ham2ham

Feldhell or Hellschreiber is a method of sending and receiving text using facsimile technology. This mode has been around along time. It was actually developed by Germany prior to World War II! The recent use of PC sound cards as DSP units has increased the interest in Feldhell and many programs now support this new...or old mode. The single-tone version (Feld-Hell) is the method of choice for HF operation. It is an on-off keyed system with 122.5 dots/second, or about a 35 WPM text rate, with a narrow bandwidth (about 75 Hz). Text characters are "painted" on the screen, as apposed to being decoded and printed. Thus, many different fonts can be used for this mode including some basic graphic characters. A new "designer" flavor of this mode called PSK HELL has some advantage for weak signal conditions. As with other "fuzzy modes" it has the advantage of using the "human processor" for error correction, making it the best overall mode for live HF keyboard communications. Feldhell also has the advantage of having a low duty cycle meaning your transmitter will run much cooler with this mode.

160m	--- MHz
80m	--- MHz
40m	7.077 MHz
30m	10.144 MHz
20m	14.063 MHz 14.074 MHz
17m	18.063 MHz 18.104 MHz
15m	21.074 MHz
12m	24.924 MHz
10m	28.063 MHz 28.074 MHz
6m	--- MHz
2m	--- MHz
70cm	--- MHz