<stuff not quoted>
for microwavers, monoband is useful for those that use only commercial
converters with the
usual IF frequencies.
however, as we go to higher bands, it is harder to get an LO even close to
an exact
frequency. I tend to adjust the crystal for max output, where it might be
relatively stable
and might start at cold temperatures. one of the attractions of the SDR
for me is that
I wasn't limited to just ham bands -- if my IF ends up at 37.456 MHz after
3 conversions
and tunes backwards, it isn't a problem. with a bit of coding, the dial
could even read the
real frequency and the tuning could be reversed in software.
at the other extreme, there are folks who don't even use the big knob in
the middle of
their radios. a fixed LO and simple mixer into the soundcard would
suffice. the small
amount of tuning in the software would be more than adequate.
now, how about having a fix-tuned front end for each of several calling
frequencies...
either an audio switch sampling them sequentially, or several sound cards,
could monitor
a bunch of bands. and the real trick: stop and record anything that breaks
squelch, and
sound an alarm. then I come running and play it back to get the call
73
paul
and thanks to all who pointed me to the USB driver -- works great
