Comment by mindcrime
3 years ago
[0] I had one of these in the 90s (in the US, where it's not illegal if designed correctly) that connected my Discman to my ridiculously sad factory radio which lacked both external input and even a cassette deck.
Heh. I drive a 2002 Chevy Suburban (don't laugh, I have a strong aversion to spending money on new vehicles) and it lacks an AUX input, so to this day I use one of those low-power FM transmitter adapters to pipe my phone's audio output to the vehicle stereo. They are amazingly handy little gadgets.
When I had a cassette deck in my car, I added an AUX input by soldering a cable to a chip on the PCB, and running it out through the cassette slot.
That's a product they sell. It looks like an audio cassette with an aux cord coming out of it. I used one for years in my old grand Marquis.
That just wires the speaker output of the device to a set of coils sitting right in front of the tape playback head. GP did an end run around that by wiring straight into the trace in between the head pre-amp and the main amp.