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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Subject: | Re: fused or not...now keeping noise out..do caps work? |
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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Subject: | Re: fused or not...now keeping noise out..do caps work? |
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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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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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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Subject: | Re: another switch question |
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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Subject: | Re: another switch question |
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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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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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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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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