Hi Greg,
Very little. Both have similar passbands and protect the subsequent IF and DSP
stages from overload by signals outside of their passband. Note that we also
cascade the K3 and K3S DSP filtering after the crystal filters to further
improve the ultimate rejection of the filters.
73,
Eric
/elecraft.com/
On 5/1/2019 7:04 PM, hg chapoton wrote:
What's the difference?
greg/na8v
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