Topband: small rx loops and ferrite

[Mike Waters]

Speaking of ferrite RX loops...

I picked up the July 2012 issue of Popular Communications from the local
grocery store's magazine rack, just to see what the unusual antenna on the
front cover was all about. It's called a "ferrite sleeve loop", and is made
from a bunch of ferrite rods arranged into a cylinder with many turns of
wire --connected to a variable capacitor--  wrapped around the center of
it. You hold your little portable AM radio next to it to pick up signals
from Uranus, supposedly. ;-)

A photo is at http://www.popular-communications.com/pc_current_issue.html(for
now).

And a video of this thingy is at bit.ly/Ifhpiy .

Anybody ever see anything like this? What's the advantage (if any)?

And can you imagine what all those ferrite rods cost?!

73, Mike
www.w0btu.com