Hi Alan,
Thanks for your thoughts.
On 2011 Nov 8, at 22:39, Alan Melia wrote:
> Hi Walter we were too, but it was a "European" thing: :-)) the EBU defined a
> 9kHz grid. with no thought of history. of usage.
I seem to recall that both MF and LF stations had been at 9 kHz spacing long
before that. The change was to shift the frequencies to integer multiples of 9
kHz. The reason (if I remember aright) was to facilitate receivers with digital
oscillators, though I forget the details.
At the same time there was a suggestion of 8 kHz spacing to allow more stations
(given that you would hardly call MF or LF music quality anyway). There was too
much opposition to that.
I'm not sure it was a European thing - I think these frequencies are agreed
worldwide.
As for a sense of history, I imagine the feasibility of affordable radios
mattered more than having to adjust the tuning dial a little. I'm not sure the
exact frequency is of as much cultural importance as, say, Britain going over
to decimal currency.
73,
Chris G4OKW
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