2 June : Radiotelegraph and cable channels rearranged to cater for heavy traffic during the coronation of Queen Elizabeth II . Two additional phototelegram channels opened.
32.
Beginning in 1905, demonstration radiotelegraph stations, using spark transmitters and electrolytic detectors, were installed for evaluation by the U . S . Navy.
33.
Consequently, radiotelegraph operators cannot hear interruptions from remote receiving stations during normal signal transmission periods when the full transmitter power is applied to the antenna.
34.
While the Federal Communications Commission no longer requires Morse code for amateur radio licenses, the old requirements were similar to the requirements for commercial radiotelegraph licenses.
35.
These were allocated worldwide, while the 10-meter band ( 28 MHz ) was created by the Washington International Radiotelegraph Conference on 25 November 1927.
36.
Depending upon the Engineering set up, radiotelegraph stations may use either a single antenna for both transmit and receive or, separate transmit and receive antennas.
37.
In cooperation with the NPS, volunteers have restored and maintain a historic coastal radiotelegraph marine station, KSM ( ex-KPH ), at Point Reyes.
38.
For commercial radiotelegraph licenses in the United States, the Federal Communications Commission specifies tests for Morse code proficiency in words per minute and in code groups per minute.
39.
A difference between amateur radio licenses and commercial radiotelegraph licenses is that commercial operators must be able to receive code groups of random characters along with plain language text.
40.
Notes for response to radiotelegraph Q-codes : Responses to a radiotelegraph Q-code query or a Q-code assertion may vary depending upon the code.
