Ekki, After thinking a tad more, do you mean 4 bytes for the frequency instead of 5? That would make sense. Dave - KI4KQ On May 15, 2008, at 1:33 AM, Ekki Plicht (DF4OR) wrote: > Electrically yes. The IC-731/735 was the only radio to use 4 data > bytes > instead of 5 as todays Icom use