[ARC5] AM BCB Frequencies

[Brian Clarke]

In Australia and New Zealand that I know of, BCB channel allocations are 9 kHz apart. Maximum allowed modulation bandwidth is 4.5 kHz. All digitally-tuned BCB radios can handle these channel separations.
For many years, I taught and assessed candidates for the Broadcast Operators Certificate of Proficiency at the Technical and Further Education (TAFE) college in Sydney, NSW, Australia.

73 de Brian, VK2GCE

-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of releazer at earthlink.net
Sent: Wednesday, 16 February 2022 12:14 AM
To: arc5 at ix.netcom.com; arc5 at mailman.qth.net
Subject: [ARC5] AM BCB Frequencies

"In April 1925, the band was further expanded to 550-1500 khz, providing 15 additional Class A frequencies. In June 1926, however, the Attorney General issued an opinion that the Commerce Department, under the 1912 act, had no power to regulate frequencies of stations, and a number of stations moved to frequencies which they wished to use, regardless of interference to other stations, even taking split channels (frequencies that were not exact multiples of 10 khz). In 1927 the Congress enacted a new Radio Act, creating the Federal Radio Commission, and gave it power to make frequency assignments."
 
So the 10 KHZ channel spacing was established Very Early, first by policy and then by Law.  Modern digital AM BCB receivers cannot even tune tighter than 10 KHZ.  
 
Wayne
WB5WSV
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