LF: Rogowski-coils for RF measurements

[DK7FC <selberdenken@posteo.de>]

Hi all,

Has someone ever build (homemade, not bought!) a Rogowski-coil for RF 
current measurements?
https://en.wikipedia.org/wiki/Rogowski_coil

It could be used to measure leakage currents in a tower near the antenna 
wire for example. Or for measuring RF currents into a pole of a guide 
rail, for example :-)
I'm planning to build one and i thought i use 0.4 mm diameter enameled 
cu wire arround a graden hose, having 0.6m circumference. Then some 
shrinking tube will be applied. That's the plan.
The circuit looks easy, it should be run from a 9V battery and a simple 
TL081 for example. The output could be adapted to a multimeter, so there 
is a digital read-out.
I'm curious to see how it works...


73, Stefan