Journal of Radio Electrician Henry "Harry" Tegler.
Radio Electrician 3rd class Henry "Harry" Tegler trained at the U.S. Naval Wireless Telephone School, at New London, Connecticut. Tegler entered the subchaser fleet fresh from training, and continued learning on the job, on subchaser SC 125.
Tegler's radio school journal contains many hand-drawn wiring diagrams, several of which are shown in this set.
The Power Panel: