Knob friction adjustment ring
thingiverse
This is an adjustment ring for the Main VFO knob of the Elecraft K3. It adjusts the friction between the knob and the felt washer. It is designed to replace the main VFO trim panel and to go between that and the VFO tuning knob. You turn it 0..90 degrees to adjust from free spinning to harder to move. NOTE: The published model is a draft and shows the basic idea. It is not meant for reproduction. It is still work in progress. Also, please note these are two parts that need to fit together, and to move within each other. Getting the right tolerances is key to sucess. That highly depends on the capability of the printer, and to some extend oo the printing parametes used.
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