Re: LF: VLF - vertical probe measurements

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hello Chris,

I would expect a sqare law relationship as well since the probe is a capacitive divider and thus the voltage should be directly proportional to the antennas voltage. And this rises with sqrt(2) x the power...


73, Stefan


Am 15.04.2011 14:40, schrieb Chris Osborn:

LF,

 

Acting on advice I have installed a whip aerial (probe) on top of a mast at the boundary of my property.

This is in order to monitor my VLF transmissions and to provide a reference level for any system improvements.

 

I noticed that the probe's pick-up voltage is directly proportional to my PA's supply current.

Assuming that the PA efficiency doesn't change drastically with current then would I be correct in assuming that the probe's voltage is directly proportional to the radiated power?

 

I was expecting a square law relationship . .

 

73

Chris G3XIZ