kgmjeric
Joined: 28 Aug 2010
Posts: 3
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 Posted: Mon Aug 30, 2010 12:24 pm Post subject: noise in intercom |
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Taylorcraft 19 with electrice start, generator, nav lights, transponder, pseII intercom, strobes, narco 120 radio.
I just added the intercom to the plane. The headset plugs are not grounded as they are perfectly isolated in plastic mounts on wood in the wing. the wires are shielded and terminate at the unit only.
At low rpm the intercom LED will flash between red and green back and forth. at that time the system is unusable. many times at cruise rpm and lower rpm as well i will hear a rhythmic tick sound, couple a second.
previously i could hear my strobes squeal at low rpm but it was faint and the ground for them has been improved.
the pse box has a default circuit that only allows the co pilot to function when there may be a problem. My unit goes to this function when my radio is turned off. My radio doesnt receive and i have been using a hand held. but i must keep power to my narco or the led on the intercom goes a yellow ish color and defaults to co pilot. if i turn the power on the radio on the intercom functions great but I end up being interrupted with noise or trash it pics up.
any help would be great.
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