# generate freq file by: awk '/QSO:/{print $2}' log.cbr > freq
set terminal png
set output '160m.png'
plot [0:3800] [1800:1850] 'freq'
set output '80m.png'
plot [0:3800] [3500:3600] 'freq'
set output '40m.png'
plot [0:3800] [7000:7100] 'freq'
set output '20m.png'
plot [0:3800] [14000:14100] 'freq'
set output '15m.png'
plot [0:3800] [21000:21150] 'freq'
set output '10m.png'
plot [0:3800] [28000:28100] 'freq'