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RADIOHF - Elecraft 400 HZ CW Filter - k3 k3s NEW ! ELECRAFT K3 and K3S 400HZ CW and DATA Filter - KFL3A-400 -Brand New $124.00 EA. Delivered - check, Zelle, PP FF ok. This is the most popular filter that I sell. If you want to add a CW filter to your K3 or K3S,this could be for you. Pretty simple to install. These were $169.99 on the Elecraft site before they discontinued them. Buy it here for less :) Please see pictures of everything included. If you need other K3 radios or options,I probably have what you need. I can be reached through email if you have questions about this unit. Larry K6RO Listing #1744298 by K6RO Submitted on 09/26/25 Submitted from syn-067-253-101-060.res.spectrum.com Click to Contact Back to Previous Page

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