Icom IC-27H (IC 27 H IC27H) transceiver mods reviews software and diagrams

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Icom IC-27H (IC 27 H IC27H)

IC-27H

Programming interface schematics for Icom:
Programming software for Icom IC-27H (IC 27 H IC27H) :
PDF User Manual for Icom IC-27H (IC 27 H IC27H) :
PDF Service Manual with schematics for Icom IC-27H (IC 27 H IC27H) :

Mods for Icom IC-27H (IC 27 H IC27H) :
    Icom IC-27H (IC 27 H IC27H) Frequency expansion
    Icom IC-27H (IC 27 H IC27H) mic-connector mods
    Icom IC-27H (IC 27 H IC27H) 2M transceiver for use with the 9k6

Icom IC-27H (IC 27 H IC27H) technical specifications : Icom IC-27H (IC 27 H IC27H) technical specifications

Icom IC-27H (IC 27 H IC27H) Frequency expansion

Open top of transceiver and locate a set of diodes mounted between IC6 and front of the rig. There are 5 rows to place diodes in a matrix.

Top row (closest to IC 6) has 3 places for diodes while other rows has 4 places.

Add a diode (1N4148 etc) in the 2nd row at the 3rd place from left, to expand frequency between 144 – 149.9875 MHz.

Don’t forget to reset rig after mod. Otherwise it might behave a little odd. ;-)

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