax, and the shack should be stone cold for RF...
Depending on the band the LC values will vary... Give me a PM - only IF you actually intend to do this - and I will take the time to calculate some LC values for you...

denny / k8do