Folks,

In researching some old timers in 1930's Callbooks, I notice that there
was quite a bit of turnover -- people licensed one year and gone the
next.

What was the licensing term (number of years) for ham radio licenses in
the 1930's? Back in the early 70's I remember that there were also
rules about staying active for so many hours per year, and then the
license term was 4 years. Any such conditions on 1930's renewals?

Thanks,

Rick W6NIR