With a leading zero if needed to be non-ambiguous. ie: 01810 is required to get 160M where 18100 is 17M. 3610 is fine (80M), because the K2 won't do 36100 (8M) as is 7115 (40M), because the K2 won't do 71150 (4M). Dan / WG4S / K2 #2456 <snip> Then you type in a frequency that you want on the number buttons on the left and "Voila!" you're there (as long as the K2 can tune that frequency).</snip>