TM231x01.txt Out of band transmit for the TM-231. TM231x02.txt Fix for low mike output. TM231x03.txt Simple MARS/CAP mod for the TM-231. TM231x04.txt Mod to allow transmit from 136 to 173 Mhz. TM231x05.txt Open the TM-231A for transmit on all receive frequencies. TM231x06.txt MARS/CAP mod for the TM-231. TM231x07.txt Kenwood TM-231 to TAPR 2 type TNC connection.