W7K Special Event Page - Redefinition of the Kelvin


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Station Details

W7K celebrates the redefinition of the SI unit kelvin which will take place on May 20, 2019. This station will be operated from one of the most accurate temperature standards laboratories in the world in American Fork, Utah. Times of operation will be 00:00Z to 23:59Z.

The station will operate on both HF and VHF.

For HF, operation will be on the 20, 40 and 80 meter bands. It will operate close to the following frequencies. Respect will be paid to established nets operating on adjacent frequencies. The times given are guidelines and will not be followed strictly.

TimeBandFreq (MHz)Mode
h:00 to h:2080 m3973.15LSB
h:20 to h:4040 m7273.15LSB
h:40 to h:6020 m14273.15USB

The Utah Valley Amateur Radio Club has given permission to take periodic contacts on their repeaters (K7UVA). These time slots will be at three-hour intervals close to the following times: 01:30Z, 04:30Z, 07:30Z, 10:30Z, 13:30Z, 16:30Z, 19:30Z, 22:30Z. In addition, Echolink contacts will be possible. There are also linked 1 ΒΌ m and 70 cm frequencies.

Repater K7UVA, 146.78 MHz (Offset -0.6 MHz, Tone 100.0), Mode: FM, Echolink 762028

Redefinition of the Kelvin

On 20 May 2019, the definition of the kelvin will be redefined. Historically, it has been defined as the triple-point of water being equal to 273.16 K. Starting May 20, the kelvin will be defined by assigning an exact numerical value to the Boltzmann constant. This redefinition will ensure a long-term stability and traceability of the unit for temperature by making it independent of any material substance.

QSL Cards

TBD - more to come



created by:

Frank Liebmann - K1LOK