[AMRadio] Source Broadcast Xmtrs

[Charles Ring]

The FCC standard for broadcast AM has been 7.5KC and I doubt any 
commercial AM radios have ever gone beyond that. In recent decades the 
radios have become more and more narrow as AM has become deprecated by 
big business.. A few years ago Clear Channel ordered its AM stations to 
cut off audio at 5KC in order to clear space for digital "HD Radio" 
which has become a disaster itself, especially on AM. Suit and tie 
ignorance all the way.

73 de W3NU




On 6/11/2011 9:09 PM, W2XJ wrote:
> Commercial AM transmitters have a frequency response to 15 kilohertz
> there are a handful that have an audio response to 50 kilohertz. The new
> digital systems require at least a 30 kilohertz audio response.
>
> On 6/11/11 7:58 PM, Bob Macklin wrote:
>> Bandwidth for communications quality AM is +/- 3KC. Commercial AM broadcast
>> transmitters have more bandwidth than this. Close to +/- 5KC.
>>
>> Bob Macklin
>> K5MYJ
>> Seattle, Wa.
>> "Real Radios Glow In The Dark"
>> ----- Original Message -----
>> From: "Bernie Doran"<qedconsultants at embarqmail.com>
>> To:<ka4inm at tampabay.rr.com>; "Discussion of AM Radio in the Amateur
>> Service"<amradio at mailman.qth.net>
>> Sent: Saturday, June 11, 2011 4:48 PM
>> Subject: Re: [AMRadio] Source Broadcast Xmtrs
>