Hi Stefan,

the 40 meter band is from 7.0MHz (= 42.86m) to 7.2 (= 41.67m). The 'error' is 7,2% at the lower band end and 4.2% at the upper band end.

For 20m it is about the same: the band is 14.00-14.35MHz while 20m = 15MHz.

In fact, on HF there are only 2 bands where the wavelength is is named after is within the band (160m and 80m).

If we call 472-479kHz (= 635,6m - 626.3m) the 600m band the 'error' is 5.9% at the lower band end and 4.4% at the upper band end.

So for me there is no problem in going for a round number, as we do for most other bands.

73, Rik  ON7YD - OR7T