All unwanted frequencies may be filtered away. Such signals are very sturdy to radio noise. One simply connected the transmitter to where the morse key It was hence easy to implement on available radio equipement. Hellschript is transmitted with either on or off signal. It simply sends the message in it's own speed and the receiver must do it's best. The transmitter does not tell the receiver how fast it transmits. Hellschreiber is an asynchronous transfer mode where the signal is discretely coded. The Hellschreiber is an early faximile communication, where only upper case letters were transmitted and received. Hellschreiber, wich becomes worldwide a renewed interest is a very old mode wich was first introduced 1921 by Rudolf Hell.Welcome to IØDZR Ham's Software Italian Amateur Radio Station
