---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 05/05/13: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:48 PM - radio noise (bob noffs) 2. 05:19 PM - Re: radio noise (Ed Holyoke) 3. 05:45 PM - Re: radio noise (David Lloyd) ________________________________ Message 1 _____________________________________ Time: 04:48:58 PM PST US Subject: AeroElectric-List: radio noise From: bob noffs i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple hrs. ago my radio had no unwanted noise. but no more. while taxiing or in flight at rpm below about 2000 the radio is quiet. at 2800 rpm the static is constant. sounds like you are on an fm frequency with no station. there is no whine or change in sound of the noise as rpm increases or decreases. what does happen as rpm is dropped is that the noise becomes more and more intermittant and less frequent until it disappears.the noise disappears when i receive a transmission. as i have a wood and cloth plane i have a forest of tabs for all my ground wires. coming home from the airport i was thinking the rpm where the noise starts is close to where the alternator kicks in. noise pitch is not related to rpm though. any ideas why this would just start and what may be the cause? any ideas appreciated. bob noffs ________________________________ Message 2 _____________________________________ Time: 05:19:08 PM PST US From: Ed Holyoke Subject: Re: AeroElectric-List: radio noise Sounds like you're breaking squelch. Try adjusting it up a bit. Ed On 5/5/2013 4:47 PM, bob noffs wrote: > i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple > hrs. ago my radio had no unwanted noise. but no more. > while taxiing or in flight at rpm below about 2000 the radio is > quiet. at 2800 rpm the static is constant. sounds like you are on an > fm frequency with no station. there is no whine or change in sound of > the noise as rpm increases or decreases. what does happen as rpm is > dropped is that the noise becomes more and more intermittant and less > frequent until it disappears.the noise disappears when i receive a > transmission. > as i have a wood and cloth plane i have a forest of tabs for all my > ground wires. coming home from the airport i was thinking the rpm > where the noise starts is close to where the alternator kicks in. > noise pitch is not related to rpm though. > any ideas why this would just start and what may be the cause? > any ideas appreciated. > bob noffs > * > > > * ________________________________ Message 3 _____________________________________ Time: 05:45:13 PM PST US From: "David Lloyd" Subject: Re: AeroElectric-List: radio noise What kind of radio or navigator....?? ....some of them have built-in staged squelch bands and one or more may need sw adjustment if internal set... ------------------------------------------------------------------------- ------- ----- Original Message ----- From: Ed Holyoke To: aeroelectric-list@matronics.com Sent: Sunday, May 05, 2013 5:18 PM Subject: Re: AeroElectric-List: radio noise Sounds like you're breaking squelch. Try adjusting it up a bit. Ed On 5/5/2013 4:47 PM, bob noffs wrote: i have about 65 hrs on my dakota hawk / 3300 jab. up until a couple hrs. ago my radio had no unwanted noise. but no more. while taxiing or in flight at rpm below about 2000 the radio is quiet. at 2800 rpm the static is constant. sounds like you are on an fm frequency with no station. there is no whine or change in sound of the noise as rpm increases or decreases. what does happen as rpm is dropped is that the noise becomes more and more intermittant and less frequent until it disappears.the noise disappears when i receive a transmission. as i have a wood and cloth plane i have a forest of tabs for all my ground wires. coming home from the airport i was thinking the rpm where the noise starts is close to where the alternator kicks in. noise pitch is not related to rpm though. any ideas why this would just start and what may be the cause? any ideas appreciated. bob noffs ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.