6 hours.
Yesterday and today was an ugly mess. I had to pull the wiring harness to try to figure out a couple of things, first and foremost, why is my radio dumping RF energy into my EFIS? I’ve checked all the grounds, twice, three times, both at radio, both ends of the antenna, and the EFIS itself. I grounded the shields of the ARINC connector as well, while I was in there. It seems to be a little better. I get no clicking of relays, but I still have the Bermuda Triangle effect whenever I key the mic. I’ve also got no mic audio. I don’t know if that’s my headset, which, at last outing, proved itself extremely unreliable in the mic department. My other headset looks like the foam muff on the mic dissolved itself into the actual microphone somehow, so I doubt that one works. This just gets weirder and weirder.
One thing I’m not too sure about: If I place one probe of my multimeter against the inner conductor on the antenna’s BNC connector and the other one on the antenna rod, I get no beep. I thought an antenna had one pole connected to the center conductor and the other pole connected to a ground plane. It may be that I have a defective antenna, which would suck, but better than a fried radio or EFIS.
Looks like I’ll be ordering yet another antenna from ACS, but until then, my old RAMI whip antenna will have to do for now.