[Milsurplus] Low Frequency receiver, RBL

[KD7JYK DM09]

:I always thought the best SDR would be one embedded inside a more classical
: receiver.  Sort of a hybrid approach where the front end has the filtering
and
: low noise capabilities and the decoding and analysis are done by DSP and
other
: techniques.

I suppose, technically...

I've always envisioned a DC-daylight receiver, or in the case of the Alpha
RX, 10-14 KHz or maybe wider, it receives everything at once, more than you
could hear by ear, then use a computer with adequate spectrum analysis
software to focus on a swath of spectrum.  For example, an RX with 30 MHz
bandwidth, SEE the entire swath, zero in on a section, maybe 500 KHz wide to
watch, zero in again to listen to an odd spike every now and then.

In a similar instance, about a decade ago, I had desire to monitor a signal 
on HF that was about 200 KHz wide.  I could hear a few KHz of it, but, 
wanted to see it all.  I had an idea of a direct conversion receiver 
connected to a soundcard of adequate bandwidth, then monitor with software, 
at the time, the best I could get, price-wise, was 96 KHz bandwidth, not 
enough for that project so I dropped it.

Kurt