Today I finished the wiring harness for my radio and intercom and thought I'd try it out. Since there are no other electrics in the plane yet I hooked up a little 12v battery charger to the intercom in the hopes of being able to put on a headset and hear my backseater make fun of me for sitting in an airplane in a garage. Well, it all seems to work but has got the most intolerable hum. Not some little background thing, but a big loud hum! I followed the wiring instructions to the letter when building the harness, even checking continuity across all connections as I went.
So here's my question: I notice in the manufacturer's literature (PS Engineering) it says that the device needs a minimum of 13.8 volts to operate properly and my little charger only reads 11.6. Could this cause my hum? If not, then what? Geez, I don't want to fool with that harness anymore with all it's microscopic Sub-D pins! Help.
Steve Zicree
RV4
So here's my question: I notice in the manufacturer's literature (PS Engineering) it says that the device needs a minimum of 13.8 volts to operate properly and my little charger only reads 11.6. Could this cause my hum? If not, then what? Geez, I don't want to fool with that harness anymore with all it's microscopic Sub-D pins! Help.
Steve Zicree
RV4