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Stg-100

Stg-100 teleprinter; manufactured by Siemens & Halske, Munich.

The Siemens teleprinter 100 / T.app 100 BY or Stg-100 was widely used in the Swiss army, partly in the wired teleprinter network and partly in the radio networks with the high power SE-430 stations.

The teleprinter was procured as the successor to the Stg-34 or the modified T. typ. 37 teletypewriter, the volume of the teletype equipment was much smaller than that of the sets from the 1930s.

Siemens Stg-100

Technical data

  • Principle]]: Teleprinter (page teleprinter)
  • Operation modes: CCITT No.2 / Baudot; 50 (75) Baud

Power supply

Dimensions

The entire Stg-100 teletypewriter fits into two voluminous crates:

  • Crate A: Transport case: 617 x 682 x 762 mm; 83 kg
    • page teletypewriter Siemens T. App 100 BY with support frame: 33 kg
  • Crate B: Accessories case: 617 x 682 x 762 mm; 131 kg
    • Mains power supply unit SG 60/61: 25 kg
    • Single tone telegraphy unit ETT-60: 19 kg
    • Simultaneous transmission unit 60: 24 kg
  • optional:
    • Universal remote control unit UFG-62: 16.2 kg

The total weight of the system is 213 kg.

Accessories

  • Mains power supply unit SG 60/61: power supply from the mains using an isolating transformer, input voltage selectable from 110 - 250 V, the pointer of the measuring instrument must be at the green mark for 220 V.
  • ETT-60: provides the 60 V voltage for the line circuit (from the mains power supply unit, alternatively via backup accumulators; the ETT-60 converts the single-current pulses of the teleprinter into 1500 Hz tone pulses, which are transmitted directly or via the SIM-60 simultaneous unit to the long-distance line. In receive mode, a bandpass filter selects the 1500 Hz teletypewriter signals (bandpass 1400 - 1600 Hz)
  • Simultaneous unit 60: Connected between ETT-60 and the trunk line, the Simultaneous unit 60 allows the simultaneous use of the same cable for telex and telephony operation. The call current of 30 Hz from the crank inductor of the field telephone is converted in the call converter into a call signal of 1000 Hz, which can be forwarded via radio connections.
  • Universal telecontrol unit UFG-62: with the UFG-62, a teleprinter can be connected either to the public telex network or a hand-switched (military) telephone exchange, Point-to-point connections between two teleprinters with dedicated lines can also be used. In local operation, the teleprinter can be used to check punched tape, etc. without sending it out. - The teleprinter still remains on reception for incoming calls.
  • Telecrypto 61: for automatic encryption of messages sent via the telex connection.
  • Broadcast unit: A message can be sent simultaneously from one teletypewriter to up to six recipients using the broadcast unit.

Siemens Stg-100

System components

The teleprinter Siemens & Halske Stg-100 is a sheet teleprinter that can process signals according to CCITT No.2 / Baudot Code 50 baud, for special purposes it can be converted to 75 baud by replacing a gear set. The teleprinter is equipped with an attached punched tape transmitter (right) and tape puncher (left) and has an automatic name transmitter.

Power is supplied via the SG 60/61 mains power supply unit from the 220 V AC mains.

The Simultaneous unit SG-60 allows simultaneous communication by telephone while telegraphy traffic is in progress. As the frequency range of 1200 - 1800 Hz (around the telegraphy frequency of 1500 Hz), which is important for speech intelligibility, was filtered out, speech intelligibility was considerably restricted and the telephone connection was only intended as a service connection. In addition, the inductor call of the (field) telephone set was converted to a 50 Hz call signal in the set, which required the call converter to be switched on at both stations in order to function properly.

The Single tone telegraphy unit ETT-60 allowed the use of the teleprinter on improved telephone lines of the public network, for dialling into the public telex network the Universal - Fernschaltgerät UFG-62 had to be used.\
Eintontelegraphiegerät ETT-60

For many years, the Siemens Stg-100 remained the standard teletypewriter of the Swiss Army, here shown with the SG-61 power supply and the ETT-60 single-tone telegraphy unit.
Siemens Stg-100
If no suitable table was available, a workstation with shelves for the additional devices could be improvised by changing the arrangement of the partition walls of the transport cases.

Encrypted messages can be sent together with the CCITT encryption device Telecryptogerät 61. In contrast to the Telecrypto 53 or the KFF-58, which also works with the 14 segment code of the ETK, the Telecrypto 61 can encrypt the 5 bit code according to CCITT No.2 of the teletypewriters.

Technical principle

Tube assembly

Development

Use

From 1959, 2500 machines were purchased and in 1985 another 650 teletypewriters from PTT Surplus stocks.

Technical documentation

Further information

en/stg-100.txt · Zuletzt geändert: 2024/01/14 14:50 von mb