In article .com,
"RHF" wrote:

Telamon,

From the description it appears to be simply 24 Feet
of a Single (1) Wire {Heavy Gauge} Speaker Wire
connected to an "F" Connector as the FLEX-TENNA
-by- Grove Enterprises
http://www.grove-ent.com/grovehvu.html

I think that one of those Roll-Up {Reel} Portable
Shortwave Antenna's would do about the same
as the Grove Flex-Tenna for Shortwave Listening.
http://www.shortwavestore.com/sws/pr...?productid=612
http://www.durhamradio.com/s/product...roductid=44948
http://www.amazon.com/gp/product/B00...v=glance&n=172
282
http://images.amazon.com/images/P/B0...CLZZZZZZZ_.gif
http://www.survivalunlimited.com/radios/antenna.htm
http://www.universal-radio.com/catal...able/3184b.jpg
http://www.ccrane.com/antennas/short...e-antenna.aspx

You could be right about it being just a single insulated wire but use
of the word cable usually means transferring a signal from one place to
another. Complete electrical paths require two wires at a minimum
because as any engineer knows for a circuit to be a complete path a loop
forms with one wire carrying current to the load and the other wire
carrying it back to the source according to basic circuit analysis.

The description states "No ground or radials are required." indicating
that the antenna is somehow balanced and not single element common mode.

Also a plural is used in this descriptive sentence "Its vinyl-protected
wire elements allow the Flex-Tenna" indicating more than one conductor
is used but maybe I read to much into the description.

--
Telamon
Ventura, California