Re: LF: Rogowski-coils for RF measurements

[Warren Ziegler <wd2xgj@gmail.com>]

Stefan,

   See John Andrew's web page :

http://www.w1tag.com/RFA.htm

73 Warren

On Mon, Oct 22, 2018 at 9:20 AM DK7FC <selberdenken@posteo.de> wrote:

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

--

73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1