[BC] Interesting IBUZ article & WTW

[Robert Meuser]

There is no broadcast spectrum on those channels in Region 2.  I think 
since a new band would require new receivers, it should be all digital. 
Face it, there is not a lot that can be done with these frequencies. 
Witness the additional Ham shortwave bands authorized in recent years. 
If there were big money pounding down the door for that space I am sure 
it would not have been given away. Broadcast is ideally suited for such 
channels as they are otherwise vacated, especially since it could be 
sold at auction.

R


Glen Kippel wrote:

> Quite right -- I cannot use my GPS anywhere near our transmitter site 
> due to
> the RF pollution from numerous sources.  But I was talking about the 
> NDB's
> (Non-Directional Beacons) operating below 500 kHz, not LORAN-C which 
> is 90 -
> 110 kHz.  My preference would be to use analog in the present 
> broadcasting
> spectrum of 150- 280 kHz, and digital (preferably DRM) in the area above
> that.  Anyway, VOR is still in use as a fallback to GPS.
>
> On 3/24/07, Robert Meuser <Robertm at broadcast.net> wrote:
>
>>
>>
>> A few comments. GPS may well have noise problems. I know that my
>> handheld unit will not work in Manhattan unless I am right by the river
>> on the harbor. I always thought it was building reflections but noise
>> and attenuation might be the real issue.
>>
>> De commissioning NDBs and possibly using them as broadcast frequencies
>> would have no impact on the Loran issue since we would be discussing
>> frequencies 150 kHz to 500 kHz.  I think it would make great sense to
>> build receivers capable of digital reception from 150 kHz to 3.5
>> megahertz or even to 27 megahertz.. Stations could be added based on
>> available white space as other services are de-commissioned. Since
>> virtually all users of the lower part of that spectrum have fixed
>> facilities, it would be easy to keep both the existing and new service
>> protected. To facilitate tuning, the radio would learn where the digital
>> channels are located and skip the spaces in between. This is how some
>> DRM receivers already operate.
>>
>> R
>>
>> Jonathan E. Hardis wrote:
>>
>> >> I am not sure whether the LED traffic lights generatie noise because
>> >> they
>> >> are LED, or because they are switched with triacs instead of 
>> relays.  I
>> >> would think that the former would be more reliable.  Anyway, yes, I
>> >> would
>> >> support your proposal, and even have some high-power AM stations 
>> on the
>> >> long-wave band.  Fewer people navigate by the NDB's there, preferring
>> >> to use
>> >> GPS or even VORTAC, and those old longwave beacons are being closed
>> >> down all
>> >> the time.
>> >
>> >
>> > Actually, FYI, you have it backwards.  GPS signals are highly
>> > vulnerable to interference, sometimes with severe consequences. Since
>> > we're becoming more and more dependent on GPS, the longwave system,
>> > LORAN at 100 kHz, is gaining new credibility to act as a backup.  See:
>> >
>> http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2007_register&docid=fr08ja07-82.pdf 
>>
>> > and the web references therein.
>> >
>> >   - Jonathan
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