[ARC5] BC sets and others.

[Geoff]

With 10 kc "channels" in place since before 1940 there hasnt been 20 kc in 
over 70 years.

Carl




----- Original Message ----- 
From: "Rob Atkinson" <ranchorobbo at gmail.com>
To: "Robert Eleazer" <releazer at earthlink.net>
Cc: "ARC-5 List" <arc5 at mailman.qth.net>
Sent: Tuesday, January 21, 2014 7:55 PM
Subject: Re: [ARC5] BC sets and others.


> >
>> Yes, in general, it seems that automobile radios of any era are head and 
>> shoulders above the rest of the crowd. Making even a decent AM BCB radio 
>> seems > to be a lost art and making a really good one is almost unheard 
>> of.
>
> Over the past 20 to 30 years the passband has gradually been narrowed
> to compensate for the increasingly high noise level on the band due to
> a combination of power line problems, adjacent channel QRM, and
> unfiltered comsumer appliances.  The days of the 20 kc passband AM
> broadcast rx are long gone.   Some of this is being addressed in
> comments to the FCC in the recently closed comment period for the AM
> Revitalization NPRM.
>
> 73
>
> Rob
> K5UJ
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