FT2700 freq coverage ==================== To dismantle the rig follow the instructions for the fitting of the speech module except for the front panel. This should be pivoted upwards on the upper pair of countersunk side screws, this will separate the front panel away from the wiring harness. Unscrew and lay back the small switch panel and this will reveal the control unit PCB on which the two VLSICs (Q4001 and Q4002) are located. UHF Options Just below the lefthand chip (Q4002 - HD44750FM) there are 3 diode positions D4103-D4105. These are marked BJU0 BJU1 BJU2 on the circuit diagram but only the two diodes D4103-D4104 are fitted. By using all 3 positions, eight options are available. MODE DIODE CALL2MHz SHIFTMHz STEPKHz BANDMHz D401- 5 4 3 0 0 0 0 UHF INHIBIT 1 0 0 1 435.0 +/-5 25/12.5 440-450 2 0 1 0 435.0 +/-5 25/12.5 430-450 3 0 1 1 433.4 +/-1.6 25/12.5 430-440 4 1 0 0 433.4 +/-7.6 25/12.5 430-440 5 1 0 1 435.0 +/-5 25-12.5 430-440 6 1 1 0 433.0 +/-5 20-10 430-440 7 1 1 1 433.0 +/-5 10/5 430-450 VHF options Just below and underneath the two ICs (Q4001 Q4002) are the fitting holes for D4009, D4010, D4011 and D4012 and again only two are fitted (D4009, D4012). These are marked BSV0 BSV1 BSV2 and BSV3 on the circuit diagram. Sixteen options are available. MODE DIODE CALL2MHz SHIFT STEP BAND D40- +/-600KHZ KHZ MHZ 12 11 10 9 0 0 0 0 0 VHF INHIBIT 1 0 0 0 1 151.6 N 0 0 2 0 0 1 0 151.6 N 0 0 3 0 0 1 1 151.6 N 0 0 4 0 1 0 0 151.6 N 0 0 5 0 1 0 1 145.0 Y 10/5 144-146 6 0 1 1 0 147.0 Y 10/5 144-154 7 0 1 1 1 147.0 Y 10/5 144-148 8 1 0 0 0 147.0 Y 10/5 140-150 9 1 0 0 1 145.0 Y 25/12.5 144-146 10 1 0 1 0 147.0 Y 25/12.5 144-148 11 1 0 1 1 147.0 Y 25/12.5 140-150 12 1 1 0 0 147.0 Y 25/12.5 144-154 13 1 1 0 1 145.0 Y 20/10 144-154 14 1 1 1 0 145.0 Y 20/10 144-146 15 1 1 1 1 145.0 Y 20/10 144-154 Info from Kris G8AUU 73 Julian G6LOH (Downloaded from GB7SYP)