10 kw 16068 kc crystal controlled transmitter as in new high frequency room - June 1929
New high frequency room (ex- station battery room) showing six station-built high frequency transmitters. Wiring trenches and spaces on left are reserved for TAL and TAG transmitters - June 1929
500 watt A C W high frequency transmitter - June 1929
Naval radio operators on duty in the receiving hut of the Navy's trans-Pacific high power station at Cavite, Philippine Islands
from 1922 Radio Broadcast magazine thanks to Google