HF Utility RTTY

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k9rzz

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Okay, I've got TrueTTY and MultiPSK downloaded, installed, and functional.

Now, someone give me *ONE* HF RTTY frequency for night time that is decodable, so I know if this is working.

I have searched and searched, and cannot find ONE list of RTTY frequencies here in the states.

Don't send me to the ham bands, that's too easy. Been there, done that. BORING.

6487, 5410, 5338khz are all very loud, but I can't decode anything on 'em.

Just give me *ONE* !
 

ka3jjz

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HF Digital Decoding - The RadioReference Wiki

You're going to find that while those are good packages, they're more or less slanted to hams and maritime. As written in the article, it's not easy to find decodable digital sigs on HF, quite apart from ours (hams). I would recommend joining groups like the UDXF on Yahoo - they often have digital logs (particularly ALE) that are very up to date

When there are big storms making their way up the coast, the Sitor-B broadcasts can be quite interesting...and we're getting into the winter months...

73 Mike
 

ka3jjz

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Check out the links - there are links there for the USCG SITOR lists, the GHFS ALE networks, FAX...

The USCG and FAX lists are where I would start, since they're on a fixed schedule (whether you hear 'em or not is a matter of propagation, of course...). It's very hit and miss with the GHFS stuff - they're on whenver and wherever they wish.

73 Mike
 

ka3jjz

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By the way, that article also has numerous websites that play (and sometimes show a waveform for..) sounds of digital signals and then go and identify them. That's one way to begin to identify who the user might be - when you have a background of information gleaned from places like the UDXF

Time to become a detective, my dear Watson 73 'Sherlock' (hi)
 

k9rzz

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C'mon. You guys pretend to be the experts, do you ever turn on a radio? I don't want lists that were last updated in 2002, I just want one frequency that I can decode RTTY. Just one!
icon10.gif
 
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ka3jjz

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Why not try the freqs and see what happens? The SITOR freqs are still good, at least they were during the spring when I saw Boston's broadcasts...many of these freqs don't change over a long period of time.

And once again, you can get more up to date and timely information from mailing lists like the UDXF

73 Mike
 

k9rzz

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I'm asking the experts. The guys who monitor this stuff. Give me O-N-E. Otherwise, I'll assume there aren't any.
 

yooper927

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Here's one for you, not very interesting at the moment but something to try and decode.

0600 UTC
Shift 850Hz / BAUD 75

5097 Khz - CFH Halifax Nova Scotia repeating the following over and over about every 30 seconds for the last few hours, normally they do weather broadcasts:


NAWS DE CFH ZKR F1 2822 3394 4161 8324 12374 AR

NAWS DE CFH ZKR F1 2822 3394 4161 8324 12374 AR

NAWS DE CFH ZKR F1 2822 3394 4161 8324 12374 AR
 

k9rzz

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I'll look for them tonight. I hear plenty of RTTY on HF, but can't get ANYTHING to decode. Thought maybe I could find some New Delhi to Nepal traffic running 60 year old equipment, but ZILCH!
 

k9rzz

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G4NSJ HF RTTY FREQUENCIES SHIFT BAUD BAUDOT WEATHER FORECAST

I'm listening to Canadian Forces weather - 10,943khz, USB, 850khz, 75 baud, great signal - BUPKIS!

TrueTTY and MultiPSK

Jibberish.

Grrrr ...

EDIT: HURRAY! "NAWS DE CFH ZKR F1 2822 3394 4161 8324 12374 AR"

NAWS DE CFH ZKR F1 2822 3394 4161 8324 12374 AR



CJ/6D CJ/6D DE CFH CFH R AR"

Maybe those are frequencies.

Edit^2: Just noticed that -by accident- I've got the software in 'reverse' and it's copying! WTF?

 
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k9rzz

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13,049khz USB Reverse 170hz 50baud

Sig kind of weak and fluttery. Looks like Lat. and Long.



OPASNO IH PREDELAMI RAJBNE
69-2090' 035-10.02
70-00.0' #035-10.02
70-20.0' 042-00.02
70-29.0'8 050-00.02
70-24.0 056-14.02
70-29.0' 059-0-.02
70-00.0' 861-05982
69-49.5' 061-09.02

69-31.8' 060-14.82
019-54.0' 057-54.02
69-54.0' 047-00.02
69-20.0' 040-00.02
 

yooper927

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Congrats on you RTTY decode..

Most stations use LSB for RTTY but sometimes USB gets selected accidentally or on purpose. This is why there is a button marked REV (Reverse). When you have a station tuned correctly but all you see is nonsense printing, click on REV and your signal will be reversed.
 

k9rzz

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LSB? Where did that come from? Okay, good to know.

Another one:

12841khz USB Rev 850hz 75 baud 3 letter groups 1800z weak sig
"02A 04B 06A 12A 16Y 22X" REPEATED. Could be radio channels? No call given, then suddenly off air.
 

ka3jjz

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With some radios, the tones come through better on one or the other sideband. Others have a dedicated RTTY mode, but that's usually set up for a fixed standard (do what most hams don't do, hi - check the manual). It varies, sometimes greatly, from one manufacturer to the next. One radio might hear it better on USB, another totally different radio on LSB. It's very hard to be able to predict which will work. That's part of the reason why RTTY stations are no longer reported with a Normal (mark audio freq is lower than space) or Reverse (mark audio freq is higher than space) sense. It does take a little trial and error sometimes...73 Mike
 

SCPD

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Hey K9rzz i was in the same situation as you with rtty and ale. I use multipsk how do you like truetty? can you set the shift in truetty? I had a lot of success with digital780 from hrd but alot of stuff on HF is encrypted. Im no expert but i also have a lot of fun decoding anything i can on HF that is non ham related.
Thanks for posted your logs. I will give it another go when my rx320 gets here.
 

SCPD

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Yes, I always learned that RTTY (and most digital) signals are sent over LSB. This may be why the reverse worked for you on USB. You were essentially converting to LSB mode via software.

I've tried for a *long* time (many years) to intercept RTTY/SITOR/STANAG and other utility digital traffic but have rarely found success except from the usual Wx stations.

The biggest disappointment is the software. Most software is written so poorly that it crashes constantly, i.e. Sigmira.

Sigmira could be really good software but it's extremely flakey and I spend more time fixing issues than receiving signals.

With yesterday's intercept, I'm very tempted to invest in the Excalibur SDR. They have a nice add-on software package to decode digital signals. I believe this software works with their new SDR but I'm not 100% certain.

Back in the day, I remember the Hoka Code 3 software/kit. I really wish I could have afforded that back then. I was told it was *really* good software for digital analysis.
 

SCPD

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Sweet. Just got a SITOR station.

6312.30 khz USB
AMTOR-FEC - NORMAL
100 Baud/170 Shift

OFFSHORE WATERS FCST
NWS OCEAN PREDICTION CENTER WA DC
300 PM EST SUN NOV 14 2010
NEW ENGLANDCONTINENTAL SHELF AND SLOPE WATERS FROM 25 NM
OFFSHORE TO THE HAGUE LINE...EXCEPT TO 1000 FM S OF NEW ENGLAND.

SEAS GIVEN AS SIGNIFICANT WAVE HT...WHICH IS THE AVG
HT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HT.

ANZ080-150230-
300 PM EST SUN NOV 14 2010
.SYNOPSIS FOR NEW ENGLAND WATERS...A HIGH PRES RIDGE WILL REMAIN
OVER THE REGION THRU TUE...THEN MOVE E OF AREA WED.
DEVELOPING LOW PRES WILL APPROACH FROM THE SW TUE...THEN
STRENGTHEN AND PASS NE ACROSS NEW ENGLAND LATE WED...WHILE
PULLING A COLD FRONT OVER THE WATERS WED. THE LOW WILL
STRENGTHEN NE OF THE REGION THU. HIGH PRES WILL START TO BUILD
IN FROM THE W THU AND FRI.
 

ka3jjz

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Maybe NMF Boston, 6312.3 + 1.7 khz (for the carrier) = 6314, which is the freq listed on the NOAA page as linked in our wiki. The traffic is another clue. Nice cross country catch 73 Mike
 
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