Is it easy to siphon power from a powered antenna?
you can get steal few milliamperes of the power that's going up the coax.
the power goes in at the bottom using a &quot;bias tee&quot;
but to extract power at mid-span you want one without the capacitor.
or you get one and bypass the capacitor.
A suitable inductor can be made by passing a wire through both holes of a UHF/VHF balun core.



simulate this circuit &ndash; Schematic created using CircuitLab