Mystery beacon on 505 kHz
A number of us are hearing an NDB-type signal identifying itself as NEED on 505 kHz. If anyone can get a bearing on this signal, it would help to determine where it is. Thanks.
Re: Mystery beacon on 505 kHz
Posted by Teapot on February 06, 2007 at 08:22:39.
In reply to Mystery beacon on 505 kHz posted by Fritz Raab W1FR on February 01, 2007
I'll try picking it up tonight. It's day as I am typing so I will try it later. Re: "NWNJ" Beacon Still Active
Posted by Teapot on February 06, 2007 at 08:44:59.
In reply to Re: posted by Teapot on January 26, 2007
Yep.....it's there.I can't hear any rythmic variations in amplitude like what Morse code sounds like to me but on my Winamp player's equalizer I saw little chamges in amplitude.In Morse code the amplitude goes from 0 to max but in interference.....
I'm not sure if that's the signal or not. Re: Mystery beacon on 505 kHz
Posted by John Davis on February 06, 2007 at 18:59:21.
In reply to Re: Mystery beacon on 505 kHz posted by Teapot on February 06, 2007
Members of the LWCA LowFER group report that it left the air last week.
This tends to support either of two theories: that it was a tactical military NDB, and it had served its purpose; or else that it was a conventional NDB that failed, switching to reverse keying and wandering off its normal frequency until the fault was discovered. Inverted keying is not unusual, though coming unlocked and drifting that far in frequency certainly is.
A plausible candidate for a failed transmitter is beacon JU, Jefferson, NC, which is normally on 410kHz. The "JU" ident, inverted, would form the Morse characters for "NEED," and at least two of the loop direction finder results are consistent with that location.
Some excerpts of DF attempts posted to the reflector:
Dale Parfitt wrote:
> Hard to get a deep null on skywave and the static crashes but looks like
> just north of east ( and just south of west) from my QTH WSW of
> Asheville NC 35.2 degrees N lat, 83.2 degrees W long.
Todd Roberts wrote:
>I set up the loop today and took a bearing on NDB NEED 505KHz at 5:45PM EST.
>It is coming in fairly well again here around local sunset time.
>The bearing I get is 225/45 degrees or almost exactly due SW/NE from my
>QTH at Hilton Head Island, SC.
And from another group, forwarded to ours: Unid. NDB and LOWFER Sta.
>Confirm NEED carrier on 505 khz direction is 155 degrees
>from New Bedford QTH 41 deg 44 min N ; 70 deg 53 min W
>Hoping it will peak and I can get ID.
>Mike WA1OMI
Posted by Dave Childs on February 06, 2007 at 22:41:42.
Has anyone besides me ever heard MET on about 336 KHz or does anyone know its location? I hear it regularly, day or night, in east-central MI yet I've never seen it listed in the LOWDOWN loggings. Using a loop ant. it appears to be SSE or NNW of here. I haven't found it in any NDB directories.
Also, I heard an apparent LOWFER station, XJ, last night on about 189.5 KHz; it also appears to originate SSE or NNW from here. Does anyone know the location for this one or the operator's address so I can send a QSL report? Thanks in advance.
Re: Unid. NDB and LOWFER Sta.
Posted by John Andrews, W1TAG on February 07, 2007 at 09:53:42.
In reply to Unid. NDB and LOWFER Sta. posted by Dave Childs on February 06, 2007
Dave,
I believe that XJ is run by WA8LXJ.
John Andrews, W1TAG beacon WMS
Posted by PAUL DAULTON on February 07, 2007 at 16:46:51.
I HAVE INSTALLED A NEW BEACON. CALL SIGN IS WMS SENT AT QRSS30.
FREQ IS APX 187492HZ. POWER IS ONE WATT INTO A 45FT ALUMINUM TOWER.
I ONLY HAVE FOUR GROUND RADIALS TOTALING ABOUT 450FT. MORE GROUNDS
WILL BE ADDED IN THE NEXT FEW DAYS.
I AM LOCATED NEAR JACKSONVILLE,AR ABOUT 14MILES NORTH OF LITTLE ROCK,AR
RRECEPTION REPORTS WILL BE APPRECIATED.
THANK YOU Re: beacon WMS
PAUL DAULTON K5WMS
PAUL DAULTON K5WMS
Posted by Webmaster on February 07, 2007 at 17:30:50.
In reply to beacon WMS posted by PAUL DAULTON on February 07, 2007
Congratulations, Paul. I have added your listing to our LowFER list and contact information at lwca.org/sitepage/part15. If you ever make changes in your hours, mode, frequency, e-mail address, etc., please post the information to this message board so we can promptly update the list with your changes.
If you don't mind a suggestion for your planned extra ground radials... it appears your first four are each somewhat longer than 100 feet. This is certainly OK, but that much length enters the region of diminishing returns, especially where additional radials are concerned. The general rule of thumb is that an electrically short vertical doesn't induce significant return currents in the earth at a distance greater than its own height (or slightly farther if there is a capacitive top hat). Therefore, if you are limited as to how much copper you can afford to put in or on the ground, it may be more efficient to expand the system with radials of 45 to 50 feet in length. They will complement nicely the ones you have already installed, and you'll be able to do more of them for a given amount of budget.
The closer you get to the base of the tower, in fact, the greater the return current density is in the soil; so, to minimize losses further, some operators bury or lay as many normal length radials as is practical for them, and then roll out lengths of chicken wire around the base and tie those in to the ground system as well.
Just some thoughts that I hope may help.
John
Re: beacon WMS
Posted by PAUL DAULTON on February 07, 2007 at 18:14:44.
In reply to Re: beacon WMS posted by Webmaster on February 07, 2007
JOHN THANKS FOR THE SUGGESTIONS ON GROUND RADIALS. I STARTED
WITH FOUR AT 90 DEGREE SEPARATION. MY TOWER IS IN THE BACK YARD WICH IS FREE OF TREES. I ROLLED THE WIRE OUT ON TOP OF
THE SOIL AND HELD IT DOWN WITH WIRE HOOKS( CHAIN LINK FENCE
TIES). I VISITED BILL BOWERS LAST SUMMER AND SAW A SIMILAR
INSTALATION ON HIS RADIALS. WHEN THE GRASS COMES OUT IT
COVERS THE RADIALS NICELY. I HAVE WELL OVER 1000FT OF WIRE
SO I CAN ADD MORE AND LOOK AT THE CHICKEN WIRE AS WELL. NOW
IS A GOOD TIME TO INSTALL THE CHICKEN WIRE BEFOR THE BERMUDA
GRASS STARTS WHICH IS A COUPLE OF MONTHS AWAY. I'M HOPING FOR AN OUT OF STATE REPORT THIS SEASON. SO FAAR THIS YEAR
ON THE PART 15 BAND I'VE COPIED IP, MO, AND WEB.
THANKS PAUL
Re: Mystery beacon on 505 kHz
Posted by Duncan Mc Arthur/GM3TNT on February 08, 2007 at 02:38:06.
In reply to Re: Mystery beacon on 505 kHz posted by John Davis on February 06, 2007
I heard a Swedish call sign think it was SM6BCH or something ..cant remember as I was in the car at the time it was on 505 and gave many dashes with no ident then suddenly gave the call-sign. This was about 0000gmt in my qth Scotland. Re: Mystery beacon on 505 kHz
Posted by John Andrews, W1TAG on February 08, 2007 at 05:26:28.
In reply to Re: Mystery beacon on 505 kHz posted by Duncan Mc Arthur/GM3TNT on February 08, 2007
Duncan,
That would be Bernt, SM6BHZ, who has a permit to transmit in that frequency range. His signal has been copied around Europe, but I'm not sure if it has made it across the pond. Reception reports for SM6BHZ can be sent to begu@algonet.se .
John Andrews, W1TAG Best LW Receiver?
Posted by Bill Marvin on February 08, 2007 at 14:00:14.
Hello Group
What is the best LW receiver? An old RCA RBC or something newer. I have a NRD 535Db and a scarce SP 600 JLX SW/Longwave receiver.
I would like opinions because what works best on BCB or SW/HF+ may not be optimum for LW.
Good Dx
Bill KB9IV Re: Best LW Receiver?
Posted by Alan G3NYK on February 08, 2007 at 14:43:08.
In reply to Best LW Receiver? posted by Bill Marvin on February 08, 2007
Hi Bill well one of the G stations active on 136kHz in the UK uses an NRD-535 and does very well with it. Whilst I don't know the receiver personally it seems a stable, and sensitive unit. He uses it for receiving QRSS transmissions where a 0.5Hz drift over 6 hours is quite noticable. I am not sure whether Gary G4WGT monitors this board but if he does he will probably give a first hand report. He did fit a narrow CW filter (either 500Hz or maybe 300Hz BW).
The old Super Pro is a venerable and good receiver but it may not be up to this stability level. It performs well for its age though (like all lowfers !!)
Cheers de Alan G3NYK Re: Best LW Receiver?
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23 on February 10, 2007 at 16:04:29.
In reply to Re: Best LW Receiver? posted by Alan G3NYK on February 08, 2007
Bill,
Alan is right on target about the receivers, but don't neglect the antenna! Don't expect great results from an HF antenna on LW! A G5RV or 80/160 meter dipole does not necessarily make a good LW antenna. Much better options include a K9AY loop, large frame loop (4 to 10 feet across), or an active type e-probe antenna-if you have an electrically quiet location. If you have unlimited room a beverage would be a good choice.
Get some good ideas from following websites:
K0LR
http://www.mlecmn.net/~lyle/
VE3OT's page:
http://technology.fanshawec.on.ca/tele354/k9ay.htm
W1VD
http://www.w1vd.com/k9ay11.pdf
W1TAG
http://www.w1tag.com/rxloop.htm
VE7SL
http://www.imagenisp.ca/jsm/
73 & GL!
Warren K2ORS
WD2XGJ (137 kHz)
WD2XSH/23 (505 kHz)
Re: Unid. NDB and LOWFER Sta.
Posted by Michael Oexner on February 11, 2007 at 06:17:05.
In reply to Unid. NDB and LOWFER Sta. posted by Dave Childs on February 06, 2007
Hi Dave,
Your MET-336 is actually MA-336 Cadillac/Wexor MI USA N44 14 14 W085 32 50 EN74FF; it just "sounds like" MET :-)
vy 73 + gd DX,
Michael
Editor of "The European NDB Handbook" & "The North American NDB Handbook"
cf. http://www.beaconworld.org.uk/files/NDBpublications2007.pdf
and http://lwca.org/miscdocs/NDBpublications2007.pdf
NDB changes #04/2007
Posted by Michael Oexner on February 11, 2007 at 08:26:08.
+ ---------------------+Hi all,
| |
| NDB changes #04/2007 |
| |
+----------------------+
Some NDB changes in North America. As always I'd appreciate your feedback whether you can confirm the changes "on the air".
[1] Deletions--Call kHz Station S/P ITU
PJ 329.0 Whitehorse/Robinson YT CAN
BEQ 368.0 Bessemer AL USA
HPL 375.0 Nucla/Hopkins CO USA
BD 388.0 Windsor Locks/Chupp CT USA
MC 290.0 Macon/Sofke GA USA
RRJ 368.0 French Lick/Oranj IN USA
MCX 377.0 Monticello/White County IN USAMRK 338.0 Rayville/Molly Ridge LA USA
BX 353.0 Bogalusa/Carma LA USA
FWV 379.0 Truxno/Farmerville LA USACQM 233.0 Cook MN USA
PMZ 221.0 Plymouth NC USA
RW 235.0 Wilson/Rocky Mount/Jambe NC USA
VW 280.0 Statesville/Temky NC USA
HI 306.0 Hatteras Inlet NC USA
EEJ 428.0 Sanford/Lee County NC USAHRA 204.0 Zanesville OH USA
PDR 233.0 Ottawa OH USA
RUV 326.0 Bellefontaine/Rushsylvania OH USA
CL 344.0 Cleveland/Harri OH USAFAU 246.0 Fairview OK USA
IBO 271.0 Idabel OK USADYL 237.0 Doylestown PA USA
AND 230.0 Anderson SC USA
LV 275.0 Dallas/Conis TX USA
GYB 385.0 Giddings/Lee County TX USACNQ 379.0 Roanoke/Callahan VA USA
CF 392.0 Chesterfield/Pubbs VA USA
[2] New NDBs or changes of frequency or callsignCall kHz Station ITU Lat Long
- none -
Michael
Editor of "The European NDB Handbook" & "The North American NDB Handbook" Re: NDB changes #04/2007
cf. http://www.beaconworld.org.uk/files/NDBpublications2007.pdf
and http://lwca.org/miscdocs/NDBpublications2007.pdf
Posted by Dave Childs on February 11, 2007 at 17:49:33.
In reply to NDB changes #04/2007 posted by Michael Oexner on February 11, 2007
Hi Michael, I can tell you about theree of your Ohio deletions & one from Michigan you didn't mention. I once heard all of these regularly from here but haven't heard any of these in months or longer.
PDR-233 Ottawa, OH
TCU-239 Tecumseh, MI
RUV-326 Rushylvania/Bellefontaine, OH
CL-344 Cleveland, OH
All of these are silent; RUV was replaced by EDJ-242, same location, although I haven't heard it [EDJ] in about 2 years either. 73s.
Re: NDB changes #04/2007
Posted by Dave Childs on February 11, 2007 at 17:55:05.
In reply to NDB changes #04/2007 posted by Michael Oexner on February 11, 2007
PS: thanks for the help with "MET". I never would've guessed that it was intended to be "MA"; there's a huge space between the dit & the dash. Re: Unid. NDB and LOWFER Sta.
Posted by Dave Childs on February 11, 2007 at 17:58:50.
In reply to Re: Unid. NDB and LOWFER Sta. posted by Michael Oexner on February 11, 2007
Thanks, John, Michael! 73s Re: NDB changes #04/2007
Posted by John Andrews on February 14, 2007 at 16:05:29.
In reply to NDB changes #04/2007 posted by Michael Oexner on February 11, 2007
Michael,
I looked for the two beacons closest to me in central MA, BD and DYL. Nothing was heard on either frequency during the day. In the evening, I can copy 388 kHz USB signals from NXX, RNW and UN, and nothing on the USB or LSB from 237 kHZ. So, BD and DYL may indeed be off the air.
John Andrews Danmarks Radio Kalundborg 243 kHz closes
Posted by Mike Terry on February 15, 2007 at 11:20:58.
DR Kalundborg 243 kHz went silent at 2304 UTC on February 14 2007, after the News at 2300. Carrier on frequency until 2315 UTC.
An 80-years era has ended!
(Ydun Ritz)
WIA applies for Medium Frequency band allocation
Posted by Mike Terry on February 17, 2007 at 05:13:00.
(Source: Wireless Institute of Australia
via www.southgatearc.org/news/february2007/wia_500khz.htm)
The Wireless Institute of Australia has applied to the ACMA for experimental access to a small band of frequencies near 500 kHz.
Amateur radio operators in the United States, Sweden and Germany have recently been granted experimental access to frequencies just above 500 kHz. Applications for access to this band have also been lodged by the NZART and the RSGB.
The WIA submission requests a temporary/experimental MF amateur allocation be made for the frequency range 505-515 kHz.
The WIA recognises that the former marine distress and calling frequency of 500 kHz remains so designated in the International Radio Regulations (guard band 495-505 kHz), and that this status will not be changed until WRC-11 at the earliest.
Australia's WIA also proposed that because of the technical challenges involved, the MF band be only made available to Advanced class amateur stations. It is also proposed that normal amateur output power limits be used.
Radio Problems
Posted by Teapot on February 18, 2007 at 18:13:39.
I have a little poratble shortwave radio and on Feb. 9 at around 5-6PM local time(2200-2300 UTC) my radio had problems:
I was listening to a local AM station in the lower end of the band having a good time and then...Crackle-Crackle Crackle-Crackle-Crac-Crackle.My radio was making crackling sounds.No other radio I had got this problem and my S-Meter was "bouncing" from full to zero.All the stations were affected.After that clicking sound stopped all the stationd in the AM broadcast band were weakened a lot.KDKA which lit up the S meter all the way now got 3 S-units or so.That next day I plugged in the wire antenna and all the stations were fine because the radio was using the wire antenna and NOT the internal ferrite-rod antenna.For me, that narrowed that down to something between the RF AMP to the ferrite rod antenna.What do you think it is?Have you had a similar problem before?I would really like a little input.
P.S.My wire antenna broke so no more AM on this radio or longwave ay all. :(
Re: Radio Problems
Posted by John Andrews on February 19, 2007 at 13:43:25.
In reply to Radio Problems posted by Teapot on February 18, 2007
Perhaps the antenna jack itself is the issue. If inserting a plug breaks a connection to the ferrite rod antenna, that connection may be intermittent. If you take the radio apart and poke around, you may find something mechanically intermittent. A small squirt of contact cleaner onto the jack's contact surfaces might clear the ussue. Beyond that, perhaps some searching on the net with the radio's manufacturer and model number will turn up some information. The usual posters at this site use communications receivers or selective level meters for LF reception, so this may not be your best resource.
John Andrews becon on 303 khz
Posted by Joe Kelly on February 19, 2007 at 15:01:38.
Greetings, on Feb. 17th, I flew on a flight from Dulles Airport in Northern Va. to Incheon Korea. We flew due north directley over Hudson Bay then onto the Arctic Ocean, turning left (West) maybe several hundred miles north of the coast of Canada and Alaska, flying all the way to the Siberian Pennisula. Somwhere over the Arctic at night time, I pulled out my Grundig G5, and found a very weak becon on 303Khz, had to kick in the SSB and narow filters and turn volume way up (using headphones). That was the only thing I heard, but thought it was a good one to report. Anyboday know what it was? I am very new to this. Thanks alot. Joe Kelly Re: beacon on 303 khz
Posted by Jay Flynn on February 20, 2007 at 17:07:33.
In reply to becon on 303 khz posted by Joe Kelly on February 19, 2007
Joe =
It's hard to positively ID what you heard without knowing what modulation you heard on the signal.
It could be you heard spurious radiation from a laptop computer or something in the aircraft.
However, if you were hearing something from the ground, most likely it was a Differential Global Positioning System (DGPS) beacon. They operate in the band from about 285 to 320 kHz. They are digital with no voice or Morse ID and are used to broadcast corrections to Global Positioning System (GPS) receivers in a 150 to 300 kilometer radius from the beacon.
The modulation sounds like a rapid shift in frequency up and down about 50 Hz. The data rate is 200 baud. You can tune through the band in your home town and probably pick up one and see if it has similar modulation.
Without knowing your exact flight route, I can only guess at which beacons you may have heard over Alaska, Canada and Russia.
According to the Trimble Navigation website, the likely candidates are:
Caraginsky, Russia: 301.5 kHz. 58N33 163E33
-or-
Biorka Island, Alaska: 305 kHz. 56N51 135W32
The frequencies are those for zero beat. To hear a tone you would have to be up or down from the frequency by about a kilohertz or so.
Hope this helps. If you have to make the flight again, try listening down at 153 kHz in the longwave band for Radio Rossii in Komsomlsk, Russia about two or three hours out of Korea.
73s, Jay Re: beacon on 303 khz
Posted by Joe Kelly on February 21, 2007 at 13:22:09.
In reply to Re: beacon on 303 khz posted by Jay Flynn on February 20, 2007
Thanks Jay for the follow up. My exact route was due north over Hudson bay and then over the western tip of Baffin Island. Then we few past Victoria Island. I think I heard the beacon somewhere between Victoria Island over the Beaufort Sea before crossing the longtitude where Inuvik is. I know this because I was following our route from inside the plane on the GPS map on the little screens they have in back of the headrest on the seat in front of my seat. After I Googled 303 klz, I found a company called: RFID SOLUTIONS. They specialize in the "Mantis Tag." A 303 mkz location device. I was thinking maybe a tagged Polar Bear, who knows, but it was not a lap top. The signal was so so faint on the SSB, narrow filter Almost could not detect it without the volume turned way up, but it was there repeating the same beat. Something like: do do do da. that is not the exact secquence but something like it, always repeating, just three or for notes. Anyway. It was alot of fun. Thanks Jay. Ofcom to allow limited operation on 501-504 kHz
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23 on February 21, 2007 at 14:42:36.
U.K. Amateurs will be able to apply for a special notice of variation to operate on 501-504 kHz with up to 100 milliwatts ERP. For details see:
http://www.ofcom.org.uk/radiocomms/ifi/licensing/classes/amateur/Notices/20070221
call signs
73 Warren K2ORS
WD2XGJ 137 kHz
WD2XSH/23 505 kHz
Posted by Bryan on February 21, 2007 at 16:48:40.
I'm interrested in Longwave Communication, and I've noticed the call signs in your listings. How does 1 get a call sign?, is it issued to you when you join this club, or do I make-up my own? 'cause I thought that it was a free band frequency area. Can you help me understand this question? 'cause I'm kinda stumbling around with questions like that. Re: call signs
Posted by Warren K2ORS/WD2XGJ/WD2XSH/23 on February 21, 2007 at 17:32:38.
In reply to call signs posted by Bryan on February 21, 2007
Bryan,
Callsigns are assigned by the FCC. For example, I have 3 callsigns K2ORS - ham callsign, WD2XGJ- FCC Experimental license for 137kHz and WD2XSH/23 - FCC Experimental callsign for 505 kHz.
You can operate with low power (1 watt) and a small antenna (15 meters long)on 160-190 kHz with NO license and pretty much pick your 'callsign' but its not official. There is a good description of this unlicensed "Part 15" operation on this website:
http://www.lwca.org/sitepage/part15/index.htm
Good Luck!
Warren
Data (?) signal on 148 khz.
Posted by Robert on February 23, 2007 at 12:05:38.
I would be very grateful if any UK reader could help me here. When re-calibrating the tuning on LW valve sets, I often use a signal right on the band edge to make sure the dial is reading what the radio is tuned to. Having done this several times now, it would be nice to know what I'm using! 'MP' via web reciever.
I assume it is a data signal. it consists of warbling pips repeated at one second intervals and is on continuously - it has never changed its format as far as I have noticed. Possibly a time signal? The digital read-out on my hifi places it at 148 KHZ, although I'm not so sure how accurate that is. If anyone could tell me what this signal is, and where it comes from, I would most grateful.
kind regards, Rob.
Posted by Robert on February 23, 2007 at 13:36:56.
Canadian station 'MP' seen via web based reciever,21:35 UTC. Argo software. Re: 'MP' via web reciever.
Screenshot here:
http://i148.photobucket.com/albums/s32/DdraigCymraeg/argo_3.gif
Posted by John Andrews, W1TAG on February 23, 2007 at 13:48:41.
In reply to 'MP' via web reciever. posted by Robert (U.K) on February 23, 2007
Robert,
The screen you posted is from the W3EEE site, and runs continuously. MP is usually on 24/7 during the winter months, and would be visible at W3EEE pretty much any time. That W3EEE screen will also show other North American experimental and Amateur signals that operate more intermittently. Contrary to your posting, the W3EEE site uses Spectrum Laboratory software for that screen.
John Andrews, W1TAG VINU 415 hz
Posted by Dennis Williard on February 24, 2007 at 04:24:40.
Does anyone know where this station is VIN with a long U on end near 415 hrz.
I am PA and others have heard it in Mich. I have heard it again this morning.
Re: VINU 415 hz
Posted by John Davis on February 24, 2007 at 08:46:34.
In reply to VINU 415 hz posted by Dennis Williard on February 24, 2007
What do you mean by a "long U" exactly?
Re: VINU 415 hz
Posted by John Andrews on February 24, 2007 at 17:24:24.
In reply to Re: VINU 415 hz posted by John Davis on February 24, 2007
I listened for it here, and found the keying on 416.007 kHz. It's negative keying of the carrier of BKL on 416 kHz in Cleveland, OH. A quick web search turns up a few earlier entries for "VINU" as BKL. Mystery solved.
John Andrews, W1TAG Re: VINU 415 hz
Posted by Dennis ka3bvj on February 25, 2007 at 04:58:56.
In reply to Re: VINU 415 hz posted by John Andrews on February 24, 2007
interesting why would BKL sound like VINU Re: VINU 415 hz
Posted by John Andrews on February 25, 2007 at 05:31:03.
In reply to Re: VINU 415 hz posted by Dennis ka3bvj on February 25, 2007
Dennis,
I'll give you a verbal explanation, and you can sketch it out yourself. The effect arises when the linear power amp in a beacon transmitter is over-driven, or when something goes wrong in the biasing of the amplifier. When the transmitter goes "key down" to send a Morse character, the carrier level actually drops. If you listen to the carrier with a CW receiver, you will hear the > to the normal keying. I.E., key-down becomes key-up, and vice versa. The long dash you heard as the end of the "U" was actually the long space between BKL ID's.
So, write out the code for BKL with a long space. Then above it, fill in the blank spaces between the code elements. Hint: the space you heard before the "V" was actually the dash in the "B". The first dot in the "V" is the space before the first dot in the "B".
Such things are not uncommon. Since most beacon DX-ers listen to the sidebands, rather than the carriers, sometimes these things go unnoticed for a while, especially with very narrow audio filters.
John Andrews, W1TAG Longwave audio casette, circa 1998-1999
Posted by Alicia, AA0NS on February 25, 2007 at 09:27:05.
Several years ago, I had a cassette tape that included sound clips of numerous radio services below 500 kHz, including Loran-C, Omega(?), aeronautical and marine navigation beacons, and longwave radio broadcasts. I converted all my audio recordings to digital in 2002, and (unfortunately) the digital recording and information about what was on that cassette never made it through.
Does anyone know where I could get the information of contributors to and sound clips on that cassette tape? I'd appreciate any help!
Thanks ;) Re: VINU 415 hz
Alicia
Posted by John Davis on February 25, 2007 at 09:53:57.
In reply to Re: VINU 415 hz posted by John Andrews on February 25, 2007
A graphical method of working out negative keying is available in the LWCA Library, in Chapter 9 of the series Re: VINU 415 hz
On The Art of NDB DXing.
Posted by Dennis ka3bvj on February 25, 2007 at 10:28:37.
In reply to Re: VINU 415 hz posted by John Davis on February 25, 2007
Thanks guys Re: Longwave audio casette, circa 1998-1999
Posted by John Davis on February 25, 2007 at 11:13:01.
In reply to Longwave audio casette, circa 1998-1999 posted by Alicia, AA0NS on February 25, 2007
Do you recall if that was the tape compiled by Kevin Carey of Monitoring Times? If so, you might contact him through his column's Web page. Re: Data (?) signal on 148 khz.
Posted by Alan G3NYK on February 26, 2007 at 03:06:34.
In reply to Data (?) signal on 148 khz. posted by Robert (U.K) on February 23, 2007
Hi Robert I think what you are listening to and using for your set-up is a "Data-Trak" signal. These are a logistics tracking system which is widespread in Europe. As such it should be active 24/7 except of course for possible failures.
Regards
Alan G3NYK
Re: Data (?) signal on 148 khz.
Posted by Rob on February 26, 2007 at 11:38:38.
In reply to Data (?) signal on 148 khz. posted by Robert (U.K) on February 23, 2007
Many thanks! so far it is the only Utillity my Longwave sets can tune, I plan to etend their coverage into the 136 khz band... This site has intrigued me! Time to leave my usual haunt on 80 meters and venture further down the dial! Re: Longwave audio casette, circa 1998-1999
Posted by Alicia, AA0NS on February 27, 2007 at 20:09:53.
In reply to Re: Longwave audio casette, circa 1998-1999 posted by John Davis on February 25, 2007
Thanks for the pointer!
potrzebie