The older models were 10 meter only,(factory) 11 meter mod was very easy to do and would make the radio transmit 26.000 to 32.000 mhz
The newer models are 10/12 meter (factory) ..I
am not sure what the 11 meter mod will open up.I did hear that when the duel band radios were opened up they had a tendency to want to drift a bit.I dont know if that was ever overcome or not.
But reguardless,you have a nice little radio I had one for a long time,and would like to get another one someday when I have the $ to spend