Re: Binaural CW Filter?


 

 
 
Dave,
Some time ago I did purchase the Hi-Per-Mite CW filters.
I never got around to building them since the NE SCAF filters came out.
Then I got hit with COPD and I remember the chip being in foam and wrapped in foil.
I did get to use my friends Hi-Per-Mite and that little kit really worked great.
I'm cleaning up here and amazed what I have and forgot about.
My WIN 7 went out and I just got this WIN 10 Laptop so I'm trying to get the pdf part to open for me.
Any new kits coming down the line??
BOB AF2DX
 
 

In a message dated 11/1/2016 11:35:57 P.M. Eastern Daylight Time, 4sqrp@... writes:
Some years ago Rick Campbell wrote an excellent article for QST describing a 'Binaural Receiver' http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/QS03-99-Campbell.pdf.
The basic concept is that you use a quadrature mixer for the final IF converter, and the two outputs are fed to left and right headphone channels

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