KF4HOU Digital modes Website now there no excuse not to be QRV    |   home                                                    Feld Hellschreiber Feld Hellschreiber Invented by Dr. Rudolf Hell in the late 1920's Rudolf Hell Passed away in 2002 The first Scanned Text communications. It was used by the German Army In WWII. Very old mode now rediscovered for Amateur Radio use. Feld Hellschreiber is a on/off keying like CW is instead of deciphering the mode with your ears you are deciphering  with your eyes it is a uncoded mode. Which means when it is displayed with maybe a static crash it will distort the text some like in a Analog signal. but the good thing about the mode is you can still recover the text even if it a little distorted, and in other modes a Error Might change the text into another text or is lost with no recovery. Feld Hell is a pretty nice mode to us and very simple to operate good sensitivity and has a bandwidth of 450hz, Baud rate of 122.5 and a speed of 25wpm. And you can use multi of different fonts if you wish with the newer programs some fonts will be slower than others but some will show up better at the receivers