P-mag wiring
Since the P-mags are installed again, I hooked up the power, ground, and enable wires to them. I ran the ground wires to a stud on the (unused) vacuum pad. I also hooked up a 2-conductor shielded wire I bought from Spruce to the control lines. These can be hooked up to a serial port on a computer to change the amount of timing advance. For now, I’m planning on just hooking the wires to each other in the cockpit, which selects a conservative advance.
I also installed a stereo mini jack from Radio Shack in the bottom flange of the panel and hooked it up to the music input of the PMA-8000B. I plugged in my iPod and it worked perfectly. The music mutes during activity on the active frequency, unless the “Mute” button is pushed. The music jack is automatically grounded at the panel, which is not ideal. If I run into problems with it, I’ll swap it out.
