[Avian]’s dad got a new ham radio transceiver with a 3.5 mm jack, and his pile-of-cables got him a headphone cable from Bose headphones. He built a DB9 to 3.5 mm adapter with that one – and it failed ...

The humble aux cable or, more formally, the 3.5mm auxiliary cable, has long been a universal standard for analog audio signals. Aux cables allow you to accomplish such tasks as plugging in your ...