Wwv Frequencies

National institute of standards and.

Wwv frequencies. Callers outside the local calling area are charged for the call at regular long distance rates. Callers are disconnected after 2 minutes. The wwv antennas are half wave vertical antennas that radiate omnidirectional patterns. Most minutes feature a 500 or 600 hz audio tone.

Wwv is operated by the u s. Both wwv and wwvh broadcast standard frequency audio tones that alternate during most minutes of the hour. These are not toll free numbers. Wwv is a shortwave also known as high frequency hf radio station located near fort collins colorado it is best known for its continuous time signal broadcasts begun in 1945 and is also used to establish official united states government frequency standards with transmitters operating on 2 5 5 10 15 and 20 mhz.

Choose a wwv frequency typically 10mhz that can be received with relatively good strength at your location and which is the same frequency as your standard typically 1 or 10mhz or a harmonic eg. The first pulse of each minute is an 800 ms pulse of 1000 hz at wwv and 1200 hz at wwvh. To hear these broadcasts dial 303 499 7111 for wwv colorado and 808 335 4363 for wwvh hawaii. 10mhz wwv will work for a 1 2 5 or 10mhz tune in wwv in am mode and note the s meter reading.

Each seconds pulse is preceded by 10 ms of silence and followed by 25 ms of silence. Wwv operates in the high frequency hf portion of the radio spectrum. However a 440 hz tone is broadcast once per hour and some minutes do not include any audio tones at all. There are antennas at.

The telephone service is very popular.