Loading

Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Bitx40 Microphone

by fire5ign, published

Bitx40 Microphone by fire5ign Aug 25, 2017
0 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps

Design Tools

Fusion 360

A part of these Groups

View All

License

Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

314Views 38Downloads Found in Electronics

Summary

Three STL files that make the components for a microphone for a BITX40 radio: a bottom, top and button pusher on the side. Use the mic and pushbutton switch parts that are included in the Bitx40 kit from Farhan. Add a phone handset coil spring wire: this design includes a robust strain relief for this type of cable. The top and bottom snap fit together but for permanent use the design includes a hole for an M3 brass threaded insert and screw. This design uses as its inspiration the mic that Giuseppe IK8YFW designed.

73, and have fun!
-Michael VE1LEB

Print Settings

Printer Brand:

Prusa

Printer:

Prusa Mk2


Notes:

I've successfully printed this in PLA and PET. For best results use the highest resolution that your printer supports.

Post-Printing

Printing

For best results use the highest resolution that your printer supports.

Fusion360 tends to save STL objects in an edge-on orientation. When you set up the components in your slicing program, rotate each shell so that the base of each shell is flat on your printer bed. You should not have to add any supports when you slice it; there's one manually-made support in the strain relief which is a very thin wall over the 'S'-- knock this out after printing, before you thread the cable through.

Threaded Brass Inserts

The shell's two halves are fastened together using an M3 screw into a 5mm threaded brass insert. You can easily embed into the thermoplastic using a soldering iron that's just hot enough to melt it into the plastic. Google "Installing threaded inserts into 3d printed parts" to see how it's done.

Wiring

This thing is designed to use the coil wire cable that's used in phone handsets. This cable contains four wires: you need one for ground (0v), one for the microphone and one for the push-to-talk button. You can leave the fourth wire unconnected, or combine it with the ground wire. The cable is pushed through the opening and then does an 'S' for strain relief. This hole is a little bit too tight and I found that with my cable I had to shave it down a bit to push it through. Use a flat-head screwdriver or similar tool to push the cable securely into the 'S' form.

The PTT switch has two leads and it can be press-fitted into place on the bottom half of the shell.

Now you can wire the PTT switch (one side to the PTT wire, the other side connect to ground), and then the microphone (one side to the mic wire--consult the instructions at hfsigs.com to tell which solder pad goes where-- and the other side to ground).

Assembly

Fit the pusher into place between the guides. The button has a curve which should line up with the curve of the side of the shell. If it doesn't seem to fit well, turn it upside-down and try again. The presser part should make the switch click; it may not click if you've pressed the switch too far into the holder.

The microphone can be hot-glued into place, but use small amounts on the side of the mic--you don't want the glue to obscure the hole that you'll be talking into!

Put the two halves of the shell together, ensuring that the internal wiring isn't obstructing the pusher or getting in the way of the screw. Use an M3 screw to fasten the two parts together. And you're done!

More from Electronics

view more

All Apps

3D Print your file with 3D Hubs, the world’s largest online marketplace for 3D printing services.

App Info Launch App

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

3D Print a wide range of designs with Treatstock. Easy to use tools to get the perfect result. The global 3D printing network that connects you with high-quality and fast working print services nea...

App Info Launch App
Top