Visit our newest sister site!
Hundreds of free aircraft flight manuals
Civilian • Historical • Military • Declassified • FREE!


TUCoPS :: Radio :: ic24at10.txt

Mod for Icom 24at




IC24AT.10

I received the following mods for 24AT out-of-band from a very reliable
source (although they don't specify RX only or RX/TX), for 75-195 MHz,
200-490 MHz, and 740-960 MHz.  Rumor has it (unconfirmed) that the unit
even switches to AM in the air band!

        1.  Remove diode D8  [see figure below]

        2.  Attach diode D7 [I believe this is already equipped]

        3.  Attach diode D12

        4.  Remove diode D13

        5.  Simultaneously hold "LIGHT", "B", and "#" keys and turn the
            power on.  Release all keys after the display goes out (checks
            all LCD segments).  [This is supposed to enable the
            out-of-band frequencies above]

        6.  Simultaneously hold "LIGHT" and "2" keys and turn the
            power on.  This enables the 10 MHz frequency digit entry.

        7.  Simultaneously hold "LIGHT" and "3" keys and turn the
            power on.  This enables the 100 MHz frequency digit entry.

              __________________
              |                |
              |                |
              |                |
              |      CPU       |
              |                |
              |                |
              |                |
              |________________|

                                  o     o  o      D7 lower left pin is
                                [D7]    [D8]         anode of one diode,
                                o  o      o          lower right is cathode
                                                     of the other.  Top pin
                                        o  o         is common
                                        [D12]
                                          o       D12 upper pins are cath-
                                                      odes of diodes, lower
                                                      is common anode.

                            __I_     __I_             See text
                            |  |     |  |
                       D13  |__|     |  | D?
                            |/\|     |  |
                            |  |     |  |
                            |__|     |__|
                              I        I

WARNING: I have NOT tried the hardware mods and cannot vouch for them, so
proceed at your own risk!
CONTINUED IN IC24AT.11



TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2014 AOH