Hi all......
I have a ground mounted 40 ft vertical wth an extensive buried radial system
that I have been using with good success on 40 thru 10 meters and have been
feeding it with 50 ohm coax to a 4 to 1 voltage balun at the base of the
antenna.
I recently tried feeding the antenna with 450 ohm twin lead and a Johnson
Matchbox with the twin lead parallel to the ground at about 6 inches
elevation.
I am pretty gratified to find the Matchbox will do a fine job of balancing
and matching on 80 thru 10 meters.

Anyone else try this?

I haven't tried feeding an unbalanced antenna with balanced line before,
unless there is a balun at the feedpoint of the antenna...have always
thought balanced line will only feed a balanced antenna....the exception
being an end fed zepp, or a 30 ft vertical with one 30 ft counterpose.