* The White-Clip to the Radio's Screw Antenna Terminal
or Whip Antenna

* The Black-Clip to the Radio's Screw Ground Terminal
or the Chassis Ground.

My DE1105 radio has no antenna jack. When connecting the white clip of
the DE31 to the telescopic antenna of the DE1105, reception is improved
a bit, but only if the DE31 tuner is off. When turning on the DE31
tuner, reception degrades.

Where can I connect the black clip? I tried it on one of the battery
minus poles with some aluminium foil but it didn't help.