Topband: Impedance of inv l?

F Z_Bruce k1fz at
Sun Nov 18 10:55:47 EST 2018

That sounds about right. As you put a good ground system under it, that value will come down, and the efficiency will come up.

Many add extra antenna wire that pushes the current up the wire, this also raises  the impedance, hopefully to near 50 ohms with the right length.
A capacitor (variable, then fixed) in series at the feed point can cancel the added inductance.


On Sun, 18 Nov 2018 10:41:36 -0500, WW3S wrote:

What should the Z be for a 1/4 wave inv l, with the radials attached to a radial plate? Mine seems to be 60 ohms or so....

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