This extract is forwarded from the topband reflector discussion. My
only comment is to look at the cheap Elecraft K2 and use it as a
comparison to high-dollar radios. These numbers don't tell
everything, but that are a starting point::
>> But back to Tom's point. I went through a number of swept test data
and was
surprised to find that my generalization was not true in all cases. Here is
the 5-kHz data for the rigs I checked:
(In alphabetical order...)
Rig BDR IMD DR
Elecraft K2 126 88
ICOM IC-706 MkII G 86 74
ICOM IC-756 98 67
ICOM IC-756 Pro 104 80
ICOM IC-775DSP 104 77
Kenwood TS-570D 87 72
Ten-Tec Omni 6+ 119 86
Yaesu FT-1000MP 111 83
Yaesu FT-1000MP Mark V 106 78
In the vast majority of cases, the numbers are less than at the 20 kHz
spacing, but the amount of variation between similarly priced radios was
unexpected.
Note that some of the above rigs would experience a _blocking_ response
from an S9+30 signal that was more than 5 kHz away.
You can expect that I will be examining this issue further.
73, Michael, KC1SX
73, Tom
(W8JI@akorn.net)
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