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IC-208H Extended RX-TX mod [message #42] Sun, 12 March 2006 17:33
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Registered: December 2004
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  • Place the radio with the front panel toward you and bottom side / speaker side UP.

  • Remove the (4) screws located in each corner.

  • CAREFUL! Go slow, you will need to disconnect the speaker cable while removing the cover.

    Look at the lower right hand corner of the main printed circuit board.

  • You should see a silver crystal with the number "D196D3C" printed on it.

  • Just above the crystal, you should see an (8x8) matrix pad (see below diagram).
    o o   o o   o o   o o
    o o   o o   o o   o o
    o o   o o   o o   o-o   <-- Remove
    o o   o o   o o   o-o   <-- Remove

    Note: there are ONLY (2) resistors in place. (Bottom right and the one directly above it).

  • REMOVE BOTH RESISTORS [Do NOT attempt this unless you know how to use a low wattage soldering iron]

  • RESET THE RADIO, hold the [SET LOCK] and [S.MW-MW] buttonsdown during power-up.

    DONE! New RX/TX Ranges

    118.0000  -  135.9875    RX-AM only
    136.0000  -  173.9875    RX & TX (15% RF power fall-off at lower freq, Full 
                             power at high freq)
    230.0000  -  399.9875    RX only
    400.0000  -  478.9875    RX & TX (Do NOT transmit below 410MHz on HI-PWR, 
                             VSWR fold-back)
    479.0000  -  549.9875    RX only
    810.0000  -  849.0000    RX only
    849.0000  -  869.0000    RX only
    894.0000  -  999.9875    RX only

    Author: KD4CWB
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