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Yaesu FT- 2700RH mods
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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
Downloaded From P-80 International Information Systems 304-744-2253
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