The message
from "Mike" contains these words:

fine with a 6 inch ferrite rod aerial instead of a 300 meter long
metre
dipole.


sorry, one of the ones that annoys me unreasonably


Both are correct spellings. 'Meter' is the preferred use on the continent
even when used in English language documents.

Only in American english. A meter is an instrument in English, not a
measurement of length.

--
Roger