[TenTec] skywave BPL interference

Tue May 4 22:37:37 EDT 2004

   Obviously one can't ID a BPL signal nor DF it accurately if it is skywave, so those parts of the report will be blank or rough
data.

   The point is to document and record reception of interference that may be skywave propagated BPL.  Since a BPL system is on all
the time, the skywave-propagated interference should appear pretty regularly.  Once a few have identified some likely candidates in
terms of frequency, emission characteristics, and time of propagation, then one can start to do a DF hunt to see if it is coming
from one of the known BPL test sites... and compare the recorded interference with what might be heard close up.

   A small number of well-documented cases of skywave propagation of a BPL signal might be enough.

-- Eric

-----Original Message-----
From: Dave Kamp, KW0D [mailto:kw0d at netexpress.net]
Sent: 2004 May 4 22:11
To: eric at k3na.org; tentec at contesting.com
Subject: RE: [TenTec] skywave BPL interference

Eric-

That's a good concept, but there's one problem;

The signal that's causing the interferance is not required to present a
callsign, much less have a liscense... unless you're willing to RDF it to
it's source, how do you locate it?  Furthermore, how do you classify it's
class of emmission?

For dealing with these issues, I have two recievers- one set up to WWV, the
other set to the frequency in question... and both go to AUX inputs (one to
Right, one to Left channel) on my computer.  When someone asks me for a
critical report, I simply record their transmission, snap a short
digital-movie of my reciever, and send the file in MP3 format, as well as a
copy of the AVI file...

DK  :-)

At 05:41 PM 05/04/2004 -0400, you wrote:
>Hi Pete --
>
>   If you experienced this kind of racket, why not file an interference
report?
>
>   A systematic effort to identify skywave interference from BPL systems
could be helpful.  We know where some of these trial
>systems are located, and what they generally sound like.  So let's see if
we can hear them... and report it when we do.
>
>   At one point ARRL had an "ARRL Monitoring Service" that would receive
reports such as intruder reports, help gather a complete
>set of data, and then report the problem to the FCC Enforcement Bureau,
Spectrum Enforcement Division.  I just did a search on the
>ARRL web site for information about this service and couldn't find anything.
>
>   A search of the FCC website failed to uncover an electronic way of
submitting interference reports.  Written reports may be sent
>to:
> Federal Communications Commission
> Enforcement Bureau
> Spectrum Enforcement Division
> 445 12th Street, SW
> Washington, DC 20554
>There is an email address fccham at fcc.gov and a phone number (717)
338-2502, but that seems oriented towards interference reports
>between amateur stations.  However, a phone call might be worthwhile to
verify what to submit, how, and to whom.
>
>   A report should contain information such as the following:
>Particulars Concerning the Station Causing the Interference:
>   A. Name or call sign.
>   B. Frequency measured
>   C. Class of emission
>   D. Bandwidth
>   E. Field strength
>   F. Nature of interference
>Particulars Concerning the Transmitting Station Interfered with:
>   G. Name or call sign and category of station
>   H. Frequency assigned
>   I. Frequency measured
>   J. Class of emission
>   K. Bandwidth
>   L. Field strength
>Particulars Furnished by the Receiving Station Experiencing the Interference:
>   M. Name of station
>   N. Geographic location of station; telephone and email contact
information.
>   O. Dates and times of occurrence of harmful interference
>Other particulars
>
>   Recordings of interference are encouraged and should be submitted on a
standard cassette.
>
>-- Eric K3NA
>
>-----Original Message-----
>From: tentec-bounces at contesting.com
>[mailto:tentec-bounces at contesting.com]On Behalf Of ac5e at comcast.net
>Sent: 2004 May 4 12:32
>To: tentec at contesting.com
>Subject: Re: [TenTec] ARRL's BPL NPRM response is out
>
>
>
>Well, I found some very wide range digital racket from around 14.3 up to
above 18.1 - beam heading 30 degrees east of north - while
>listening for CW DX on the 17m band. This stuff had a good bit of QSB but
when it was peaking at S5 it sounded very much like the
>BPL audio clips. So I am pretty sure skywave propagation of BPL is already
happening.
>
>Another point that does not get the attention it should - probably because
it's going to be hard to quantify - is interference to
>BPL from "intentional radiators" such as licensed Amateur and commercial
services. I get complaints of TVI when my local power
>company's service trucks are working in my neighborhood - and when the
police or fire department use their two ways within a block
>or two - and I do not see how the very cheap BPL modems are going to keep
from blocking from any moderately strong signal in the
>HF-VHF range.
>
>Even IF the utilities are willing to keep our frequencies clear that will
solve nothing if we cannot transmit without blocking our
>neighbors internet connections. I already know what happened when a
CB'er's illegal amp blocked a satellite dish's reception.
>Semiconductors ARE diodes, and diodes rectify. Whiteout! Followed by a
shootout.
>
>I don't want to have to answer my door wearing an armored vest with a
shotgun in my hand - or call the county sheriff whenever a
>stranger arrives in my driveway. And that's exactly what will happen if
the Jukes down the road think anything I own or operate
>might interfere with viewing the notorious Paris Hilton tape.
>
>73  Pete Allen  AC5E
>
>
>
>
>
>--
>Never squat with your spurs on
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>
>
>
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>
---------------------------------------------------------
73's from KW0D Dave in LeClaire, Iowa