John Plimmer,

I would agree for the Shortwave Listener (SWL) who does
not want to get in to a lot of extra boxes in the Shack and
the resulting confusion of : ? Which Knob To Turn Next ?

The simple Matching Transformer between the Antenna
and the Coax Cable feed-n-line is the single best item
to add to the External Antenna to Coax to Radio System;
except for a good earthen Grounding Point.

NOTE - It is Interesting that you identify the use of
the 9:1 Matching Transformer for the lower reaches
of the spectrum AM/MW Band Tropic Bands and
such and the use of a 4:1 Matching Transformer
for above 10 MHz.

Question - Which respect to which type and size of
Antenna or Antennas do you make this statement ?

i want to know - iane ~ RHF