---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 07/13/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:32 AM - Re: Engine Electromagnetic Noise (joeing701@simnet.is) 2. 08:09 AM - Re: Engine Electromagnetic Noise (John Fasching) 3. 09:48 AM - Re: Engine Electromagnetic Noise (joeing701@simnet.is) ________________________________ Message 1 _____________________________________ Time: 12:32:37 AM PST US From: "joeing701@simnet.is" Subject: Re: RotaxEngines-List: Engine Electromagnetic Noise Hello John. Your Zulu headset has a noise activated microphone, so it could be picking up the sound in your cockpit at high rpm. It should have an adjustment screw to lower the sensitivity. Check with Lightspeed for this problem. Sometimes it is just the squelch setting in the intercom that you can adjust for this problem. Hope this helps. Johann ----- Upprunalegt skeyti ----- Fr: "John Fasching" Til: rotaxengines-list@matronics.com Sent: rijudagur, 12. jl, 2011 16:07:12 GMT +00:00 Monrovia Efni: RotaxEngines-List: Engine Electromagnetic Noise RV-12 w/ Rotax 921ULS operating normally. At lower rpm no abnormal noice in the headset. Upon takeoff lots of noise...crackling, spitting, arcing type noise. Radio turned off makes no difference, so it seems to be some radiation getting directly into the Zulu headset, perhaps via the intercom which is yet to be fully explored. When reducing throttle the noise disappears...its only at higher rpms. Have you encountered this? If so, what resolution was found? I can fly the plane and just put up with the noise which isn't all that terrible, but want to clear it up. No electrical oddities have been noted. Thanks for any tips. ________________________________ Message 2 _____________________________________ Time: 08:09:04 AM PST US From: "John Fasching" Subject: Re: RotaxEngines-List: Engine Electromagnetic Noise Johann - you hit it on the head ! I flew this morning with a non-noise reducing headset and there was no noise. I changed to Zulu ANR, fiddled with the squelch on the intercom, sensitivity on the ANR and problem gone ! Thanks for the help !!! JohnF ----- Original Message ----- From: Sent: Wednesday, July 13, 2011 1:29 AM Subject: Re: RotaxEngines-List: Engine Electromagnetic Noise > > > Hello John. > > Your Zulu headset has a noise activated microphone, so it could be picking > up the sound in your cockpit at high rpm. It should have an adjustment > screw to lower the sensitivity. > Check with Lightspeed for this problem. Sometimes it is just the squelch > setting in the intercom that you can adjust for this problem. Hope this > helps. > > Johann > > > ----- Upprunalegt skeyti ----- > Fr: "John Fasching" > Til: rotaxengines-list@matronics.com > Sent: rijudagur, 12. jl, 2011 16:07:12 GMT +00:00 Monrovia > Efni: RotaxEngines-List: Engine Electromagnetic Noise > > > RV-12 w/ Rotax 921ULS operating normally. At lower rpm no abnormal noice > in the headset. Upon takeoff lots of noise...crackling, spitting, arcing > type noise. Radio turned off makes no difference, so it seems to be some > radiation getting directly into the Zulu headset, perhaps via the intercom > which is yet to be fully explored. > > When reducing throttle the noise disappears...its only at higher rpms. > > Have you encountered this? If so, what resolution was found? I can fly the > plane and just put up with the noise which isn't all that terrible, but > want to clear it up. No electrical oddities have been noted. > > Thanks for any tips. > > > ________________________________ Message 3 _____________________________________ Time: 09:48:14 AM PST US From: "joeing701@simnet.is" Subject: Re: RotaxEngines-List: Engine Electromagnetic Noise Hello John. Glad I could help. I like the Lightspeed headsets. Makes all the difference with the ANR. Best regards, Johann G. Iceland. ----- Upprunalegt skeyti ----- Fr: "John Fasching" Til: rotaxengines-list@matronics.com Sent: Mivikudagur, 13. jl, 2011 15:05:30 GMT +00:00 Monrovia Efni: Re: RotaxEngines-List: Engine Electromagnetic Noise Johann - you hit it on the head ! I flew this morning with a non-noise reducing headset and there was no noise. I changed to Zulu ANR, fiddled with the squelch on the intercom, sensitivity on the ANR and problem gone ! Thanks for the help !!! JohnF ----- Original Message ----- From: Sent: Wednesday, July 13, 2011 1:29 AM Subject: Re: RotaxEngines-List: Engine Electromagnetic Noise > > > Hello John. > > Your Zulu headset has a noise activated microphone, so it could be picking > up the sound in your cockpit at high rpm. It should have an adjustment > screw to lower the sensitivity. > Check with Lightspeed for this problem. Sometimes it is just the squelch > setting in the intercom that you can adjust for this problem. Hope this > helps. > > Johann > > > ----- Upprunalegt skeyti ----- > Fr: "John Fasching" > Til: rotaxengines-list@matronics.com > Sent: rijudagur, 12. jl, 2011 16:07:12 GMT +00:00 Monrovia > Efni: RotaxEngines-List: Engine Electromagnetic Noise > > > RV-12 w/ Rotax 921ULS operating normally. At lower rpm no abnormal noice > in the headset. Upon takeoff lots of noise...crackling, spitting, arcing > type noise. Radio turned off makes no difference, so it seems to be some > radiation getting directly into the Zulu headset, perhaps via the intercom > which is yet to be fully explored. > > When reducing throttle the noise disappears...its only at higher rpms. > > Have you encountered this? If so, what resolution was found? I can fly the > plane and just put up with the noise which isn't all that terrible, but > want to clear it up. No electrical oddities have been noted. > > Thanks for any tips. > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.