KF4HOU Digital modes Website now there no excuse not to be QRV | home
FM Hellschreiber
FM Hell
comes in to different version of 105 & 245 baud rates
FM Hell uses what is called MSK Minimum Shift Key Which only uses one sideband of the mode
which decreases the bandwidth a lot.
FM HELL 105 baud
bandwidth is about 55hz
and the speed is 25wpm
FM HELL 245 baud
bandwidth is about 123hz
and the speed is 25wpm
FM Hell modes
Has real good text resolution and the mode is real good for sensitivity and more immune to static
crashes. My personal test performance has shone on all bands and lots of different conditions
Fm hell 245 out does all other Hell modes on Europeans contacts
and CONUS contacts on 80m,30m,20m,12,10m
But it out performs only by a small margins
and is still is effective by strong static crashes and interference
And FM Hell 245 has the best Text resolution which make it easier to read on a weak signal
Also, I have received station 1000 miles away with him using 2 watts. And on my receiver I
Attuentor on and -40db of RF gain and was 99% copy with interference 10hz away
I also copied a station 4,000 miles away with my receiver Attuentor ON and -45DB gain and was
100% copy.
And they both were on 14.077 MHz in good conditions