Here is Something 'Old' that is Radio Related on eBay

Stoddard AT-205/URM6 Loop Antenna
with Compass and SO-239 Connector
{-: Looks Like It Is Built to Mil Spec :-}
* http://cgi.ebay.com/_W0QQitemZ220199446066
* Looks to be about a Foot in Diameter {Small}
* Appears to Weigh about 10 Pounds {Heavy}

-attn- Terry / SWLer,
This piece of RFI / EMI / EMC Gear may interest you
in your un-ending pursuit of Low-Noise & No-Noise. )
-History- "The AT-205/URM-6 Loop Sensor described in
http://www.solar-emc.com/pdf/CatalogComplete.pdf
Test Method RE01 of MIL-STD-462 is one of the Antennas
designed for use with the Navy AN/URM-6B and Stoddart
NM-10A Receivers. These were the Low Frequency EMI
Meters that, in 1948, initiated the emphasis on EMI by
the military departments and created the Technical Discipline
we now know as Electromagnetic Compatibility."

For Everyone Else - This is impressive enough to . . .
have setting around your Radio Shack as a 'gee golly'
"Conversation Piece" ) P-} ;]

NOTICE - BE ADVISED : This is NOT my eBay Auction
and I am NOT Associated with the eBay Seller.