matt weber wrote:
All that your experience says is that SDR probably has poor front end
selectivity.

Almost none. The dongle was designed to pick up megawatt digital TV stations
with short antennas (about 4-6 inches) antennas. Using it as an SDR is
a happy accident.

The ones sold as DVB-T dongles come with software for decoding digital
TV broadcasts, some come with digital audio broadcast decoding software, most
don't. The most popular E4000 receiver dongle did not come with FM broadcast
reception software.

Geoff.

--
Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379