I've been ham since 1969 and there has always been a issue with DQRM.
Mike N2MS
- Original Message -
From: Donald Chester k4...@hotmail.com
What does it say about the state of amateur radio to-day, that the term
DQRM has entered our jargon?
Yes, it has been with us a long time.
Mike Waters mikew...@gmail.com wrote:
You may have seen an old Wullenweber antenna array at one of those older
FCC sites. IIRC, one is (or was) on the east coast. AFAIK, the Wullenweber
is not used anymore by the FCC and is scheduled to be (or already has been)
replaced with a different
You/re right of course, it's 1 ft/nanosecond. Don't know what I was
thinking. I was also focusing on CW DQRM, since that is 99% of what I
operate, and since carriers and CW jamming havw been endemic on the
Navassa
dxpedition's top band and 80m operations. I agree that for SSB
interference,
You may have seen an old Wullenweber antenna array at one of those older
FCC sites. IIRC, one is (or was) on the east coast. AFAIK, the Wullenweber
is not used anymore by the FCC and is scheduled to be (or already has been)
replaced with a different --and far less complex-- antenna.
One thing the
-
From: Mike Waters mikew...@gmail.com
To: topband topband@contesting.com
Sent: Tue, 10 Feb 2015 18:04:17 - (UTC)
Subject: Re: Topband: K1N DQRM Tracking Project
You may have seen an old Wullenweber antenna array at one of those older
FCC sites. IIRC, one is (or was) on the east coast
with the commanding
Officer before coming out.
Chet N4FX
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
mstang...@comcast.net
Sent: Tuesday, February 10, 2015 1:38 PM
To: Mike Waters
Cc: topband
Subject: Re: Topband: K1N DQRM Tracking Project
:;
Subject: Re: Topband: K1N DQRM Tracking Project
I agree, Lee. Locating a DQRM station involves accurately time stamping the
arrival time of their transmissions, at (at least) three receivers at known
locations. Once the arrival times are known, one can use trigonometry to
calculate the location
To: 'Jim Garland'; 'Lee K7TJR'; Topband@contesting.com
Subject: RE: Topband: K1N DQRM Tracking Project
Actually ,Jim, the velocity of propagation of radio waves (or light
waves)
in free space is about 1 foot/nanosecond, NOT 1 foot per microsecond. It
would seem to me that one needs to have a measure
[mailto:topband-boun...@contesting.com] On Behalf Of Jim
Garland
Sent: Sunday, February 08, 2015 9:08 PM
To: 'Lee K7TJR'; Topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
I agree, Lee. Locating a DQRM station involves accurately time stamping the
arrival time of their transmissions
I think the fact that something positive is being done is working, even if it
is electrically futile it is definately putting some DQRM'ers off, the DQRM has
been noticeably less and with K1N ops and others reminding the offenders that
something is happening is a plus. The triangulation would
IIRC, quite some years ago, QST had a photo description of
a FCC signal locator (for lack of a better description) consisting
of several remote receivers that were linked together.
Anyway, these could instantly locate the origin of a
skywave signal with a resolution of a city block(!!) using
A couple of observations;
The DQRM with EP6T was by far the worst I have ever heard. My guess
is a lot of it was because of angry people who did not like Iran as
the DX location. If that is correct, I suspect the next P5 operation
will be as bad if this isn't corrected somewhat.
I am always
If anyone wants to look at the antennas, the exact addresses of all the FCC
HF DF sites are in this document:
transition.fcc.gov/omd/contracts/pre-award/RFQ1124.pdf
Type the address, city, and state of the FCC site you want to examine into
Google Maps and zoom in.
There is much more
A poster on the cluster said it the best:
DQRM triangulation = nonsense idea!
There is no way this is going to identify the offending station(s).
IMO at best a bluff.
Doug
-Original Message-
Is anyone using this DQRM Tracking Project report? They want reports of
deliberate QRM like
...@contesting.com] On Behalf Of
n0...@juno.com
Sent: Sunday, February 08, 2015 12:18 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
IIRC, quite some years ago, QST had a photo description of
a FCC signal locator (for lack of a better description) consisting
Amen!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Doug
Renwick
Sent: Sunday, February 08, 2015 2:34 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
A poster on the cluster said it the best:
DQRM
I didn't see the ARRL article, but I have researched this on the Web. Type
these words into Google:
fcc hf df
The first hit is a map of where they all are. Most are unmanned. They are
all linked to a single manned command center.
I'm not certain what type of antennas they use. I studied the
, Topband@contesting.com
Sent: Sun, 08 Feb 2015 19:49:28 - (UTC)
Subject: Re: Topband: K1N DQRM Tracking Project
I don't remember the article, Charlie, but that's a fabulous idea, and at
first blush it doesn't sound all that hard to implement. One way might be to
set up three receivers
I don't remember the article, Charlie, but that's a fabulous idea, and at
first blush it doesn't sound all that hard to implement. One way might be
to
set up three receivers at different locations, each with a 10 MHz GPS or
rubidium time base (both inexpensive and readily available.). For each
To put this in perspective, I have some familiarity
with surveillance systems used by government agencies
to search for sources of RF such as cell phones,
listening devices, etc in secure locations. It has
some analogies to the DQRM problem. Using relative
amplitude doesn't work very well to do
A friend of mine told me recently that he has had the electrical utility
company out several times to fix noise problems and without ever leaving his
house tells them exactly which pole is the culprit. Further, that they were
always happy to help because he has not been wrong yet.
OK, so how
Greetings top-band community,
Interestingly enough the technology exists right here in our own Ham
community that could go a long way toward finding these DQRM culprits.
There are some beam forming arrays that operate with SDR technology
where a recording can be made of a target bandwidth
[mailto:topband-boun...@contesting.com] On Behalf Of Peter
Voelpel
Sent: Sunday, February 08, 2015 9:12 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
Are you sure that will work with sky wave signals?
73
Peter
-Original Message-
From: Topband [mailto:topband-boun
deterrant for all but the most sociopathic offenders.
73,
'Jim
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Lee
K7TJR
Sent: Sunday, February 08, 2015 4:47 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
Are you sure that will work with sky wave signals?
73
Peter
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Lee K7TJR
Being able to actually replay an entire contest and do a strength and
directional analysis in a narrow bandwidth after the fact
with any accuracy across the pond or through the auroral oval.
Lee
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Peter
Voelpel
Sent: Sunday, February 08, 2015 6:12 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
Are you
the DX QRG to tune up!! :(
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Doug
Renwick
Sent: Saturday, February 07, 2015 6:05 PM
To: topband@contesting.com
Subject: Topband: K1N DQRM Tracking Project
Is anyone using this DQRM
Strength is useless unless he is a local.
We have been dealing with one for years, but he preferred to harass SSB ops
on 20. The FCC issued a $22,000 NAL last year. Maybe that will shut him up.
On Sat, Feb 7, 2015 at 11:58 PM, Tom W8JI w...@w8ji.com wrote:
It would be nice to set something
: K1N DQRM Tracking Project
Is anyone using this DQRM Tracking Project report? They want reports of
deliberate QRM like 'tuner uppers' and other types, but not QRMers like cops
or 'no splitters'. I don't know how accurate they can be to identify the
guilty station on any band especially 160m
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