Re: [IRCA] Longwave Crate Loop update

[Rick Kunath <k9ao@xxxxxxxxxxx>]

satya@xxxxxxxxxxxx wrote:
> Doing some testing tonight, the Crate Loop continues to couple with the
> Sony 7600GR and various Ultralights better than the big 28x42 inch loop. 
> Must be the geometry or other factor – at any rate, anyone using a
> portable/Ultralight for LW might want to give it a look.

I take it that you are passively coupling the big loop to the radio by 
proximity?

I'm wondering whether yo have tried coupling the big loop into the 
radio's internal ferrite loopstick antenna? I've been doing this on a 
Sony 2010 for years. I

It's a simple matter to do. On a MW loop and depending on the loop size, 
you need 2 to 4 turns at the loop's center (the cold side). These feed 
to a piece of twin lead or lamp cord, then on to a short ferrite bar, 
maybe an inch or two in length. Wind turns around this, start with 10 to 
20. Experiment for best coupling. Move the little ferrite bar around 
until it is coupling the best into the built in ferrite.

Sony sells, or did, an antenna coupler like this for the 2010 in a 
little stand of the right height.

The method has worked well for me. Ideally, one might want to have the 
radio/external ferrite combo rotatable along with the loop (but at right 
angles) to allow for nulling, if you need to do that.

Rick Kunath

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