AeroElectric-List Digest Archive

Mon 03/28/16


Total Messages Posted: 9



Today's Message Index:
----------------------
 
     1. 06:27 AM - Re: fused or not...now keeping noise out..do caps work? (rich.ulmen@gmail.com)
     2. 09:30 AM - Re: fused or not...now keeping noise out..do caps work? (Bob Verwey)
     3. 03:15 PM - another switch question (Ken Ryan)
     4. 04:38 PM - Re: another switch question (Rene)
     5. 04:51 PM - Re: another switch question (Lyle Peterson)
     6. 05:55 PM - Re: another switch question (JOHN TIPTON)
     7. 07:55 PM - Re: another switch question (ashleysc@broadstripe.net)
     8. 08:00 PM - Re: another switch question (ashleysc@broadstripe.net)
     9. 09:17 PM - Re: another switch question (Ken Ryan)
 
 
 


Message 1


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    Time: 06:27:19 AM PST US
    Subject: Re: fused or not...now keeping noise out..do caps work?
    From: rich.ulmen@gmail.com
    Is that the actual size of the capacitor for that application? Rich Ulmen > On Mar 28, 2016, at 1:38 AM, Bob Verwey <bob.verwey@gmail.com> wrote: > > Bob, > In the same vein... > After having a new intercom fitted in my radio stack, I have developed a s erious amount of radio noise as soon as the rpm's hit the 2000 mark. The sq b utton has no effect on the severity of this noise. It is as if a source is t ransmitting to the radio! > > I am told that adding a 22000 microfarad cap across the power feed to the r adios will solve this problem. > > What says the brains trust? > > > >> On 27 March 2016 at 19:39, Robert L. Nuckolls, III <nuckolls.bob@aeroelec tric.com> wrote: >> At 07:33 AM 3/27/2016, you wrote: >>> thanks guys for the info. i am told it is to keep noise out of the ecu. >>> =C3=82 bob noffs >> >> That IS the legacy rationale for adding such things >> and it's a deeply rooted idea did >> a failure analysis on a modern, 100A alternator >> that came equipped from the factory with a 680uF >> electrolytic capacitor mounted right to the back >> of the alternator. >> >> >> <15a1d98e.jpg> >> >> I am quite certain that noise from this alternator on >> EMC laboratory equipment would not be materially >> reduced for having added the capacitor. I'd >> LOVE to see an EMC test report that illuminates >> the 'benefit'. >> >> I just purchased a spectrum analyzer that sweeps >> down to 1Hz and up to 2.4 Ghz. When I begin >> development testing on the next generation of >> PM alternator rectifier/regulators for B&C I will >> quantify the value of adding this component >> to our airplanes. >> >> >> >> Bob . . . >> > > > > -- > Best... > Bob Verwey >


    Message 2


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    Time: 09:30:53 AM PST US
    Subject: Re: fused or not...now keeping noise out..do caps work?
    From: Bob Verwey <bob.verwey@gmail.com>
    Rich, this is what was recommended by the avionics shop On Monday, March 28, 2016, <rich.ulmen@gmail.com> wrote: > Is that the actual size of the capacitor for that application? > > Rich Ulmen > > > On Mar 28, 2016, at 1:38 AM, Bob Verwey <bob.verwey@gmail.com > <javascript:_e(%7B%7D,'cvml','bob.verwey@gmail.com');>> wrote: > > Bob, > In the same vein... > After having a new intercom fitted in my radio stack, I have developed a > serious amount of radio noise as soon as the rpm's hit the 2000 mark. The > sq button has no effect on the severity of this noise. It is as if a sour ce > is transmitting to the radio! > > I am told that adding a 22000 microfarad cap across the power feed to the > radios will solve this problem. > > What says the brains trust? > > > On 27 March 2016 at 19:39, Robert L. Nuckolls, III < > nuckolls.bob@aeroelectric.com > <javascript:_e(%7B%7D,'cvml','nuckolls.bob@aeroelectric.com');>> wrote: > >> At 07:33 AM 3/27/2016, you wrote: >> >> thanks guys for the info. i am told it is to keep noise out of the ecu. >> =C3=82 bob noffs >> >> >> That IS the legacy rationale for adding such things >> and it's a deeply rooted idea did >> a failure analysis on a modern, 100A alternator >> that came equipped from the factory with a 680uF >> electrolytic capacitor mounted right to the back >> of the alternator. >> >> >> <15a1d98e.jpg> >> >> I am quite certain that noise from this alternator on >> EMC laboratory equipment would not be materially >> reduced for having added the capacitor. I'd >> LOVE to see an EMC test report that illuminates >> the 'benefit'. >> >> I just purchased a spectrum analyzer that sweeps >> down to 1Hz and up to 2.4 Ghz. When I begin >> development testing on the next generation of >> PM alternator rectifier/regulators for B&C I will >> quantify the value of adding this component >> to our airplanes. >> >> >> >> Bob . . . >> > > > -- > Best... > Bob Verwey > > -- Best... Bob Verwey


    Message 3


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    Time: 03:15:00 PM PST US
    From: Ken Ryan <keninalaska@gmail.com>
    Subject: another switch question
    I am curious about the function of the pictured "Engine Start" switch. It is a push button switch with four terminals on the back. Two of the terminals are normally open, two are normally closed. I can see how the normally open terminals could be used to drive a starter motor relay, but what would the typical use be for the normally closed terminals on an engine start switch? See attached pic.


    Message 4


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    Time: 04:38:06 PM PST US
    From: "Rene" <rene@felker.com>
    Subject: another switch question
    Just a guessground out one of the mags? Rene' 801-721-6080 From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken Ryan Sent: Monday, March 28, 2016 4:13 PM Subject: AeroElectric-List: another switch question I am curious about the function of the pictured "Engine Start" switch. It is a push button switch with four terminals on the back. Two of the terminals are normally open, two are normally closed. I can see how the normally open terminals could be used to drive a starter motor relay, but what would the typical use be for the normally closed terminals on an engine start switch? See attached pic.


    Message 5


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    Time: 04:51:32 PM PST US
    Subject: Re: another switch question
    From: Lyle Peterson <lyleap@centurylink.net>
    To remove power from anything not needed while cranking the engine. On 3/28/2016 6:36 PM, Rene wrote: > > Just a guessground out one of the mags? > > Rene' > > 801-721-6080 > > *From:*owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] *On Behalf Of > *Ken Ryan > *Sent:* Monday, March 28, 2016 4:13 PM > *To:* aeroelectric-list@matronics.com > *Subject:* AeroElectric-List: another switch question > > I am curious about the function of the pictured "Engine Start" switch. > It is a push button switch with four terminals on the back. Two of the > terminals are normally open, two are normally closed. I can see how > the normally open terminals could be used to drive a starter motor > relay, but what would the typical use be for the normally closed > terminals on an engine start switch? See attached pic. >


    Message 6


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    Time: 05:55:19 PM PST US
    Subject: Re: another switch question
    From: "JOHN TIPTON" <jmtipton@btopenworld.com>
    This looks like the 'Steinair' switch they sell, (which I'm keen on using on our -9a build) the connectors look like 1/8inch wide, are 'fast-on' PIDG connectors available, or should one solder. Regards John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=454284#454284


    Message 7


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    Time: 07:55:41 PM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: another switch question
    Hi Ken; That's a mighty rugged looking switch! I think the normally closed contacts =C2-would normally=C2-be used to turn off (temporarily) anything you di dn't want running while engaging the starter. Cheers!=C2-=C2- Stu. ----- Original Message ----- From: "Ken Ryan" <keninalaska@gmail.com> Sent: Monday, March 28, 2016 3:12:39 PM Subject: AeroElectric-List: another switch question I am curious about the function of the pictured "Engine Start" switch. It i s a push button switch with four terminals on the back. Two of the terminal s are normally open, two are normally closed. I can see how the normally op en terminals could be used to drive a starter motor relay, but what would t he typical use be for the normally closed terminals on an engine start swit ch? See attached pic.


    Message 8


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    Time: 08:00:19 PM PST US
    From: ashleysc@broadstripe.net
    Subject: Re: another switch question
    Hi Ken; I would like the mfg. and model number of that switch, please. Cheers!=C2-=C2- Stu. ----- Original Message ----- From: "Ken Ryan" <keninalaska@gmail.com> Sent: Monday, March 28, 2016 3:12:39 PM Subject: AeroElectric-List: another switch question I am curious about the function of the pictured "Engine Start" switch. It i s a push button switch with four terminals on the back. Two of the terminal s are normally open, two are normally closed. I can see how the normally op en terminals could be used to drive a starter motor relay, but what would t he typical use be for the normally closed terminals on an engine start swit ch? See attached pic.


    Message 9


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    Time: 09:17:53 PM PST US
    From: Ken Ryan <keninalaska@gmail.com>
    Subject: Re: another switch question
    It's made by Elewind. Here's a link: http://www.aliexpress.com/store/product/ELEWIND-22mm-1NO1NC-Momentary-push-button-With-ENGINE-START-symbol-PM221F-11-S-With-ENGINE-START/737142_1719523504.html On Mon, Mar 28, 2016 at 6:59 PM, <ashleysc@broadstripe.net> wrote: > Hi Ken; > I would like the mfg. and model number of that switch, please. > Cheers! Stu. > >




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