ICOM IC-900 Out of Band Modifications --------------------------------------------------------------------- BAND OPERATING FREQ MATRIX CIRCUIT LOCATION CONDITION ---- -------------- ----------------------- --------- 28 Mhz 28 - 40 Mhz Remove D33 (3-B) RX Only Remove D33 (3-B) & TX/RX Install Diode at 3-A --------------------------------------------------------------------- 50 Mhz 40 - 54 Mhz Remove D32 (4-B) RX Only Remove D32 (4-B) & TX/RX Install Diode at 4-A --------------------------------------------------------------------- 144 Mhz 138 - 174 Mhz Remove D27 (1-D) RX Only Remove D27 (1-D) & TX/RX Install Diode at 1-C --------------------------------------------------------------------- 220 Mhz 216 - 236 Mhz Remove D26 (2-D) RX Only Remove D26 (2-D) & TX/RX Install Diode at 2-C --------------------------------------------------------------------- 440 Mhz 420 - 470 Mhz Remove D25 (3-B) RX Only Remove D25 (3-B) & TX/RX Install Diode at 3-C --------------------------------------------------------------------- 1200 Mhz ------------- -------------------- ------- --------------------------------------------------------------------- Diodes are 1SS-211 or any high quality silicon signal diode Matrix is located at display-B of EX-601 remote controller. D36 D32 D28 D24 D20 D16 D12 D8 4 D37 D33 D29 D25 D21 D17 D13 D9 3 D38 D34 D30 D26 D22 D18 D14 D10 2 D39 D35 D31 D27 D23 D19 D15 D11 1 A B C D E F G H RELAYED BY...N0KGX...GENE