| Disclaimer: Performing this mod will allow an Icom 735 to
transmit outside of the Amateur bands. Perform this mod at your own
risk. We performed this mod on our Icom 735 and it worked for us.
However, your experience may vary. Personal Database Applications,
Inc. is not responsible for any rules violations or damage to your
radio that may result. Click on the images below to view
full-size.
Begin by removing the top cover and the PA unit. There are some
wires toward the front panel that need to be unplugged to
remove the PA unit. This will expose the main board of the rig. On
ours, the wires had different connectors so that there is no
possibility of plugging them into the wrong places. Yours may vary,
so verify this before re-assembly.
You will need to cut two diodes located in the area
circled in red. For future reference, note the location of the
lithium coin battery used for the rig's memories circled in blue.
Next, cut diodes D33 and D34 (circled in red).
Note that jumper J22 is used to set the CI/V baud
rate and transceive.
Re-assemble the rig, verify that everything is working correctly,
and go make some some QSOs on 60 meters!
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