Modifications for the ICOM - RogerK

The Q and not Q outputs on this IC control theCTCSS enable line. To disable the CTCSS encoderat power up or system reset pins 12 and 13 on IC8must be exchanged.Procedure1. Remove the control board from the chassis.2. Cut the trace going from R20 to pins 9 and 12 on IC8.3. Cut the trace going from J2 to pin 13 on IC8.4. Add a jumper wire from the land cut on R20 to pin 13 on IC8.5. Add a jumper wire from the cut trace on J2 to pins 9 and 12 of IC8.6. Reinstall the control PCB back in the chassis.OperationAfter this modification is made A125 will turn the CTCSS on and A126 will turn the CTCSS off.This modification is read 278 times.top of page03-02-2000(IC-T2) Expand TX/RX frequencyNotice: We can not guarantee specification when expand frequency.Expand Transmit frequency.●Remove the "D18 diode on Main unit.After modification. The IC-T2 display frequency indicate between 100 MHz to 200 MHz, but it is only display. We can notguarantee PLL working range at out of HAM Band.Date: 21-12-2001 User comment From: KC1RWSubject: Extra info