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Text File  |  1991-02-22  |  2.3 KB  |  58 lines
  1. IC24AT.10
  2.  
  3. I received the following mods for 24AT out-of-band from a very reliable
  4. source (although they don't specify RX only or RX/TX), for 75-195 MHz,
  5. 200-490 MHz, and 740-960 MHz.  Rumor has it (unconfirmed) that the unit
  6. even switches to AM in the air band!
  7.  
  8.         1.  Remove diode D8  [see figure below]
  9.  
  10.         2.  Attach diode D7 [I believe this is already equipped]
  11.  
  12.         3.  Attach diode D12
  13.  
  14.         4.  Remove diode D13
  15.  
  16.         5.  Simultaneously hold "LIGHT", "B", and "#" keys and turn the
  17.             power on.  Release all keys after the display goes out (checks
  18.             all LCD segments).  [This is supposed to enable the
  19.             out-of-band frequencies above]
  20.  
  21.         6.  Simultaneously hold "LIGHT" and "2" keys and turn the
  22.             power on.  This enables the 10 MHz frequency digit entry.
  23.  
  24.         7.  Simultaneously hold "LIGHT" and "3" keys and turn the
  25.             power on.  This enables the 100 MHz frequency digit entry.
  26.  
  27.               __________________
  28.               |                |
  29.               |                |
  30.               |                |
  31.               |      CPU       |
  32.               |                |
  33.               |                |
  34.               |                |
  35.               |________________|
  36.  
  37.                                   o     o  o      D7 lower left pin is
  38.                                 [D7]    [D8]         anode of one diode,
  39.                                 o  o      o          lower right is cathode
  40.                                                      of the other.  Top pin
  41.                                         o  o         is common
  42.                                         [D12]
  43.                                           o       D12 upper pins are cath-
  44.                                                       odes of diodes, lower
  45.                                                       is common anode.
  46.  
  47.                             __I_     __I_             See text
  48.                             |  |     |  |
  49.                        D13  |__|     |  | D?
  50.                             |/\|     |  |
  51.                             |  |     |  |
  52.                             |__|     |__|
  53.                               I        I
  54.  
  55. WARNING: I have NOT tried the hardware mods and cannot vouch for them, so
  56. proceed at your own risk!
  57. CONTINUED IN IC24AT.11
  58.