and replaced with a 3D-printed version that stoutly holds a female TRS jack in place. This can then be soldered up to the wiring inside the headphones. With everything assembled, the headphones ...

There are a few old products that have rabid fan bases, and the TRS-80 Model 100 is one of those ... This time he hooked a handset up through a headset jack. It worked — at least mostly.