Noisy Intercom

[NASA515]

I have somewhat similar problems, and have no music jack problems, since I never hooked up the jack (I don't want or like music while flying.)

This intercom leaves a lot to be desired. Either my wife can't hear me or I can't her or both can't hear the other. If I reduce the squelch break setting, we get all the flying noises. I've tried with three different headphones.

The squelch circuit seems to be too sensitive and has a notch type kick-in - getting that sweet spot is impossible for me. Adjusting it in flight is an exercise in futility. We do a lot of yelling back and forth at each other, and we're not even having a fight.....

Bob Bogash
N737G

[rvbuilder2002]

Originally Posted by todehnal

Thanks Scott! This seems very logical. Now, do you have any thoughts about a solution? I would even consider eliminating the music input, if I could get rid of this noise. I just need to know how to do it. Perhaps I damaged the music jack when I installed the harness.

Thanks for your thoughts...........Tom

When dealing with problems related to low level audio signals that get amplified, it can be a challenge.
Most likely some type of EMI is getting induced into the wiring for the music jack. The first thing to do would be confirm that by disconnecting the two music wires that feed into the back of the intercom and confirm that clears up your noise (you should be able to confirm which pins by referring to the install document that came with your intercom, or look for it on Flight Coms web site)

[todehnal]

Originally Posted by rvbuilder2002

When dealing with problems related to low level audio signals that get amplified, it can be a challenge.
Most likely some type of EMI is getting induced into the wiring for the music jack. The first thing to do would be confirm that by disconnecting the two music wires that feed into the back of the intercom and confirm that clears up your noise (you should be able to confirm which pins by referring to the install document that came with your intercom, or look for it on Flight Coms web site)

Thanks Scott. That really sounds like a terrific isolation method. To be honest, if that works, I may leave it disconnected until a later date. Quite frankly, I have never had a music input in an airplane, and I don't think that I would miss it. Building E-AB, certification is not an issue, and I am getting anxious to get my 12 flying. I will try that today, and report back.........Tom

[Dave12]

If you do enjoy your ipod or mp3 while flying, try one of these:

http://www.amazon.com/Kensington-Red...ilter+for+ipod

I did not like the Flightcom either so it was replaced with the PS engineering unit sold by van's. It's an easy mod and works very well-no comparison to the Flightcom.

[todehnal]

Originally Posted by Dave12

If you do enjoy your ipod or mp3 while flying, try one of these:

http://www.amazon.com/Kensington-Red...ilter+for+ipod

I did not like the Flightcom either so it was replaced with the PS engineering unit sold by van's. It's an easy mod and works very well-no comparison to the Flightcom.

Thanks Dave. I'll keep that option open.....Tom

[RFSchaller]

Most of my flying is solo so I just use the Bose Aviation X aux input jack for my music. Sounds great. The music jack in my 12 seems to crackle a bit, so this was an easy solution.