HW_ED1000
In old days a lot of electronic components are use to build a modulator and demodulator for Frequency-Shift-Keying (FSK). Today most of the work can be done in software.
A (USB) sound card is used to play and record the carrier frequencies and 5 electronic components adapts the audio signal to teletype ED1000.
With this USB sound card adapter the teletype can be connected to a Windows-PC, a Linux-PC, a Mac (not tested) or a Raspberry Pi (not tested). A USB sound card is available in online shops for about 10€. Using a PC or laptop the build-in sound card can be used also.
| Pin | Description |
|---|---|
| 1 | Line a |
| 2 | nc |
| 3 | nc |
| 4 | Line b |
| 5 | Bridge to 6 |
| 6 | Bridge to 5 |
| 7 | nc / Option: Paper-End-Switch |
| 8 | nc / Option: Paper-End-Switch |
The line wires are used to send and receive at the same time like a MODEM on phone wires.
The bridge between pin 5 and 6 is for signaling a connected plug. May be high voltages can be used by teletype!
Some teletypes use a switch (relay) on pin 7 and 8 to signal paper end.
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Local use
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i-Telex
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Advanced Topics
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Tools & Gadgets
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TW39 (current loop)
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ED1000 (FSK modulation)
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V.10 (TeKaDe FS200, FS220)
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SEU-M-board based
- with Austrian AGT (Ö-AGT, current loop)
- as replacement for SEU-B card inside LO2000, LO2001, LO3000