I've searched the archives and while I found some similar issues, they aren't identical to mine. Hoping someone can help me out as I've tried everything I know.
I've got a Sigtronic SPA-4S intercom that was working fine one day and severe static the next. Here are the events that took place...
Thanks!
I've got a Sigtronic SPA-4S intercom that was working fine one day and severe static the next. Here are the events that took place...
- Fired up the engine and noticed some intermittent popping sounds in my headset when idling.
- Didn't think too much about it but on run up, it became severely worse.
- I told the tower I was cancelling the flight due to a radio issue...he said I was coming through clear on his end. (So that tells me it's strictly an intercom issue.)
- Got it back to the hangar and checked every ground I could find but I couldn't find anything.
- Next day pulled it out of the hangar and the static on run up was still there but not as bad...as soon as I applied full power and started rolling down the runway, static started again.
- Landed and went back to hangar...checked different headsets in different jacks...nothing changed.
- Popped every breaker available to try and isolate it but nothing changed.
- Cranked it up the next day and quiet as could be on run up...no popping at all but as soon as I started down the runway, it became unbearable. Had to turn the intercom off.
- Seems vibration may be causing it?
- Talked with my A&P about it, he says it might be a mag issue but hard to know until he investigates
Thanks!
