To find the hourly median income from the weekly income, you can divide the weekly income by the number of hours worked in a week. If we assume a 40-hour work week:
\[ \text{Hourly median income} = \frac{\text{Weekly income}}{\text{Hours per week}} \]
Given the weekly income of $819:
\[ \text{Hourly median income} = \frac{819}{40} = 20.475 \]
So, the hourly median income for a male with a high school diploma but no college is approximately $20.48.