Topband: Pixel Technologies Magnetic RX Loop

[wb6rse1 at mac.com]

The Pixel Technologies PRO-1A Magnetic Receiving Loop was demonstrated at the Visalia DX Convention last month. It's about the same size as a circular or diamond shaped coax loop. It includes a preamp mounted at the feed point. The antenna has had several positive reviews on eHam.

http://www.pixelsatradio.com/PDF/RF_PRO-1A_Cut_sheet.pdf

Joe, W4TV, posted to the list earlier this year looking for references for the Pixel design. The technology is based on work done by Dr. Carl E. Baum in the mid '60s through the early '70s. A list of papers complied by Dr. Baum appears here:

http://www.ece.unm.edu/summa/notes/Sensor.html

Of particular interest regarding the Mobius design are: SSN notes 7, 25 and 127 including a discussion of multi-turn Mobius loops.

A coax loop has its shield split opposite the feed point but the center conductor is unbroken. Based upon the references above, the break opposite the feed point in the Mobius design is in both the shield and the center conductor with the shield of each side connected to the center conductor of the opposite side. 

If you've built your own Mobius receiving loop of tried the commercial product, a report of your experience would be of great interest to the Top Band list.

73 - Steve WB6RSE