RTTY Radio Communication RTTY Radio Communication Many people probably see radio amateurs as guys with fiery eyes tirelessly tapping the Morse code on the tapper key. However, this image has become hopelessly obsolete as radio amateurs now use modern technologies including digital solutions. Still, as the proverb says: what's old is new again. Actually, even tapper keys can be classified as digital solutions as they use only two symbols - dot and dash or using the present-day language - one and zero. However, radio teletype or RTTY is more advanced radio communication technology. In fact, radio teletype is one of the oldest digital modes. The radio teletype code was created so as it was the machine that coded and decoded information. Initially, there were mechanical devices using Baudeaut code. Such machines converted each symbol entered with a keyboard into a 5-bit code preceded with a start bit and ended with stop bit. Currently, this code is generated by a computer using special software. Frequency-shift keying transmits Baudeaut code within the radio amateur band with the frequency deviation being 170 hertz. As RTTY signal uses constant power broadcasting the load ratio is 100%. However, the RTTY is not free from shortcomings ie frequent errors occur when shifting from figures to letters.
Cormac CQ100 + MixW (RTTY) - 20m band Maybe it's not a real ham radio stuff, but You have to be a licenced ham radio operator to use that program. I use MixW for digital mode (RTTY). For detals, visit:
RADIO TELETYPEWRITER AN/GRC-46 RADIO TELETYPEWRITER AN/GRC-46 - Department of Defense 1963 - PIN 28384 - DESIGN, CAPABILITIES AND OPERATION FOR CW, VOICE AND TELETYPEWRITER COMMUNICATIONS; OPERATOR MAINTENANCE; VARIOUS MODELS OF SET AND RELATED TELETYPEWRITER SETS AND EQUIPMENT.
AA5HL RTTY Intercept 14.070 Mhz. 4/13/2010 Radio Teletype Received with big signal. DM780 demodulator software/Waterfall Display/Spectrum ***ysis
Elecraft K3 RTTY K3 #191 in QSO during UK DX contest 20-01-08 not long after I received the radio. later I found out the Idle time can be cut immediately after TX which is not done on this video. Transmitting using stored messages in radio and by morse paddle to demonstrate this ability during the K3's first release batch. I am not a RTTY op. 33' vertical doublet and 40 watts. Hum on transmit is my regulated power supply under the bench.
Ham Radio BPSK31 RTTY Discovering the many different modes and bands of radio.
PI4WNO in WAE-RTTY-2008 The PI4WNO contest-team active in the Worked All Europe RTTY contest with 2 radio's in Multi/Multi section.What a nice contest,....have a look!
Z37M - CQ WPX RTTY 2009 CONTEST
ARRL RTTY Roundup Contest Video of my 2007 ARRL Roundup RTTY contest operation.
Vintage Computing - Commodore 64 Decoding Radio Teletype My C64 decodes Teletype received by my Kenwood R5000 from DWD Hamburg. The C64 is using the Microlog (G&G Electronics) SWL expansion cartridge. The Teletype is from Deutsche Wetterdienst, the German metoerological service on 7646kHz.
CQWW RTTY Amateur Radio Contest My first time ever on RTTY or other digital modes. I wish I had a macro lens on the camera and someone else to operate it plus some daylight bulbs. Pimp this video.
Realistic DX-100L Receiving RTTY and Fax A Realistic DX-100L is made more stable by adding a better heatsink to a transistor in the VFO, and then receives RTTY from DWD Hamburg, and a weather fax from GYA Northwood.
YV1RDX CQ WW WPX RTTY 2008 FT-2000 MICROKERYER II YAESU FT-2000 and MICRIKEYER MICROHAM II during the CQ WW WPX RTTY 2008. OPERATOR YV1RDX Julio.
Radio teletype from car
CQ WW RTTY 2008 - OY3JE N1MM Contest Software Flex 5000 radio Acom 1000 amplifier 40m 4 Square (inv L) and switchbox form Comtek
COPYING RTTY (ITTY) AFSK - MUSEUM OF COMMUNICATIONS - SEATTLE We typically drive the Teletypes at the museum off of George Hutchison's RTTY service over Internet otherwise known as ITTY. Its received as a low bit rate Audio Frequency Shift Keying at 2125 MARK / 2295 SPACE (a 170 shift). The oscilloscope gives a visual representation of the MARKs and SPACEs that you can hear in the two modulated tones.
SITOR A - Sample 1 SITOR A Channel Marker via WLO (Mobile Alabama) SITOR (simplex teletype over radio) is a transmission mode used to transmit textual messages akin to regular radioteletype (RTTY), but implements simple error correction. www.nws.noaa.gov mt-
9H1CL RTTY QSO RTTY QSO between 9H1CL from Malta and UX5IO from Russia.
Frequency Shift Keying on Oscilloscope This is what RTTY looks like on an oscilloscope. RTTY stands for Radio TeleTYpe, a method of sending typed characters over the radio. It works by changing the carrier wave between 2 frequencies (mark and space). The top line is voltage vs. time, the middle line is instantaneous frequency vs. time, and the bottom pattern is what it would look like if plotted as a radio fax.
RTTY Contest 2008 A Video of the 2008 RTTY Contest, from ZL2FT's Station in New Zealand.
ICOM IC-7000 RTTY.MP4 My ICOM IC-7000 demo on RTTY
RTTY - Weather forecast on shortwave Radio: Icom R8500 Antenna: Diamond WD-330S Software: TrueTTY
RTTY 45/170 - Sample 1 RTTY 45 Baud, 170 Shift Radioteletype (RTTY) is a telecommunications system consisting of two or more teleprinters using radio as the transmission medium. FROM: During World War II, military services started wireless Radio Teletype (RTTY, sometimes pronounced as "ritty") communications, connecting and modifying existing TTY machines (that used wires) to receivers and transmitters. All this bulky and noisy military and commercial surplus equipment (keyboard terminals, teleprinters, punch tape perforators, etc) became the main equipment for the RTTY radio amateurs until microprocessors made their arrival in the 1970s. Noisy selector magnets used in mechanical decoders to detect the status of the loop current (mark and space), tape readers, perforators, loop power supplies, were all replaced by a small chip, that made all jobs better. Devices like HAL DS3100, consisting of an electronic keyboard, a monitor and the modulator-demodulator were not uncommon in a Ham shack and the easy-to-operate equipment made more amateurs active in RTTY operation. These days, (de-)modulation is typically done with freeware on a PC, using the PC's soundcard. www.aa5 (MOCK QSO WITH ART BELL, W6OBB)
Commodore 64 & DX394 decode RTTY and Morse An afternoon spent rekindling my youth with my C64 and a Microlog SWL expansion cartridge. I wanted to decode things with old kit a while back, but couldnt find the necessary hardware, so I started to program my own Morse decoder in CCS64 which would have had a sound switch based around a 741 op-amp. Then I found a firm who were selling the Microlog (G&G Electronics) SWL cartridge, which arrived here a few days ago. This is the first proper test at using it to decode both RTTY and CW.
TELETYPE MODEL 28 ASR COPYING ITTY - MUSEUM OF COMMUNICATIONS - SEATTLE This is a Teletype Model 28 ASR copying the ITTY News Service (RTTY). It is operating at 60 words per minute.
DX-394 Receiving RTTY & SYNOP From DWD My Realistic (Radio Shack) DX-394 receiving weather information from Deutscher Wetterdienst (yes I know I screw up the pronunciation in the video!). This was on 15/05/09 in the afternoon on 4583kHz. The software used for decoding is SeaTTY, and the SYNOP converter is Synopdecoder For DOS by Meteoware.
Military-civilian air traffic control, Nice, strong signal. The callsigns here are 5XT and MKL. MKL is an RAF callsign (see while 5XT is the fixed callsign of a small civil jet (a Hawker 800XP - see - at least that's how I understand it. Any corrections welcome. MKL talks of diversion airports, Aberdeen and Prestwick, while 5XT asks whether MKL's 'RATT' (ie Radioteletype) is serviceable. The answer seems to be no. Recorded at 6697 khz USB.
VP2MUM (DL2RUM) Using his RUMped contest software on 30M RTTY Here is a video Tom DL2RUM took while operating from VP2MUM. RUMped contest software was written by Tom and he has integrated Chen W7AY's Cocoamodem software. Check out Tom's website at www.dl2 and Chen's http Thanks!
Listening to CQ WW RTTY I occasionally like to listen to digital modes on 20m. Last weekend, CQ WW RTTY contest took place, and this video shows how it was heard in my QTH in Laguja, Estonia. Note: I can only listen on HF bands. However, I appear quite often on 2 meters. RX: UW3DI decoding was done by Asus Eee PC running gMFSK
4O3A WPX RTTY 2009 4O3A M/S team in CQ WW RTTY 2009 contest. Claimed new World record - 9.5 Million points. 2910 QSOs, 879 Multipliers, 10900 QSO points. Team members: 4O3A, 4O4A, S51D, YU1JW, Z30A
RTTY-Contest-01-09-2011-SLICE-1.wmv 2011 January RTTY Roundup Contesting on 01-09-2011. I was just casually hunting and pouncing on RTTY signals on 40 meters and a little on 20 meters. These bands were very much alive with many RTTY signals. It was a good way to get a bunch of contacts for Worked All States and such awards. And also a good way to get your feet wet in Radio Teletype with fast contacts of the wham-bam-thank-you type.
RTTY at Pacificon 2010 Demo of Teletypes Model 29 KSR, Model 19, and HAL ST-6000 at Pacificon 2010 in San Ramon, California. W8TTY set this up for The two HAL modems appeared to be printing data and baudot art pictures from a computer feed, and the scope was showing the modulation.
GM3ENJ 1960's Radio Teletype in operation 8mm cine film of Ken Street GM3ENJ's Radio Teletype taken in the 1960's. Ken is still active on the radio in Dunfermline. Thanks to Jimmy Priddy GM3CIG for the film to VHS conversion. [Film taken by Jimmy Priddy GM3CIG]
RTTY 100/850 - Sample 2 RTTY, Radio Teletype 850 Hz 100 Baud A mode of transmission used to transmit text messages. Uses FSK or AFSK emission types. Mainly used for keyboard-to-keyboard communications. NATO military services use 75 or 100 baud - 850 Hz. A few naval stations still use RTTY without encryption for CARB (channel availability broadcasts). The US Military used radioteletype in the 1930s and expanded this usage during World War II. The Navy called radioteletype RATT and the Army Signal Corps called radioteletype SCRT, an abbreviation of Single-Channel Radio Teletype. www.navy-
RTTY Telex broadcast VERON A35, part 1/1 RTTY Telex broadcast VERON A35 Regio Nijmegen PA2P www.pa2
RTTY DEMO 012710.wmv Demonstration of Radio Teletype, a mode of communication used in amateur radio.
ARRL RTTY Round Up 2010 - VE6SKY QRP FT-817nd A short video of me (Ve6sky) working RTTY round up 2010. A short intro to my small shack. Get out and have fun working QRP! 73. Sorry for the shaky camera work.
Video 100.wmv RTTY - RadioTeletype on Ham Radio using Kenwood TS-480SAT HF Transceiver and Ham Radio Direct HRD software with DM 780 Digital Modes Software. I was in the US Navy from 1977 to 1981 and RadioTeletype was basically our "Internet". The Fleet Broadcast by Radio Teletype gave us our orders and kept us informed. It was Crypto - Encrypted and Protected. We could also pre-punch paper tapes with outgoing messages to send. But I never did RTTY from my own home. Thanks to computers and sound cards these days and modern HF Rigs or HF rigs with special adaptor boxes we can do a LOT of things.