Intercomparison of thermal converters at NIM, NIST, PTB, SIRI, and VSL from 10 to 100 MHz

Coaxial thermal voltage converters were compared among NIM, NIST, PTB, SIRI, and VSL in the frequency range from 10 MHz to 100 MHz. The comparisons were made from 1988 through 1990. The highly varied methods and underlying principles on which RF-DC difference determinations are based in each laboratory, the transport standards used, and the results of the comparisons are described. The results from the participating laboratories are in very good agreement; therefore, the authors believe that the determinations of RF-DC difference in this frequency range are very well established.<
>