AC1
Also called Amateurfunkcomputer.Designed by Frank Heyder.It was manufactured from 1983. Hardware is based on U880D @ 2/1,33/0,6 MHz, 1-2kB RAM, 4kB ROM.
The AC1 was published in 1983 by its developer Frank Heyder in the magazine "Funkamateur" and was specially built and used by amateur radio operators.
In addition to general learning of computer functions, the device also included the implementation of radio-based teletypewriter (RTTY), use as a Morse transmitter and Morse decoder, and for distance calculations in amateur radio.