[Elecraft] Re: Effective add-on for your K1 or K2

[Jerry T Dowell]

It should be noted that the SCAF-1 is a low-pass filter with variable
cut-off frequency, not a bandpass filter. The minimum bandpass is 450 Hz,
since that is the minimum cut-off frequency. That is not to say that it will
not be effective.

I use a Timewave DSP-599zx occasionally with my K2. It works well in many
types of tough QRM/QRN conditions. It also has the advantage of flexibility
and offers RTTY, etc. IMHO, however, DSP is not all it is touted to be, at
least insofar as CW is concerned. Dynamic range can be a problem with all
DSP. Noise reduction seems to be good on SSB, but not always useful on CW.
However, if one can get a unit for a decent price used, it might be a better
choice than the SGC or other DSP units looming on the horizon for the K2.

Jerry  AI6L