---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sat 06/12/21: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:27 AM - Re: G-GIWT air tests (h&jeuropa) 2. 07:29 AM - Re: US Fly-In Interest? (h&jeuropa) 3. 08:02 AM - Re: Re: G-GIWT air tests (Alan Twigg) 4. 03:59 PM - Re: Re: G-GIWT air tests (Bud Yerly) 5. 04:00 PM - Re: Re: US Fly-In Interest? (Bud Yerly) ________________________________ Message 1 _____________________________________ Time: 07:27:17 AM PST US Subject: Europa-List: Re: G-GIWT air tests From: "h&jeuropa" Alan, The trim motor is located very close to the comm antenna if your antenna is located in the rudder flange per the manual. If the comm antenna is not well tuned, there may be excessive radiation from it that interferes with the trim motor. I'd suggest you check the standing wave ratio (SWR) of the comm antenna at different frequencies. You might try wrapping the trim motor in conductive foil (aluminum foil) to see if shielding it solves the problem. Ferrite sleeves often do not solve the problem as they are not universal and the ones that are readily available are not correct for our VHF frequencies. I tried a lot of ferrite sleeves when I had my Blue Mountain EFIS trying to solve problems with very little success. Jim Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502344#502344 ________________________________ Message 2 _____________________________________ Time: 07:29:16 AM PST US Subject: Europa-List: Re: US Fly-In Interest? From: "h&jeuropa" We've decoded to cancel this event. Jim & Heather Do not archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=502345#502345 ________________________________ Message 3 _____________________________________ Time: 08:02:02 AM PST US From: Alan Twigg Subject: Re: Europa-List: Re: G-GIWT air tests Thanks Jim, I put an antenna behind the cockpit in the roof, the ferrite sleeve seems to have fixed the problem, tommorrow I will fly to prove it. Alan Sent from my iPhone > On 12 Jun 2021, at 15:29, h&jeuropa wrote: > > > Alan, > The trim motor is located very close to the comm antenna if your antenna is located in the rudder flange per the manual. If the comm antenna is not well tuned, there may be excessive radiation from it that interferes with the trim motor. I'd suggest you check the standing wave ratio (SWR) of the comm antenna at different frequencies. > > You might try wrapping the trim motor in conductive foil (aluminum foil) to see if shielding it solves the problem. > > Ferrite sleeves often do not solve the problem as they are not universal and the ones that are readily available are not correct for our VHF frequencies. I tried a lot of ferrite sleeves when I had my Blue Mountain EFIS trying to solve problems with very little success. > > Jim > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=502344#502344 > > > > > > > > > ________________________________ Message 4 _____________________________________ Time: 03:59:30 PM PST US From: Bud Yerly Subject: RE: Europa-List: Re: G-GIWT air tests Alan, I recently installed a new Garmin 200 into my panel and I ran my coax across my FP-5 fuel flow and on certain frequencies 134 and up the FP-5 was a light show and finally went blank. If your trim indicator is in the panel, rerouting the com may help, shielding the trim indicator, if nearby the radio may be an area to look at if the coil doesn't work. Finally, if you run your com coax on the same side as the 5 wire trim bundle, that has caused problems before. As Jim said, ferrites can work but there may still be certain frequencies that interfere. A Faraday box does work. You don't need Mu metal as there isn't a lot of magnetic flux in the coax. That said, I have one of the old style needle type Mac trim indicators and it can be fluctuated by high current ops or the nearby new Garmin Com radio to my surprise. Keep plugging away. Bud Yerly -----Original Message----- From: owner-europa-list-server@matronics.com On Behalf Of Alan Twigg Sent: Saturday, June 12, 2021 11:01 AM Subject: Re: Europa-List: Re: G-GIWT air tests Thanks Jim, I put an antenna behind the cockpit in the roof, the ferrite sleeve seems to have fixed the problem, tommorrow I will fly to prove it. Alan Sent from my iPhone > On 12 Jun 2021, at 15:29, h&jeuropa wrote: > > > Alan, > The trim motor is located very close to the comm antenna if your antenna is located in the rudder flange per the manual. If the comm antenna is not well tuned, there may be excessive radiation from it that interferes with the trim motor. I'd suggest you check the standing wave ratio (SWR) of the comm antenna at different frequencies. > > You might try wrapping the trim motor in conductive foil (aluminum foil) to see if shielding it solves the problem. > > Ferrite sleeves often do not solve the problem as they are not universal and the ones that are readily available are not correct for our VHF frequencies. I tried a lot of ferrite sleeves when I had my Blue Mountain EFIS trying to solve problems with very little success. > > Jim > > > > > Read this topic online here: > > https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D502344%23502344&data=04%7C01%7C%7Cf81d5bfdcc07466d0eff08d92db3a3f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637591071834005806%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=HtKN5tPSut76HRtU7shin%2Fd8xkoVsuIPfk0o8Xqx8Cg%3D&reserved=0 > > > > > > > > > ________________________________ Message 5 _____________________________________ Time: 04:00:54 PM PST US From: Bud Yerly Subject: RE: Europa-List: Re: US Fly-In Interest? Sorry Jim, I would have liked to go but we are on Grandparent standby around those dates. Bud and Anita Yerly -----Original Message----- From: owner-europa-list-server@matronics.com On Behalf Of h&jeuropa Sent: Saturday, June 12, 2021 10:29 AM Subject: Europa-List: Re: US Fly-In Interest? We've decoded to cancel this event. Jim & Heather Do not archive Read this topic online here: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D502345%23502345&data=04%7C01%7C%7Cb3f3a73abfad4d27ceb508d92daef3d9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637591051699829105%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=STCipD79Dj2WZKl8S%2BHmy8TuhR3xv94%2B1VqIAvkh2BM%3D&reserved=0 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.