HI, I get this kit from Palomore for the K3 and I got another for my Yaesu Quadra VL-1000. Take a good look at their website for what you will need. https://palomar-engineers.com/ferrite-products/ferrite-cores/Elecraft-Transceiver-RFI-Kits-c46846169 -- Sent from: http://elecraft.365791.n2.nabble.com/