Modifications for the ICOM - RogerK

3. At the thumbwheel switch end of the FLEXIBLE BOARD, remove the jumper which connects C3 and COM.4. Reassemble the radio. Coverage is now 140-150 MHZ.(MARS/CAP)Now, if you activate the switch described above, the radio will now operate in the 150-160 MHZ range, after L3 adjustment,described below.This modification is read 1054 times.top of page19-07-1998(IC-2AT) Operation and L3 ADJUSTMENT1. Activate switch and dial up a known active frequency.2. Adjust L3 until PLL locks up and radio begins receiving.(you need an active frequency to tell when this happens)3. To return to 140-150 MHZ, repeat above steps with switch off.Notes and disclaimer1. Drill a hole in the case of the radio so that L3 can be adjusted from outside of the radio.2. The above information is presented for educational purposes only, and is not an endorsement of any particular practice.3. This MOD has been in operation for 6 years with no ill effects on the radio4. This MOD courtesy N2MOD.This modification is read 885 times.top of page19-07-1998(IC-2GAT) Out-of-band transmit mod for IC-2GAT handheld 2M transceiverBack side of display board:_____________________________________ID505I D507 D504 ___I ___ ___ I___I II I___I I___I -- + --I D506 Q506 . . I II _o_------ _o_ J I hole forI I___I I I___I . I on/off-volI o o I o o I controlI I I I__________________I -----K---------- II add diode: 1N914 or equiv. IIIConnect diode between top lead of D506 and lower right lead of Q506 as shown.A surface mount diode may be added right of Q506 at J. note that the .___. are the same trace, while above the J is the centerpole.o. Note that this diode is 1906-0336, "-" at bottom, both "+" at top.___|___^ ^| |. .Notes:D506 may be absent. If not, remove it.Reset CPU if needed.A friend did this and his IC-2GAT can now transmit 138 to 178 MHz (no RF power output measurements were made). He did noretuning, and did not have to reset the CPU. He used a tiny axial-lead glass diode, replaced its leads with wire-wrap wire, and