Scott,

Unless you do quite a bit of physical modification to the K2, you cannot use both of them - they both fit into the same physical space.

The KDSP2 has filtering with more selections than the KAF2, and adds noise reduction, and other neat functions unavailable for an analog filter such as the KAF2.

I prefer the KAF2 for CW because it is somehow easier on my ears than the KDSP2 - hard to explain, that is a very subjective assessment. But for SSB, the KDSP2 wins hands down - the KAF2 only provides a low-pass filter for SSB while the KDSP2 has several quite usable functions as well as filtering in SSB.

73,
Don W3FPR

Scott McDowell wrote:
Hi
I just received the KAF2 and the KDSP2 options for my K2 from the xyl as birthday presents (73rd). I notice that both options have the real time clock. My question is what does the KAF2 option do that the KDSP2 option doesn't do? Or, is there any reason to have both installed ?
Thanks
Scott N5SM

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