LF: RE: Field Strength Meter - advice needed

[Chris Trayner <C.Trayner@leeds.ac.uk>]

Hi Chris,


You've probably thought of these, but just in case:

> I have made a decent Helmholtz coil which gives a stable magnetic field yet 
> the
field strength meter's output voltage is very dependent on temperature and can 
vary up to
30 %.

Is the Helmholtz coil getting a constant voltage from the sig gen, or whatever 
powers it? That's not temp-sensitive, is it?

If you're attenuating the sig gen signal a lot to feed a weak signal to the 
Helmholtz coil, is the attenuator the problem?

Is there any other, unintended signal coupling (e.g. capacitive) from your 
source of test signal to the field strength meter?

Is there any other source of RF you can test it on, e.g. re-tune it to some 
broadcast signal?


73,
Chris G4OKW