I've dive my 1966 Calypso II last Saturday and my first impression diving this regulator are:
when I take a breath I feel a small resistance and the reg have a little whistle. Maybe I can fix this discomfort just adjusting the bushing piston? Maybe the whistle is normal for these reg but this is the first time I dive such regulator and I more use to dive with modern Calypso regulator and I don't have to compare? Anyone help?
