AM/MW Shortwave Radio Product News - Something New on eBay:

Looks like a {Copy} of a LF Engineering H-800 SkyMatch
LF/MF/HF Active Antenna -but- It is called a Penntek
AF50 High Performance Shortwave Active Antenna

http://cgi.ebay.com/_W0QQitemZ180248575240

Claims to be a "new pre-production engineering prototype
high performance broadband receive-only active antenna."

Pictures and More Info via the Link.