wrote:

1) The DX-160 has an Antenna trim knob, so is a preselctor redundant?
2) The 9:1 matching impedance transformer is intriguing, but can they
be found/purchased already built?


Some food for thought...

http://web.telia.com/~u85920178/


Which has this in it. It's hard to find, but it's there.

http://web.telia.com/~u85920178/antennas/balun0.htm

mike