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Old 11th Feb 2019, 6:03 pm   #21
GMB
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Join Date: Aug 2003
Location: near Reading (and sometimes Torquay)
Posts: 3,086
Default Re: Looking to build RF detector probe for low frequency

Do bear in mind that RF doesn't like to go through metal. People often forget this. The earth current will try to go as close as it can to the signal current.

So a connection on the side will flow round the outside and go in through the hole where the signal wire enters. It then will try to follow the signal wire as close as it can get. It is all about minimising the magnetic field that the loop creates.

So don't connect your earth jack miles away from the signal input!
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