Re: Magnetic Loop Receiving Aerial (Gary Tempest)
Yep, Andy, that's a goniometer. They also get used in some colour TV test gear to vary subcarrier phase.
In the DF receiver, the static, orthogonal coils in the goniometer create a scale model in 2-dimensions of all the signals in the environment where the receiving loops are. the sense loop swung around inside the gonipmeter gives a standard 2-nulls pattern. It's equivalent to swinging a single loop around outside.
One of the benefits of having a loop is the ability to plant a null on your worst QM source.
It's worth making a goniometer. and this wayheloops inthe garden don't have to move.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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