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Intermittent Alternator Noise

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jmjones2000(at)mindspring
Guest

Posted: Fri Apr 29, 2016 10:25 am Post subject: Intermittent Alternator Noise

Need help troubleshooting an intermittent noise. 



My aircraft is wired per Bob's 13-8 diagram. When the primary alternator (60A Lycoming alternator) is running, all is well. Everything works, the EFII programmer reads 14.3-14.5 volts and the Dynon EMS-D180 reads 13.8. 



When I turn off the main alternator and test the B&C-410H there is an intermittent noise (wine and static in the intercom).  Associated with the noise is a low voltage indication on the Dynon (11.5 volts) but the EFII programmer still reads 14.3-14.5 volts. After a few minutes, the noise goes away and the voltage comes up to 13.8 on the Dynon. The situation will continue to cycle with no predictable pattern. Every time I get the noise, the Dynon display voltage drops and every time the noise goes away the Dynon display voltage rises. 



After performing an hour long test flight on the B&C alternator and watching this cycle, I shut the aircraft down and a fluke meter showed 12.9 volts on the battery. 



The regulators are both solid state VR166 as Bob suggests in the Aeroelectric Connection. 



Thoughts or suggestions?



Thanks!



Justin

JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Fri Apr 29, 2016 11:09 am Post subject: Intermittent Alternator Noise

What's a 'fluke meter'



John



Sent from my iPad



     ----x--O--x----



 	  Quote: 	
		   On 29 Apr 2016, at 07:18 pm, Justin Jones <jmjones2000(at)mindspring.com> wrote:

 

 

 

 Need help troubleshooting an intermittent noise. 

 

 My aircraft is wired per Bob's 13-8 diagram. When the primary alternator (60A Lycoming alternator) is running, all is well. Everything works, the EFII programmer reads 14.3-14.5 volts and the Dynon EMS-D180 reads 13.8. 

 

 When I turn off the main alternator and test the B&C-410H there is an intermittent noise (wine and static in the intercom).  Associated with the noise is a low voltage indication on the Dynon (11.5 volts) but the EFII programmer still reads 14.3-14.5 volts. After a few minutes, the noise goes away and the voltage comes up to 13.8 on the Dynon. The situation will continue to cycle with no predictable pattern. Every time I get the noise, the Dynon display voltage drops and every time the noise goes away the Dynon display voltage rises. 

 

 After performing an hour long test flight on the B&C alternator and watching this cycle, I shut the aircraft down and a fluke meter showed 12.9 volts on the battery. 

 

 The regulators are both solid state VR166 as Bob suggests in the Aeroelectric Connection. 

 

 Thoughts or suggestions?

 

 Thanks!

 

 Justin

jmjones2000(at)mindspring
Guest

Posted: Fri Apr 29, 2016 11:22 am Post subject: Intermittent Alternator Noise

 	  Quote: 	
		   On Apr 29, 2016, at 11:07, John Tipton <jmtipton(at)btopenworld.com> wrote:

 

 

 

 What's a 'fluke meter'

 

 John

 

 Sent from my iPad

 

     ----x--O--x----


	


It is a Fluke brand digital multimeter.



Justin



 	  Quote: 	
		   

> On 29 Apr 2016, at 07:18 pm, Justin Jones <jmjones2000(at)mindspring.com> wrote:

> 

> 

> 

> Need help troubleshooting an intermittent noise. 

> 

> My aircraft is wired per Bob's 13-8 diagram. When the primary alternator (60A Lycoming alternator) is running, all is well. Everything works, the EFII programmer reads 14.3-14.5 volts and the Dynon EMS-D180 reads 13.8. 

> 

> When I turn off the main alternator and test the B&C-410H there is an intermittent noise (wine and static in the intercom).  Associated with the noise is a low voltage indication on the Dynon (11.5 volts) but the EFII programmer still reads 14.3-14.5 volts. After a few minutes, the noise goes away and the voltage comes up to 13.8 on the Dynon. The situation will continue to cycle with no predictable pattern. Every time I get the noise, the Dynon display voltage drops and every time the noise goes away the Dynon display voltage rises. 

> 

> After performing an hour long test flight on the B&C alternator and watching this cycle, I shut the aircraft down and a fluke meter showed 12.9 volts on the battery. 

> 

> The regulators are both solid state VR166 as Bob suggests in the Aeroelectric Connection. 

> 

> Thoughts or suggestions?

> 

> Thanks!

> 

> Justin

lyleapgmc

Joined: 19 Feb 2014
Posts: 57

Posted: Fri Apr 29, 2016 11:26 am Post subject: Intermittent Alternator Noise

Fluke is a brand of a series of multi-meters usually considered to be of 

high quality.

On 4/29/2016 2:07 PM, John Tipton wrote:

 	  Quote: 	
		   



 What's a 'fluke meter'



 John



 Sent from my iPad



       ----x--O--x----



> On 29 Apr 2016, at 07:18 pm, Justin Jones <jmjones2000(at)mindspring.com> wrote:

>

> 

>

> Need help troubleshooting an intermittent noise.

>

> My aircraft is wired per Bob's 13-8 diagram. When the primary alternator (60A Lycoming alternator) is running, all is well. Everything works, the EFII programmer reads 14.3-14.5 volts and the Dynon EMS-D180 reads 13.8.

>

> When I turn off the main alternator and test the B&C-410H there is an intermittent noise (wine and static in the intercom).  Associated with the noise is a low voltage indication on the Dynon (11.5 volts) but the EFII programmer still reads 14.3-14.5 volts. After a few minutes, the noise goes away and the voltage comes up to 13.8 on the Dynon. The situation will continue to cycle with no predictable pattern. Every time I get the noise, the Dynon display voltage drops and every time the noise goes away the Dynon display voltage rises.

>

> After performing an hour long test flight on the B&C alternator and watching this cycle, I shut the aircraft down and a fluke meter showed 12.9 volts on the battery.

>

> The regulators are both solid state VR166 as Bob suggests in the Aeroelectric Connection.

>

> Thoughts or suggestions?

>

> Thanks!

>

> Justin

>

rene(at)felker.com
Guest

Posted: Fri Apr 29, 2016 12:12 pm Post subject: Intermittent Alternator Noise

It is what you call a bad multi-meter when you are in mixed company.  



Do not archive.



Rene'

801-721-6080

--

lyleapgmc

Joined: 19 Feb 2014
Posts: 57

Posted: Fri Apr 29, 2016 2:44 pm Post subject: Intermittent Alternator Noise

It is a meter that measures the number of flukes in a given period of time.

On 4/29/2016 3:10 PM, Rene wrote:

[quote] 



 It is what you call a bad multi-meter when you are in mixed company.  



 Do not archive.



 Rene'

 801-721-6080

 --

halbenjamin101(at)gmail.c
Guest

Posted: Fri Apr 29, 2016 4:07 pm Post subject: Intermittent Alternator Noise

Fluke is a good meter....Sorta like a Simpson meter was before Bart came along!

Sent from my iPad

[quote] On Apr 29, 2016, at 6:43 PM, Lyle Peterson <lyleap(at)centurylink.net> wrote:

 It is a meter that measures the number of flukes in a given period of time.

> On 4/29/2016 3:10 PM, Rene wrote:

> 

> 

> It is what you call a bad multi-meter when you are in mixed company.  

> 

> Do not archive.

> 

> Rene'

> 801-721-6080

> 

> 

> --

user9253

Joined: 28 Mar 2008
Posts: 1927
Location: Riley TWP Michigan

Posted: Fri Apr 29, 2016 6:37 pm Post subject: Re: Intermittent Alternator Noise

The vast majority of electrical problems are caused by bad connections.  So check every connection for corrosion and tightness.

  Try interchanging the two voltage regulators to see what happens.

_________________
Joe Gores

ngeorge(at)continentalmot
Guest

Posted: Sat Apr 30, 2016 8:09 am Post subject: Intermittent Alternator Noise

Now that's funny...



Neal George

Sent from my iPhone



[quote] On Apr 30, 2016, at 2:11 AM, Hal Benjamin <halbenjamin101(at)gmail.com> wrote:

 

 

 

 Fluke is a good meter....Sorta like a Simpson meter was before Bart came along!

 

 Sent from my iPad

 

> On Apr 29, 2016, at 6:43 PM, Lyle Peterson <lyleap(at)centurylink.net> wrote:

> 

> 

> 

> It is a meter that measures the number of flukes in a given period of time.

> 

> 

>> On 4/29/2016 3:10 PM, Rene wrote:

>> 

>> 

>> It is what you call a bad multi-meter when you are in mixed company.  

>> 

>> Do not archive.

>> 

>> Rene'

>> 801-721-6080

>> 

>> 

>> --

JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Sat Apr 30, 2016 11:15 am Post subject: Intermittent Alternator Noise

What's a 'Simpson meter'



John

Sent from my iPad



     ----x--O--x----



[quote] On 30 Apr 2016, at 05:08 pm, Neal George <ngeorge(at)continentalmotors.aero> wrote:

 

 

 

 Now that's funny...

 

 Neal George

 Sent from my iPhone

 

> On Apr 30, 2016, at 2:11 AM, Hal Benjamin <halbenjamin101(at)gmail.com> wrote:

> 

> 

> 

> Fluke is a good meter....Sorta like a Simpson meter was before Bart came along!

> 

> Sent from my iPad

> 

>> On Apr 29, 2016, at 6:43 PM, Lyle Peterson <lyleap(at)centurylink.net> wrote:

>> 

>> 

>> 

>> It is a meter that measures the number of flukes in a given period of time.

>> 

>> 

>>> On 4/29/2016 3:10 PM, Rene wrote:

>>> 

>>> 

>>> It is what you call a bad multi-meter when you are in mixed company.  

>>> 

>>> Do not archive.

>>> 

>>> Rene'

>>> 801-721-6080

>>> 

>>> 

>>> --

lyleapgmc

Joined: 19 Feb 2014
Posts: 57

Posted: Sat Apr 30, 2016 11:43 am Post subject: Intermittent Alternator Noise

Another brand of meter.  The one I have is an analog meter.  It is about 

3" x 6" x 8" and used those old fashioned carbon zinc batteries.  

Alkaline replacements work.  They were also considered good meters in 

their time.  I don't know if Simpson still makes any measuring equipment.



It won't count the number of the Simpson's appearances on TV because I 

change the channel before they get to the introductions.

On 4/30/2016 2:13 PM, John Tipton wrote:

[quote] 



 What's a 'Simpson meter'



 John

 Sent from my iPad



       ----x--O--x----



> On 30 Apr 2016, at 05:08 pm, Neal George <ngeorge(at)continentalmotors.aero> wrote:

>

> 

>

> Now that's funny...

>

> Neal George

> Sent from my iPhone

>

>> On Apr 30, 2016, at 2:11 AM, Hal Benjamin <halbenjamin101(at)gmail.com> wrote:

>>

>> 

>>

>> Fluke is a good meter....Sorta like a Simpson meter was before Bart came along!

>>

>> Sent from my iPad

>>

>>> On Apr 29, 2016, at 6:43 PM, Lyle Peterson <lyleap(at)centurylink.net> wrote:

>>>

>>> 

>>>

>>> It is a meter that measures the number of flukes in a given period of time.

>>>

>>>

>>>> On 4/29/2016 3:10 PM, Rene wrote:

>>>> 

>>>>

>>>> It is what you call a bad multi-meter when you are in mixed company.  

>>>>

>>>> Do not archive.

>>>>

>>>> Rene'

>>>> 801-721-6080

>>>>

>>>>

>>>> --

kjashton(at)vnet.net
Guest

Posted: Sat Apr 30, 2016 1:08 pm Post subject: Intermittent Alternator Noise

Ha!   http://www.simpsonelectric.com

 	  Quote: 	
		   On Apr 30, 2016, at 3:13 PM, John Tipton <jmtipton(at)btopenworld.com> wrote:

 

 

 

 What's a 'Simpson meter?

>> 

>> Fluke is a good meter....Sorta like a Simpson meter was before Bart came along!

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