One thing many Satellit 700 users don't know about is that the receiver
already has a tunable preselector. One of the worst things about the
Satellit 700 is the English language translation of the user's manual, which
does not mention or explain the preselector feature.

Tune to a specific frequency, preferrably one you know is not one of the
stronger signals you can catch at your location. Next, press the
stereo/mono button and hold it in. While holding that button in, rotate the
tuning knob. You notice the strength of the received signal getting
stronger or weaker as you trun that tuning knob. When you have peaked the
strength of the signal to its maximum, stop turning the knob and release the
stereo/mono button.
Also, make sure the DX/Local switch is in the DX position for best reception
of weaker signals.