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RTTY - FSK/AFSK interface - Diagrams and tips
https://www.ik3qar.it/rtty/1/
Rtty interface (FSK/AFSK) with sound cards. Or how to remove the so called "ground loop" and the reentry in the RTTY broadcast and make radio and PC happily coexist. One of the problems that affects our digital broadcasts which make use of audio cards, as for instance RTTY and PSK 31, is the reentry of the signal between RTX and the PC.
Sound Card Interfacing for RTTY, PSK31, and SSTV - IW5EDI ...
http://www.iw5edi.com/ham-radio-reference/sound-card-interfacing-for-rtty-psk31-and-sstv
The above circuit is recommended for use in SSTV applications with use of the sound card with a computer. This is the JVComm style of interface. This circuit may also be used for RTTY and PSK31 applications. Many users modify the above circuit to include 1:1 isolation transformers within the Speaker out and Line-in or microphone in lines ...
Rig to Soundcard Interface – M0UKD – Amateur Radio Blog
https://m0ukd.com/homebrew/rig-to-soundcard-interface/
Both of which are variable inside the interface via two preset resistors. It also contains two optocouplers, one to switch the radio to TX and one for RTTY FSK keying. The audio transformers I used are 20k primary, and a 2k centre tapped secondary. There is a few ways it can be used.
Basic RTTY Interface
http://www.w7ay.net/site/Applications/cocoaModem/UsersManual/RTTYPage/BasicRTTY/BasicRTTY.html
The basic RTTY Interface shown in Figure 3 is loosely separated into five sections. Just below the tabs for selecting cocoaModem interfaces is the RTTY Control Panel, below that is the Receive text view, followed by the Transmit text view, then the …
cocoaModem RTTY Interfaces - w7ay.net
http://www.w7ay.net/site/Applications/cocoaModem/UsersManual/RTTYPage/index.html
Part II. RTTY Interfaces. cocoaModem contains three separate RTTY interfaces - a "basic" RTTY interface, a Dual RTTY interface and a Wideband RTTY interface. The three interfaces share the same underlying implementation and differ from one another mainly in the user interfaces. The Dual RTTY interface also has two independent demodulators.
Getting Started On RTTY - AA5AU
https://aa5au.com/GettingStartedOnRtty.pdf
know for RTTY includes special "buffers" which hold pre-typed messages that can be sent by pressing a function key or clicking a button on your screen with a mouse. The late Junior, previously N5JR (this call has since been re-issued to Joel Rubenstein who is an active RTTY operator too), was a paraplegic and earned RTTY DXCC before he died.
Computer to Rig Interfacing You Don’t Need to Buy an ...
http://audiosystemsgroup.com/HamInterfacing.pdf
4 Simple RTTY Setup with PTT • This is the same as the first setup, but it uses PTT rather than VOX – PTT for RTTY requires a second serial port – No good reason for PTT – VOX works fine! Simple CW Setup • Buy WinKey as a kit ($78) –Build it in two hours –Use your paddle with it for things that aren’t programmed in your Logger –It’s a nice stand-alone keyer too
Getting Started in RTTY - OnAllBands
https://www.onallbands.com/getting-started-in-rtty%ef%bb%bf/
Another popular RTTY decoder/encoder freeware application is 2Tone, introduced in 2012 by G3YYD. Receiving RTTY requires that the receiver audio is connected to the PC soundcard recorder input, which is then accessed by decoder software such as MMTTY. A simple audio cable between the radio and PC is all the hardware needs.
RTTY – Junknet.Net
https://www.junknet.net/radio/rtty/
In most modern cases, a USB audio interface now replaces the “terminal unit”, and software like FLDIGI replace the teleprinter, but as the RTTY protocol uses the old Baudot character set at 45.5bps baud, most older gear still works fine! For example a Model 15 teletype can be used for RTTY, and it first came out in 1930!
TS-2000 Rig interface for RTTY | QRZ Forums
https://forums.qrz.com/index.php?threads/ts-2000-rig-interface-for-rtty.477557/
The TS-2000 is capable of both AFSK and FSK operations. Not sure how MMTTY handles the keying but most of the programs use an audio tone that is shifted, thus A (udio) F (reqency) S (hift) K (eying) and that requires a way to interface the terminal to the 2000 at an audio level. Now, straight forward FSK (note the missing A) is a direct ...
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