---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Mon 12/27/04: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:57 PM - Radio/Intercom interference with engine issue (N223RV@AOL.com) 2. 03:27 PM - Re: Radio/Intercom interference with engine issue (Scott R. Shook) ________________________________ Message 1 _____________________________________ Time: 02:57:45 PM PST US From: N223RV@AOL.com Subject: RV7-List: Radio/Intercom interference with engine issue rv-list@matronics.com, aeroelectric-list@matronics.com --> RV7-List message posted by: N223RV@aol.com I have an interesting issue. I am flying my friends RV-7, this is the second flight. I had the throttle basically full (breaking in the engine) and the radio progressively seemed to get worse (over a 515 minute period) with static when receiving transmissions from ATC. It got so bad, I could barely hear him. He said he had no issues hearing me. I told him I was going to come in for a full stop, pulled back the throttle, and could hear fine once again. So I called the controller and told him I was going to go around again and once I gave it over about 75% power, the radio once again had a bunch of static (only when receiving transmissions). The plane has a PS Engineering PM1000 intercom, Garmin 430 radio, and a Headsets Inc ANR in a Dave Clark 13.4 headset. It also has a Lightspeed electronic ignition on the right mag. I did a mag check in the air and it did not seem to make a difference. I pulled and reseated the headset plugs and that did not fix the issue. Does anyone have any ideas what to check? We had no issues on the first flight. Thanks in advance! -Mike Kraus N223RV RV-4 Flying N213RV RV-10 Tailcone Complete, working on wings ________________________________ Message 2 _____________________________________ Time: 03:27:44 PM PST US From: "Scott R. Shook" Subject: RE: RV7-List: Radio/Intercom interference with engine issue --> RV7-List message posted by: "Scott R. Shook" Mike Having had a very similar experience in a different situation; I found it to be a loose wire causing what sounds like static. Essentially what was happening at certain vibrations/frequencies I would hear the same static and sometimes there was even complete loss - it actually was a loose wire partially disconnecting/connecting very quickly. I would suggest tracing all the way from the headset jacks to the radio before having someone pull the radio and look at it. I think you may find the solution to be a simple one if it is only happening at certain engine speeds. Just my 2 cents... Scott HS Complete!!! VS being skinned!!! -----Original Message----- From: owner-rv7-list-server@matronics.com [mailto:owner-rv7-list-server@matronics.com] On Behalf Of N223RV@AOL.com rv-list@matronics.com; aeroelectric-list@matronics.com Subject: RV7-List: Radio/Intercom interference with engine issue --> RV7-List message posted by: N223RV@aol.com I have an interesting issue. I am flying my friends RV-7, this is the second flight. I had the throttle basically full (breaking in the engine) and the radio progressively seemed to get worse (over a 515 minute period) with static when receiving transmissions from ATC. It got so bad, I could barely hear him. He said he had no issues hearing me. I told him I was going to come in for a full stop, pulled back the throttle, and could hear fine once again. So I called the controller and told him I was going to go around again and once I gave it over about 75% power, the radio once again had a bunch of static (only when receiving transmissions). The plane has a PS Engineering PM1000 intercom, Garmin 430 radio, and a Headsets Inc ANR in a Dave Clark 13.4 headset. It also has a Lightspeed electronic ignition on the right mag. I did a mag check in the air and it did not seem to make a difference. I pulled and reseated the headset plugs and that did not fix the issue. Does anyone have any ideas what to check? We had no issues on the first flight. Thanks in advance! -Mike Kraus N223RV RV-4 Flying N213RV RV-10 Tailcone Complete, working on wings advertising on the Matronics Forums.