takair Posted November 29, 2020 Report Share Posted November 29, 2020 17 minutes ago, 0TreeLemur said: I looked and the inverter is grounded on a lug right below the pilot-side control column shaft, on a screw that penetrates the steel tubing. There are about three other things grounded there too. Here's a photo of the really nice looking TC100 with the sliced wire. Why they did this blows me away. PM sent Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted November 30, 2020 Author Report Share Posted November 30, 2020 Another banner day at the hangar! As @takair suggested, I moved the TC100 ground point, and my noise problem disappeared. I suspect it was a bad ground connection. I cut off the crimp-on eye, extended the wire and crimped on a new eye. System is so quiet, I couldn't tell it was on without doing a radio check. Wow. Gone are the whine and squeals! Thanks to all for their input. Big shout out to @Baker Avionics @takair, and @PT20J. 4 Quote Link to comment Share on other sites More sharing options...
carusoam Posted November 30, 2020 Report Share Posted November 30, 2020 11 minutes ago, 0TreeLemur said: Another banner day at the hangar! As @takair suggested, I moved the TC100 ground point, and my noise problem disappeared. I suspect it was a bad ground connection. I cut off the crimp-on eye, extended the wire and crimped on a new eye. System is so quiet, I couldn't tell it was on without doing a radio check. Wow. Gone are the whine and squeals! Thanks to all for their input. Big shout out to @Baker Avionics @takair, and @PT20J. This week’s Sharpest Knives in the Draw award goes to... Greg, Rob, and Skip! Solving the errant noise challenges we often get in our audio systems... These guys put in a lot of work with aging machinery... just like we have... and then share their knowledge here! Go MS! Best regards, -a- 1 1 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted November 30, 2020 Report Share Posted November 30, 2020 I was thinking about this thread today - I was flying today and someone somewhere had the most gawd awful squeal on their radio. They were talking but no one could hear them and everyone within 50 miles had headaches with that squeal in our ears! Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted November 30, 2020 Author Report Share Posted November 30, 2020 1 hour ago, aviatoreb said: I was thinking about this thread today - I was flying today and someone somewhere had the most gawd awful squeal on their radio. They were talking but no one could hear them and everyone within 50 miles had headaches with that squeal in our ears! Sounds like they have a mic jack that isn't properly insulated! 2 Quote Link to comment Share on other sites More sharing options...
Baker Avionics Posted November 30, 2020 Report Share Posted November 30, 2020 16 hours ago, carusoam said: This week’s Sharpest Knives in the Draw award goes to... Greg, Rob, and Skip! Solving the errant noise challenges we often get in our audio systems... These guys put in a lot of work with aging machinery... just like we have... and then share their knowledge here! Go MS! Best regards, -a- Great to hear! Sorry I was offline for a few days. Fred, exciting news!!!!!!!! I am still sending you the proper hardware for your rear mic jack so it will be correct. 1 Quote Link to comment Share on other sites More sharing options...
aviatoreb Posted November 30, 2020 Report Share Posted November 30, 2020 17 hours ago, 0TreeLemur said: Sounds like they have a mic jack that isn't properly insulated! I guess so! Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted November 30, 2020 Author Report Share Posted November 30, 2020 1 hour ago, aviatoreb said: I guess so! It's really embarrassing to be that guy. I used to be that guy. Glad it's someone else now... 1 Quote Link to comment Share on other sites More sharing options...
Baker Avionics Posted December 3, 2020 Report Share Posted December 3, 2020 On 11/30/2020 at 3:38 PM, 0TreeLemur said: It's really embarrassing to be that guy. I used to be that guy. Glad it's someone else now... You haven't met Pete yet have you? Lol Quote Link to comment Share on other sites More sharing options...
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