A paean to the good old days of analog is nice, but the primary reason for
digital processing having becoming the dominant form is that it's more
accurate, can do more things, is more flexible, and generally speaking
(there are exceptions) can do them at a lower cost than equivalent analog
methods
But I was speaking of the future, not to any 'good old days'.
*These* are the good old days as we'll all discover sometime in the future
:-)
Nor was there any suggestion that digital techniques aren't extremely
important, flexible and useful for certain tasks.
But digital techniques are
This was published in 2007, and makes no reference to our exalted Elecraft
K3, but it's still very interesting reading, and indirectly on topic.
Thanks to Adam Farson, VE7OJ / AB4OJ, for translation and hosting:
http://www.ab4oj.com/dl/misc/dinosaur_concepts.pdf
73,
Steve
NN4X
Nice article!
The only thing (besides initial price levels) that kept me away from SDR
based designs for a long time is computer generated interference. That's
also why the K3 shines as stand alone SDR.
It seems though computers/switching PSU's are finally becoming less RF
noisy, making SDR
However, the radio hobby industry perseveres with narrow-band design
concepts even to
the present day - usually with automatically-switched front-end BPF's, the
rare exception
being the tracking preselectors in the pioneering JRC NRD-545 (1998).
Not to quibble over details but JRC's
Right now the cheapest and most powerful tool in most designer's arsenal is
digital signal processing and digital control systems.
Remember the old saying, When all you have is a hammer, everything begins
to look like a nail.
We humans are designed to process and analyze analog data, not
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