Hi, I've tested some combination of D48 to D55. I have found some interesting things ...
D52 : If present, you change your IC-718 into a IC-78.
D50 : If not present, the 160 meters band is reduced.
D54 : Full band TX (1.6 to 30 or 33 MHz (depend on D55).
D55 : if not present, extend range from 30 up to 33 MHz.
Some combinations :
equivalent to #06 if:
D48 ON
D49 OFF
D50 ON
D51 OFF
D52 OFF
D53 ON
D54 ON
D55 ON
equivalent to #04 if:
D48 ON
D49 OFF
D50 ON
D51 ON
D52 OFF
D53 ON
D54 ON
D55 ON
equivalent to #03 if:
D48 ON
D49 OFF
D50 OFF
D51 OFF
D52 OFF
D53 ON
D54 ON
D55 ON
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