Hellschreiber GL 80 (1960)
 
 

The Hellschreiber 80 is a further development of the Hellschreiber GL 72. The main improvements are the use of semiconductor electronics (no more electron tubes) as well as a 5-channel paper tape reader, so that text punched in normal teletype 5-bit-code can be sent. However, the text is transmitted with the Hellschreiber method, i.e. as a pixel matrix.

The Hellschreiber 80 uses an improved resolution with a 7 x 9 pixel matrix. No notched disks are used any more. Instead, the characters are converted into the pixel image by means of an electronic circuit, which applies a core memory to store the pixel matrices.
 

  Kulturdenkmal SH en

 
Also, the Hellschreiber 80 combines transmitter and receiver in one device.
For military use, the device is housed in an aluminium case.

A special version was used in NATO.

 

 

Hellschreiber GL80 in action