expeditionradio wrote: > > > > Considering USA's recent diminishment of the data subband segment on > 40 meters, the projected increase in the number of Extra operators, > the declining use of morse CW in the world, and the increasing use of > digital keyboarding, the trend is heading toward more digital > keyboarding being used in USA in the 7020kHz-7040kHz part of the 40m > band, especially for DXing. This is compatible with bandplans and > actual use of digi keyboarding in the rest of the world. The newer > keyboarding modes are able to decode better than -13dB SNR, so this > makes low power DXing a reality for the average USA ham on 40 meters. > Throughout most of the world, 7040-7100kHz is filled with QRO SSB. > The SSB QRM makes 7040-7100kHz somewhat uncompatible with low power > and weak signal digi keyboarding DXing. > > 73 Bonnie KQ6XA
The above is news to me. I rarely hear any digital signals on 40M much below 7.065. The bulk of keyboard digital activity seems to take place from about 7.069-7.075 or so. If there is a trend towards digital qsos down around 7020-7040 it is not discernible. It is true that SSB from countries that permit it around 7070 is sometimes a problem, but I sure haven't noticed a "trend" towards USA ham using the digi modes moving down around 7020-7040. de Roger W6VZV
