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Text File  |  1990-09-02  |  2KB  |  32 lines
  1. IC2GAT.3
  2.  
  3. OUT-OF-BAND TRANSMIT MOD FOR ICOM IC-2GAT HANDHELD 2M TRANSCEIVER
  4. (copied from packet radio; origin unknown:)
  5. Back side of display board:
  6.  _____________________________________
  7. |                          D505        \
  8. |          D507  D504      ___          \
  9. |           ___   ___     |___|          \             |
  10. |          |___| |___|                    \        --  + --
  11. |   D506                    Q506           |           |
  12. |    _o_------               _o_           |       hole for
  13. |   |___|     |             |___|          |       on/off-vol
  14. |    o o      |              o o           |       control
  15. |             |                |           |__________________
  16. |              -----|<---------                              |
  17. |          add diode: 1N914 or equiv.                        |
  18. |                                                            |
  19. Connect diode between top lead of D506 and lower right lead of
  20. Q506 as shown.
  21. Notes: D506 may be absent.  If not, remove it.
  22.        Reset CPU if needed.
  23. ---
  24. A friend did this and his IC-2GAT can now transmit 138 to 178 MHz (no
  25. RF power output measurements were made).  He did no retuning, and did
  26. not have to reset the CPU.  He used a tiny axial-lead glass diode,
  27. replaced its leads with wire-wrap wire, and encased it in shrink-tube.
  28. The operation requires a super-tiny soldering iron.  Observe CMOS
  29. soldering precautions: Unplug the iron and ground the tip before
  30. touching the circuit.
  31. Remember: Except for MARS and CAP, it is illegal to transmit outside
  32. the ham bands with non-type-approved equipment.