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820H mods here





                               ICOM IC-820H
                   EXTENDED RECEIVE/TRANSMIT MODIFICATION
                   --------------------------------------

         This modification is to open the IC-820H for extended receive
    (and transmit) operation.  This is a two (four) step modification
    which will open the IC-820H to the following frequencies:

    VHF Band    136 - 174 MHz
    UHF Band    420 - 460 MHz

    These frequencies are not guaranteed for accuracy or sensitivity.

    1.  Remove Diode D25 on logic board for VHF RX Expansion.
    2.  Remove Diode D26 on logic board for UHF RX Expansion.

    3.  Remove Diode D27 on logic board for VHF TX Expansion. *
    4.  Remove Diode D28 on logic board for UHF TX Expansion. *

    * RX modification must be done before the TX modification will work. *




73 de Andrea IT9GSV@amsat.org
http://www.qsl.net/it9gsv

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