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TUCoPS :: Radio :: ft2700r4.txt

Yaesu FT-2700RH mods




ft2700rh.4
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Note #1:



  Cut orange wire coming out from plug.

  Solder two wires to orange wire coming from CNTL unit, one each to points

  marked [X] on the diagram above.

  Solder orange wire from plug, pin 3, to ground for dim display light,

  or leave unconnected for bright display light.





Note #2:

  Pins #4 and #5 of U1 are No Connection





Note #3:

   Both modules are built separately, and encapsulated to prevent shorts

   Module "A" is located on top of PA module on VHF board

   Module "B" is tucked behind CNTL panel in front of radio.



Components:

   R1: 2.2K             C1: 0.1 UFD             K1 & K2: reed relays,

   R2: 3.2K             C2: 10 UFD                       12V @ 1050 ohms

   R3: 47K              VR1: 35K pot                     RS #275-233

   R4: 15K              D1: 1N914 diode         U1: NE555

   Q1: 2N3638A or equivalent




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