FSK Hell
A variant of Hellschreiber that paints text using two tones instead of on-off keying.
ModeFSK Hell
FamilyText as a picture
Audio example12 s
What does it sound like?
Plate 17Text as a picture
A buzzy, rhythmic rasp with a two-tone texture.
0 Hz1,0002,0003,000 Hz
12-second example. A clean example made by our own signal generator; signals on the air usually sound noisier.
Field marksHell text sent with two tones instead of on-off
Who uses it?
Amateur radio enthusiasts.
Where and when can I hear it?
Various ham frequencies.
Easily confused with
- Hellschreiber (Feld Hell), from the same family