MX-K2 CW Keyer Magnetic Mount – Snap-In Cradle
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A snap-in cradle that holds the MX-K2 CW keyer to any steel surface with four 10×4 mm magnets. It prints without support
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- Printables
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- Electronics
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- Creative Commons — Attribution — Noncommercial — Share Alike
Summary
This full-length cradle holds the MX-K2 iambic CW keyer firmly on a steel surface such as a desk plate, radio case, operating table, field box or vehicle panel. The keyer snaps in from above under two small retaining lips, which have chamfered lead-ins and 45° supports underneath, so the cradle prints without supports.
Features:
Inside sized for the MX-K2's aluminium body (about 48 × 22 × 100 mm), with fit clearance
Runs the full length of the keyer, with a low rear stop that sits below the KEY and TRANSCEIVER jacks
Both ends open, so the SPEED knob, F1/F2 buttons, LED and jacks are all easy to reach
Four recessed pockets on the underside for 10×4 mm round magnets
A floor window so you can push the keyer out from below
A rear-section test coupon so you can check the fit before printing the whole cradle
Fully parametric OpenSCAD source: cavity size, wall and floor thickness, lip size, and magnet size and position
Outside size: about 58.4 W × 30.3 H × 105.5 L mm Inside cavity: 53.6 W × 24.2 H × 103 L mm
Print settings:
Material: PETG recommended (it flexes a little for the snap fit and handles heat).I used PCTG.
Layer height: 0.2 mm
Walls/perimeters: 3–4
Infill: 20–30%, gyroid or grid
Supports: none
Orientation: as modelled, flat base on the bed and open top facing up
Brim: not needed
Hardware:
4 × 10 mm diameter × 4 mm neodymium disc magnets
Superglue (CA) or 2-part epoxy
Assembly:
Print the test coupon first and check the fit on the rear of the keyer. Adjust cavity_width / cavity_height if needed.
Print the full cradle.
Glue the magnets into the four pockets on the underside. Keep all four magnets the same way up, with the same pole facing out.
Let the glue cure, then snap the keyer in with the jacks at the rear stop end.
Tips:
Too tight? Raise cavity_width or cavity_height by 0.2 mm. Too loose? Lower them.
To stop it sliding on smooth metal, put thin rubber or felt pads between the magnets.
On painted or delicate surfaces, put a thin layer of tape or felt under the magnets.