Start by downloading the free STL files from Printables.com: www.printables.com/model/8713...
Gather these parts:
Per Assy Short Description
2 Magnets 6mm x 2mm
4 M3x8 screw
2 M3x12 screw
1 M3x4 Set Screw (or grind down a screw)
3 M3 solder tab
6 M3 nut
2 hookup wire ~2" each
2 3x8x4mm bearing
1 3D Printed Kit
1 Stereo (TRS) plug wiring
0:00 - Intro explaining what we're up to today!
1:15 - Fusion 360 design process
1:55 - 3D printing the pieces
2:20 - Dumping my bag of parts out
2:35 - Press the bearings into the body
4:10 - Press the magnets into the body and arm (NORTH TO SOUTH)
5:20 - The pain and suffering part - Pushing the wire through the arm! It took me 45 minutes.
6:50 - Insert the contact screw into the arm
7:35 - Insert the contact spacing adjustment screw
7:55 - Press the nuts into the arm
9:10 - Strip and push the wire through the body...This one is so much easier!
10:00 - Making my own set screw because I don't have any yet. Grind Time!
10:45 - Setting the set screw contact...Sorry about the camera view. Use your imagination I guess.
11:55 - Insert both binding post screws
13:08- Thread the M3x12 screws through the bearings and into the screws on the arm, and center the arm in the body
14:22 - Set the gap
14:36 - Solder the M3 tab to the arm wire
14:55 - Fasten that solder tab to the binding post WITHOUT the internal wire. Place the other nut on the other binding post, too.
15:35 - Wiring the TRS cable...almost done!
16:55 - Use the last two nuts to fasten the connector tabs to the binding posts. We're almost done!
18:20 - The final product!
19:20 - The future plans with this key and a Pixie II QRPp CW transceiver!
19:48 - Credits and a special sound