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Date: Wed, 9 Nov 2011 09:28:33 +0000 (GMT)
From: Daniele Tincani <danieletincani@yahoo.com>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
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Subject: Re: LF: Re: BBC 198
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> I'm not sure it was a European thing - I think these frequencies are agre=
ed worldwide.=0A=0AAs far as I know,=A0MW BC stations in the Americas use 1=
0 kHz channels.=0A=A0=0ABest regards=0AD.=0A=0A=0A_________________________=
_______=0ADa: Chris Trayner <C.Trayner@leeds.ac.uk>=0AA: "rsgb_lf_group@bla=
cksheep.org" <rsgb_lf_group@blacksheep.org>=0AInviato: Mercoled=EC 9 Novemb=
re 2011 9:02=0AOggetto: Re: LF: Re: BBC 198=0A=0AHi Alan,=0A=0AThanks for y=
our thoughts.=0A=0AOn 2011 Nov 8, at 22:39, Alan Melia wrote:=0A=0A> Hi Wal=
ter we were too, but it was a "European" thing: :-)) the EBU defined a=0A> =
9kHz grid. with no thought of history. of usage.=0A=0AI seem to recall that=
 both MF and LF stations had been at 9 kHz spacing long before that. The ch=
ange was to shift the frequencies to integer multiples of 9 kHz. The reason=
 (if I remember aright) was to facilitate receivers with digital oscillator=
s, though I forget the details. =0A=0AAt the same time there was a suggesti=
on of 8 kHz spacing to allow more stations (given that you would hardly cal=
l MF or LF music quality anyway). There was too much opposition to that.=0A=
=0AI'm not sure it was a European thing - I think these frequencies are agr=
eed worldwide.=0A=0AAs for a sense of history, I imagine the feasibility of=
 affordable radios mattered more than having to adjust the tuning dial a li=
ttle. I'm not sure the exact frequency is of as much cultural importance as=
, say, Britain going over to decimal currency.=0A=0A73,=0AChris G4OKW
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ar=
ial, helvetica, sans-serif;font-size:10pt"><div><span>&gt; I'm not sure it =
was a European thing - I think these frequencies are agreed worldwide.<br><=
/span></div><div><span>As far as I know,&nbsp;MW BC stations in the America=
s use 10 kHz channels.</span></div><div><span></span>&nbsp;</div><div><span=
>Best regards</span></div><div><span>D.</span></div><div><br></div><div sty=
le=3D"font-family: arial, helvetica, sans-serif; font-size: 10pt;"><div sty=
le=3D"font-family: times new roman, new york, times, serif; font-size: 12pt=
;"><font size=3D"2" face=3D"Arial"><div style=3D"margin: 5px 0px; padding: =
0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; fon=
t-size: 0px;" class=3D"hr" contentEditable=3D"false" readonly=3D"true"></di=
v><b><span style=3D"font-weight: bold;">Da:</span></b> Chris Trayner &lt;C.=
Trayner@leeds.ac.uk&gt;<br><b><span style=3D"font-weight: bold;">A:</span><=
/b>
 "rsgb_lf_group@blacksheep.org" &lt;rsgb_lf_group@blacksheep.org&gt;<br><b>=
<span style=3D"font-weight: bold;">Inviato:</span></b> Mercoled=EC 9 Novemb=
re 2011 9:02<br><b><span style=3D"font-weight: bold;">Oggetto:</span></b> R=
e: LF: Re: BBC 198<br></font><br>Hi Alan,<br><br>Thanks for your thoughts.<=
br><br>On 2011 Nov 8, at 22:39, Alan Melia wrote:<br><br>&gt; Hi Walter we =
were too, but it was a "European" thing: :-)) the EBU defined a<br>&gt; 9kH=
z grid. with no thought of history. of usage.<br><br>I seem to recall that =
both MF and LF stations had been at 9 kHz spacing long before that. The cha=
nge 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. <br><br>At the same time there was a suggest=
ion of 8 kHz spacing to allow more stations (given that you would hardly ca=
ll MF or LF music quality anyway). There was too much opposition to
 that.<br><br>I'm not sure it was a European thing - I think these frequenc=
ies are agreed worldwide.<br><br>As for a sense of history, I imagine the f=
easibility of affordable radios mattered more than having to adjust the tun=
ing dial a little. I'm not sure the exact frequency is of as much cultural =
importance as, say, Britain going over to decimal currency.<br><br>73,<br>C=
hris G4OKW<br><br><br><br><br></div></div></div></body></html>
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