As a follow up, found some excellent research on some balun testing for
just the use I mentioned, really good stuff:
http://www.dxing.info/equipment/impe...er_bryant2.doc

John

"John Smith" wrote in message
...
I have a Grundig YB-500 (Yacht Boy 500) shortwave portable. I
frequently take it to remote locations with me and have enjoyed the
radio for years. It has a short pull up whip antenna, all I have done
in the past is to slingshot a long wire into a tree and use a clip lead
to attach it to the pull-up whip (no external ant connections on the
radio).

I was wondering what the impedance the collapsed whip would present, and
what sort or a balun/auto-transformer could be used between a longwire
(or other ant), gnd and the pull-up whip to improve reception...

.... anyone ever done any experimenting or unique ideas?

Warmest regards,
John C. Smith

--
Watching the cutting edge of yesterday replay--in virtual reality, right
before my eyes--in real time!
Thirty year old technology--wasn't it amazing?