Hi John,
Although I do not have a 5000, I do have a SDR-1000. Elecraft and Flex
are both Good companies that produce great radios. However, I believe
one major difference between the K3 and the Flex 5000 will be in wider
space dynamic range. The close-in 2Khz dynamic range for the 5000 I
believe was measured by Rob Sherwood at 96db which is a good number.
But the 5000 does not have roofing filters, so if I am not mistaken,
the 96db IMD dynamic range will the same at 2Khz, 5Khz, 10Khz, 20Khz,
and beyond, as it is with most sound card based SDR's. To me a 96db
Dynamic range beyond 20Khz is not good. I believe that a 96DB dynamic
range is around 40-45db over S9, so if my calculations are correct, IMD
could be a problem from a 45db over S9 signal 20Khz or more away. That
is one of the reason's why I chose the K3 over the 5000. The K3's close
in numbers will be around the same is the 5000, but the wider spaced
measurements I expect to be much better then the Flex-5000.
John, KD8K
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