HELLO...THE MOD FOR EXTENDED COVERAGE ON THE TH26AT IS: LOOK FOR THE ''CONTROL BOARD'' FIRST FIND A BARE JUMPER WIRE AND DIODE D4 REMOVE THE JUMPER WIRE AND DIODE D4 TRANSMIT AND RECEIVE WILL BE FROM 136-174 MHZ. OF COURSE IM JUST PASSING THIS ON AND DO NOT TAKE RESPONSIBILITY FOR ITS ACCURACY GOOD LUCK AND 73...CHUCK