I bought my K3S about 30 months ago and also a 700 Hz roofing filter from
Inrad. I have operated nearly 100 % CW for 64 years, and am glad I got this
filter. Through the years I have found that something like approximately a 700
Hz filter is very helpful in scanning the bands and for casual QSO’s. However
if you are on a budget something like a 1000 Hz or even one of the SSB filters
will give your nearly identical performance since the Elecraft DSP filtering is
so good. I cut my CW teeth in the old days with wide bandpass receivers and we
used our brain filters quite effectively so enjoy a somewhat wider filter so we
will be aware of things happening near our operating frequency. Now for sure
in contest operating I do often need or want to switch in my 400 Hz filter
often. I do agree with IK4EWX that CW sounds SLIGHTLY better (to my ears) with
crystal filtering than using mostly DSP filtering, however the difference is
small in most situations. So if you are a serious CW operator and have the
extra funds you may appreciate the 700 Hz filter, however something like the
500 Hz filter or a wider filter with DSP should be satisfactory for many folks.
Rick KL7CW
Sent from Mail for Windows 10
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