Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx> Tesla list wrote:
Original poster: Ed Phillips <evp@xxxxxxxxxxx>It is common sense that air pressure, humididty, current, and time of day all affect air breakdown voltage, but: IS there any official way to determine exactly what air breakdown voltage is? ( such as KV/distance ) " Use spheres as terminals at both ends of the spark and use tables of spark distance vs voltage as a function of the radii of the spheres.These are usually for low frequencies or DC of course.
The 30 kV/cm figure for initial breakdown is valid for at least 300 MHz. (At least, this is what my "Reference Data for Radio Engineers" says.) Antonio Carlos M. de Queiroz