---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 05/06/13: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:34 AM - Re: radio noise (bob noffs) 2. 09:47 AM - Surplus xponder antenna (Robert L. Nuckolls, III) 3. 10:04 AM - Re: Surplus xponder antenna (JOHN TIPTON) 4. 10:06 AM - Re: Surplus xponder antenna (Joel Ventura) 5. 10:28 AM - Re: Surplus xponder antenna (John Bright) 6. 11:46 AM - Re: Surplus xponder antenna (Robert L. Nuckolls, III) 7. 11:47 AM - Re: Surplus xponder antenna (SOLD) (Robert L. Nuckolls, III) 8. 11:58 AM - Re: Question (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 02:34:02 AM PST US Subject: Re: AeroElectric-List: radio noise From: bob noffs the radio is an icom i200 with an intercom setup. bob noffs On Sun, May 5, 2013 at 7:44 PM, David Lloyd wrote: > ** > 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 > > * > > * > > * > > href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List > href="http://forums.matronics.com">http://forums.matronics.com > href="http://www.matronics.com/contribution">http://www.matronics.com/c* > > * > > * > > ________________________________ Message 2 _____________________________________ Time: 09:47:46 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Surplus xponder antenna Emacs! New old stock surplus to my needs. First offer of $15 takes it. Bob . . . ________________________________ Message 3 _____________________________________ Time: 10:04:49 AM PST US From: "JOHN TIPTON" Subject: Re: AeroElectric-List: Surplus xponder antenna OK: Bob, if it's still available, I'll take it John ----- Original Message ----- Original Message ----- From: Robert L. Nuckolls, III To: aeroelectric-list@matronics.com Sent: Monday, May 06, 2013 5:46 PM Subject: AeroElectric-List: Surplus xponder antenna New old stock surplus to my needs. First offer of $15 takes it. Bob . . . ________________________________ Message 4 _____________________________________ Time: 10:06:30 AM PST US From: Joel Ventura Subject: Re: AeroElectric-List: Surplus xponder antenna ________________________________ Message 5 _____________________________________ Time: 10:28:50 AM PST US From: John Bright Subject: Re: AeroElectric-List: Surplus xponder antenna I take it.=0A=0A-=0AJohn Bright=0A=0A=0A>________________________________ =0A> From: "Robert L. Nuckolls, III" =0A>To: aeroelectric-list@matronics.com =0A>Sent: Monday, May 6, 2013 12:46 PM=0A> Subject: AeroElectric-List: Surplus xponder antenna=0A> =0A>=0A>=0A> =0A> =0A>New old stock surplus to my needs. First=0A>offer of $15 takes it.=0A> =0A>=0A>- Bob . . .=0A>=0A> ________________________________ Message 6 _____________________________________ Time: 11:46:36 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Surplus xponder antenna At 12:03 PM 5/6/2013, you wrote: >OK: Bob, if it's still available, I'll take it > Your response got here first. You got it. I've invoiced you on PayPal. Bob . . . ________________________________ Message 7 _____________________________________ Time: 11:47:13 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Surplus xponder antenna (SOLD) At 11:46 AM 5/6/2013, you wrote: >Emacs! > > >SOLD - Thanks for the responses guys! ________________________________ Message 8 _____________________________________ Time: 11:58:24 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: Question At 01:24 PM 5/6/2013, you wrote: >Hello Bob, > >I have a quick question- > >Why is it that a radio like a Garmin SL-30 >Nav/Com and a marker beacon like a PS >Engineering model, have two separate ground >wires each, i.e. one for the power ground and >one for the audio ground ' yet those wires end >up connecting at the same grounding point. > >I am curious as to why there has to be two wires >from each box that end up at the same grounding >point, instead of the manufacturer wiring these >two grounds up together internally in the >device, and then only using one ground wire? > >Many thanks, Not sure what you're referring to. Here's one of serveral wiring diagrams gleaned from an SL-30 installation manual: Emacs! In this case, I suspect that pins 13, 7 and 9 are all common inside the SL-30 but only pin 9 is used for attachment to ship's power ground. Pins 13 and 7 become a quasi-single point ground for the audio system as it relates to the SL-30. Are there other wiring diagrams that offer a more confusing picture? Bob . . . ------------------------------------------------------------------------------------- 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.