This works FB for me:

Connect another length of whatever feeder in parallel at the oupt terminals.
Experiment with length, short/open-end, reactance (parallel/series coil/cap)
any where along the new line - - right there in the shack.

73, Dave, N3HE

"Willy" wrote in message
.. .
Do you think that putting a 1:2 or 1:4 UNUN at the feedpoint of the KW
matchbox will extend the matching capability of this feedline tuner?
No feedline length changes are possible at this time!!!!!!!!!!!!