IC02AT.8 The ICOM 02-AT 2 meter handheld will go into the 150 MHz range with some modification. On the ICOM 02-AT, as well as on the ICOM -4-AT for VHF and/or UHF work, both units require semi-major diode surgery for frequency expansion. For VHF, two diodes are removed and three are added for the ICOM 02-AT to extend all the way up to 165 MHz. For UHF work, two diodes are added to extend the range of the ICOM 04-AT. The modification is tricky, and a bit complicated. On the brand new ICOM 735, to unlock the transmitter, you simply cut diodes D33 and D34 that are standing on end near the microprocessor section toward the rear top of the radio. On the IC-745, locate the RF board on the side of the radio and cut the light brown wire at jack 7, which is going to pin 1. Your transmitter is now unlocked. On the IC-751, locate the RF board on the side of the radio and cut the black wire going to pin 1 of jack 2. Your transmitter is now unlocked. CONTINUED IN FILE IC02AT.7