Table of Contents
What is a Ratt rig?
These rigs were common in the Army, National Guard and Reserve and could be found in Signal, Infantry, Artillery, Armor, Quartermaster, and Aviation units. They were used for message handling in most units, for spotting, targeting & TACFIRE in Artillery units, and for Aviation Weather operations in Army Aviation units.
What does RTTY mean?
Radio TeleTYpe
RTTY (Radio TeleTYpe) is a method of using tones to send digital messages between radios in amateur HF bands (and other services). While it has been around for many years, these days it usually involves using a computer and modulation/demodulation software to send/receive messages.
How do I get RTTY?
You have to get audio (the RTTY tones) from your sound card to either the mic input or audio input on an accessory jack to your radio. And you must be able to key PTT on the radio to turn the transmitter on. With AFSK, there are several ways of getting both of these criteria done.
What does ham radio phone mean?
For example, the term “phone” refers to using your voice on the radio. Hence, you will hear hams referring to “phone mode” or “the phone modes,” meaning an operation in which the operator is speaking into a microphone and pumping voice signal out over the airwaves.
What does PSK31 look like?
A PSK31 signal just sounds like a single tone or note with a slight wobble and is used for real-time keyboard-to-keyboard informal text “chats” over the air.
Is PSK31 the same as RTTY?
It differs from RTTY in that characters in PSK31 mode (31 bits per second/bps) are formed by changing the phase of the sound wave. RTTY is a binary frequency shift keying modulation scheme that involves sending a two-toned audio signal. PSK31 also enables Hams to enjoy real-time keyboard-to-keyboard chatting.
What frequency is used for PSK31?
PSK31 Frequencies
| Frequency | Amateur Band |
|---|---|
| 7.040 MHz* | 40 meter (regions 1) |
| 7.070 MHz* | 40 meter (regions 2) |
| 10.142 MHz | 30 meter |
| 14.070 MHz | 20 meter |
What is D star in ham radio?
The D-STAR stands for Digital Smart Technologies for Amateur Radio. It is an open standard digital communication protocol established by JARL*.
When were teletypewriters used in the military?
Recall that during WW II and thru most of the 1940s, teletypewriters were used mostly at Corps level and higher in the field, largely due to their extreme weight
When did the military start using radioteletype in WW2?
The US Military used radioteletype in the 1930s and expanded this usage during World War II. The Navy called radioteletype RATT (Radio Automatic Teletype) and the Army Signal Corps called radioteletype SCRT, an abbreviation of Single-Channel Radio Teletype.
What is a radioteletype teleprinter?
Radioteletype evolved from earlier landline teleprinter operations that began in the mid-1800s. The US Navy Department successfully tested printing telegraphy between an airplane and ground radio station in 1922.
What kind of Teletype did the Army use in 1967?
In 1967 in RVN, the Army was using TT-4A, B & C models. The TT-4 was the new Kleinschmidt Co.’s first product and was accepted by the Signal Corps as their standard teletypewriter c1950 to replace the Teletype Corp. M15. Note the hooks on the side of the bottom plate that are not used to secure the cover.