The Sender ADI-145 and ADI-450 radios are modifiable for TX and RX
 entirely thru the keyboard.  There is no hardware modifications
 required for the transmit.  Both radios, to my understanding, use the
 same key strokes for extending the TX and RX ranges.  After performing
 the keystroke mod on my ADI-145, I was able to increase the TX and
 RX range from 130.00 to 169.00 Mhz.  The ADI-450 range should extend
 from 430-470 Mhz using the same keyboard strokes.

1. Start by turning the radio on while holding the function key down.

2. Turn the radio off and while pressing the 3/STEP key on the keyboard,
   turn the radio back on, the display should now read 145.000 with a
   "m" in the lower left corner of the LCD display.

3. Hold the function key down and push the 3/STEP key, the display should
   read 10.  Turn the channel selector knob clockwise until the display
   read 05.

4. Hold the function key down and press number 9 on the keypad, the display
   should now read 00.60.

5. Using the keypad direct entry, enter 30.63, then turn the channel selector
   knob clockwise until the frequency reads 30.635.

6. Holding the function key down, press the 3/STEP key, the display should
   read 05.  Turn the channel selector knob so the display reads 10.

7. Holding the function key down, press the O/SET key on the keypad.

8. Now press number 7 on the keypad, the display should be blank.

9. Using the keypad direct entry, enter 30.63 and the press the PTT bar.
   The display should now read 130.00.  You Mod is now done.

10. To change your TX and RX widths, hold the function key down and press
    the O/SET key on the keypad.  Release, then press the number 7 key
    by itself.  The display should go blank (as in step #8).  Now using
    direct entry, enter your RX and TX limits directory from the keypad.
    For instance, if you were to input 40.69, your TX and RX would be
    in the range from 140.00-169.00.

Rickie Belitz,  KD4RKP