This is a microphone / PTT interface for the Yaesu FT-891. I needed a way to change from a handheld mic to a headset mic. I've designed this with the ability to change mics quickly at home or in the field. The Yaesu mic uses a standard CAT6 style connector. I wired two 3.5mm jacks to a CAT6 Keystone connector. Install the 3.5 jacks into the end-plate first. Next, run the CAT6 connecter through the body and install it into the other endplate. I used #4 x 1/2" screws but slightly shorter would work too.

My first unit was printed in PLA, but I'm going to try PETG. I take the 891 portable and really don't need the interface to deform in the sun.

Creality

Ender 3 Pro

No

No

200

20

I can highly recommend https://www.thingiverse.com/thing:1977042 to aid in attaching the Keystone connector. It will definitely save your palm!

Also, I use a flat CAT6 cable from Monoprice and a CAT6 coupler. This allows the face plate of the 891 to fit as intended while allowing the microphone or interface to be changed as needed.

CAT6 Cable:
https://www.amazon.com/gp/product/B00ACR5K0G/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Connector:
https://www.amazon.com/gp/product/B07JRD69V6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This was designed using Fusion360.