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Old July 10th 06, 12:46 AM posted to rec.radio.amateur.antenna
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Default E-field probe question

Thanks for the additional comments,
Richard. The probe seems remarkable in
being able to utilize a 10 megohm DMM to
measure an RF field given that a DMM
would not work at all to measure a
static electric field.

Static field measurements are almost
always done with extremely high input
resistance electrometers, fieldmeters,
and field mills. All of these usually
incorporate voltage follower op amps or
something similar to keep the input
resistance above 10 exp(13) ohms.
Hooking up a DMM would quickly discharge
any electrodes in the field.

Thanks again.

Chuck

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