BobbyPaulk(at)comcast.net
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 Posted: Tue Dec 03, 2013 6:35 am Post subject: Interference |
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Bob
I tried to reach you on the website but it still is not working. ( for me anyway )
I sent you an e-mail and I don't know if you received it or not.
Here goes again.
I read your article on "Understanding DO-160" in Dec. 2013 Kitplanes.
About a year ago I was riding shotgun ( right seat observer ) for a friend in his C-172 SP. He was trying to stay current on instruments and we were shooting ILS's. He is a retired fighter pilot and had the cross hairs centered on the approach. All of a sudden both the vertical and horizontal bars deflected like the instrument lost power . About the time the bars hit the stops they returned to the centered position as if noting happened. It started over and over with a cadence or timing. I took off my headset and heard his phone ( in his shirt pocket ) ringing in sync with the bars moving.
I think a lot of testing is needed before electronic devices are allowed on aircraft. Being an old ham operator I know that transmitters emit harmonics that can interfere with items that are no where near their own freg.
I hope the airlines electronics are better shielded than the 40 yr old C-172 we were flying.
My $.02
Bobby Paulk
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