A Super-power Transmitter

Radio Record, Volume IV, Issue 36, 20 March 1931, Page 19

A Super-power Transmitter

American Experiments BROADCASTING power of 1200 kw. is the goal of station KDKA, whose engineers are now conducting experiments with the new 200 kw. valves in the expectation of transmitting’ shortly a series of after-midnight tests with super power. Station KDKA’s experimental license from the Federal Radio Commission authorises -the use of up to,400 k.w. in the series of experiments. . This will require the use of two of the giant 200 kw. valves, each of which stands six feet high and requires the passage of five tons of cool water through its jacket every hour. The engineers are arranging the plant of KDKA so that six of the giant valves: may ultimately be used,, which would give the station an output. of 1200 k.w.