86M20J

ZERO corrosion under the antenna or anywhere else on my plane. Getting a new coax and antenna right now. Coax is being provided by the shop as they didn’t install a new coax when they put the 650 in. Either way, they are test flying it Friday and problem should be gone. Thanks for all the info.

Comm 2 antenna is fine. My numbers may be wrong on swr so don’t beat me up...Comm 1 (the bad one) possibly 12 at the radio. 4 near antenna

Turns out I need a new antenna. 28 days is the fastest I can get one. Anyone have one lying around they want to sell??

It started of course after the test flight to pick up the plane. It began on the way home from picking up the plane. We stopped at an airport halfway home and had an avionics shop take a look. He adjusted a setting and it worked great. Said the setting was set like you would set the older 650. I don’t know what he changed. I was brand new to ownership at the time. We have lowered the squelch break % and it has helped, but not cured it

I don’t know what all they did when they installed the new 650. It was a brand new 650 and they built a new tray for it and the radio stack.

Thank you for the reply. The shop has mentioned replacing the coax. Unfortunately it is not the shop the did the install. I bought the plane 10 months ago north of Detroit and had them do the install. I am in Mississippi. love the plane. 10 months in and have 120+hours in it. Trying to work out the bugs.

1986 M20J. I keep losing radio contact on trips. It seems to be getting worse. Garmin 650xi. Installed about a year ago. When I am close by a center or tower, I hear fine. Sometimes a little scratchy. My comm 2, old king works great. Have had the plane in the shop. They checked everything and it all checked out. They did lower the squelch break % and it helped, but it is not fixed. Long cross countries with imc, it sure is nice to be able to talk to someone. Any ideas? Shop wants to put new antenna on and re bond. Thank you.