This view shows the transmitter operator's position at the General Electric station in Oakland.  It's dated January 8, 1924, which was the date of KGO's inaugural broadcast.  From this position, the operator monitored the audio modulation level during every broadcast. At left is the main power control panel, which connects with the generators in the generator room. In the rear of the room are sections of the main 7,500 watt transmitter. 

Here is a slightly different view of the KGO transmitter room.   The cabinet to the right is a dummy antenna. 

This view of the transmitter room is probably from about 1927.  A newer GE-built transmitter has replaced the original one. Notice the open construction of all equipment, especially the transmitting tubes mounted on the wood frame in the center. The GE UV-207 tubes are water cooled, as evidenced by the tubing coils beneath them. Also notice the panel of light bulbs atop the center cabinet, which is apparently a rudimentary dummy antenna.