Mark,
The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking
Dynamic Range rather than the 2 kHz Narrow Spaced Dynamic Range.
The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc)
on Sherwood's Receiver Test Data page. The K4 series without the "HD"
option are estimated to be in the 120 to 130 dB range, typical of other
direct sampling SDR products (Flex, Apache, Icom, ...).
73,
Lyle KK7P
On 6/4/19 4:00 PM, mark roz via Elecraft wrote:
Before putting my money up front for the first run of K4D I need to know what
is the dynamic range
of the K4D RX at 2kHz spacing. K3 is 105 dB and K4D? If it is 20dB lower than
K3 than it would be 85dB-correct?
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