[Lowfer] 137KHz NPRM

[John Andrews]

Craig,

Unless something has changed in the last couple of years, frequency/location info is only available to power industry and government folk. Security of info is a big deal for UTC, probably due to the hardware shortcomings that you correctly pointed out. 

John, W1TAG



On Nov 27, 2012, at 12:42 PM, craig wasson <craig at wasson.com> wrote:

> Do you know what frequency the PLC near your transmitter was using?
> From what I've read power companies use specific frequencies in the
> 24-500KHz range so what we need to find out is which ones use the
> 137KHz range.
> 
> UTC maintains a database of what frequencies are being used where.  I
> checked into getting a copy of that database but I'm not sure they
> would give it to just an interested person.  You can request a copy
> here:
> 
> http://www.utc.org/plc-request-copy-electronic-file
> 
> It would be helpful to maybe publish a list of where power companies
> are using the spectrum around the proposed ham band, not to mention
> 73khz, 160-190khz and around 470-500khz if that list is allowed to be
> made public.
> 
> From what I read there are numerous newer technologies that are more
> immune to interference, although we all know that old systems are slow
> to be replaced.  But if they use a system so frail that a beacon
> transmitter can shut down the power grid they should be worried about
> hackers or terrorists using this weakness to disrupt things more than
> they worry about hams.
> 
> 
> Craig - N6IO
> 
> 
> 
> 
> On 11/27/12, K2ORS <k2ors at verizon.net> wrote:
>> Hello the list,
>>      The ARRL will be filing comments on the FCCs proposed amateur
>> allocation at 137kHz.
>> In the FCCs notice  they are proposing a 1W EIRP limit and possible
>> ADDITIONAL restrictions to protect PLC systems.
>> http://www.arrl.org/news/fcc-seeks-to-assign-entire-amateur-portion-of-160-meter-band-to-primary-status-to-amateur-radio-serv
>> http://transition.fcc.gov/Daily_Releases/Daily_Business/2012/db1119/FCC-12-140A1.pdf
>> 
>> It has been my experience with WD2XGJ running up to 4W ERP (6.5W EIRP) 900'
>> 
>> away from a power line with an active PLC that there is problem.
>> Further Bob W2ZM has run WE2XEB with up to 10W ERP (16W EIRP) with no
>> problem.
>> 
>> I spoke to Dan Henderson N1ND at HQ - he is interested in our comments, but
>> 
>> to be timely they need to be submitted before the Execuive Committee
>> conference call Thursday evening.
>> You can send comments to Dan at n1nd at arrl.org or send them to me and I'll
>> incorporate them into my comments.
>> I will put my comments up on my web site and send out a link to this list
>> before sending to ARRL.
>> 
>> Tnx & 73 Warren K2ORS
>> 
>> 
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