Is it possible to measure RF voltages with a multimeter? I have a multimeter which can measure AC voltages up to 600V RMS, but I'm not sure because I don't know if it assumes the signal to be 50Hz, or at least not several MHz.
I'd like to know the RMS value of the voltage on my antenna. When measured with my multimeter, it shows it's beyond 600V~ RMS. When I measure just before my last inductors I have about 350V~ RMS.
I have a scope which goes up to 400V peak-to-peak on the screen (I'm not sure about its maximum ratings), but I'm reluctant to try, because I'm not sure if the measurements of my multimeter are correct, and I wouldn't like to damage my scope.
So: is it likely that a simple, common multimeter can measure RF voltages? I've seen this circuit which suggests that it's not possible and you have to put something in between the RF and the multimeter:
However, they're rectifying the RF voltage, so they in fact measure with the DC input. My multimeter has an AC input - it's unclear to me if a circuit as this one is still needed in that case.