TH78A.1 Mod 2 - MARS Remove D6. Reassemble. Reset the CPU by holding [M] and power on. Range on 2m is Rx 118.000 to 173.995, Tx 142.000 to 151.995 and on 70cm Rx 400.000 to 511.990, Tx 420.000 to 449.990. Mod 3 - Beyond MARS Remove D5. Reassemble. Reset the CPU by holding [M] and power on. This gives you a 300MHz band and a 800MHz band. No transmit is possible on these two new bands. To activate them press [F] for one second and press [BAND]. The 2m band will switch to 300MHZ and the 70cm band will switch to 800MHz. 300MHz Band Rx range: 300.000 to 399.990 800MHz Band Rx range: 800.000 to 949.990 Note: All ranges depend upon the setting of your step size. Not much difference one way or the other, just how close to the edge you can get. These mods are NOT FCC type-accepted. They are for experimental use only. Transmission in the MARS, CAP or any other non-amateur sub-band requires proper licensing. -Mike km6px@kg6xx.#nocal.ca.usa.na