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Radio Interference

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mike(at)vision499.com
Guest

Posted: Wed Mar 27, 2024 9:30 pm Post subject: Radio Interference

Hello

I have a LOM M332 aircraft engine with 2 factory magnetos and an MGL V16 radio.

Antenna is copper foil with balun epoxied into the VS

There are no filters installed.

While listening to ATIS (118.1) there is a ticking sound that is linked to the right magneto, it goes away when right mag is switched off.

No noise when running only on left mag 

While listening to ATIS I can also hear static that is not there on the other frequencies 

I cannot be 100% certain but I think the noise is new.

This noise is not present when listening to Tower (121.9) or other frequencies.

Any ideas on what could cause this

 

Thanks

 

Mike

 

 

Mike Pienaar

mike(at)vision499.com (ike(at)vision499.com)

Home: +1 250-999-8121

Mike cell: +1 250-885-0554

1-1100 Tulip Ave, Victoria, BC, V8Z 0A2

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sjbeaver(at)gmail.com
Guest

Posted: Thu Mar 28, 2024 4:52 am Post subject: Radio Interference

A few thoughts:

1) The right mag is equipped with an external starting device, either a buzzer or a SlickStart presumably. I would be inclined to carefully inspect the shielding of the wiring related to that. The HT leads and plugs also need careful inspection of course. A loose cap, a corroded lead etc may cause a spark to occur where it shouldn't and so generate a tick. 

2) Can you tell if you hear one tick per revolution of one tick per four revolutions? That would tell you whether you are looking for a primary side, or an HT/plug related issue



3) Are your 'P' leads long enough to swap from side to side? Doing so would again isolate the issue to the starter system and wiring, or the magneto.



I suspect you are going to have to narrow things down by swapping/replacing/inspecting.

Steve-- Stephen Beaver

Als ik kanTel: 614-937 4189





 

  	  Quote: 	
		  On Mar 28, 2024, at 1:29 AM, <mike(at)vision499.com (mike(at)vision499.com)> <mike(at)vision499.com (mike(at)vision499.com)> wrote:

Hello

I have a LOM M332 aircraft engine with 2 factory magnetos and an MGL V16 radio.

Antenna is copper foil with balun epoxied into the VS

There are no filters installed.

While listening to ATIS (118.1) there is a ticking sound that is linked to the right magneto, it goes away when right mag is switched off.

No noise when running only on left mag 

While listening to ATIS I can also hear static that is not there on the other frequencies 

I cannot be 100% certain but I think the noise is new.

This noise is not present when listening to Tower (121.9) or other frequencies.

Any ideas on what could cause this

 

Thanks

 

Mike

 

 

Mike Pienaar

mike(at)vision499.com (ike(at)vision499.com)

Home: +1 250-999-8121

Mike cell: +1 250-885-0554

1-1100 Tulip Ave, Victoria, BC, V8Z 0A2

- The Matronics Lom-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Lom-List

mikepienaar09(at)gmail.co
Guest

Posted: Wed Apr 03, 2024 1:16 pm Post subject: Radio Interference

Thank you very much for the input, on my installation the slickstart is on the left mag looking forward. I will start by swapping the “P” leads, did not think of that, will let you know

Keep well

 

Mike

 

From: owner-lom-list-server(at)matronics.com <owner-lom-list-server(at)matronics.com> On Behalf Of sjbeaver

Sent: Thursday, March 28, 2024 5:52 AM

To: Lom-List Digest Server <lom-list(at)matronics.com>

Subject: Re: Radio Interference

 

A few thoughts:

 



1) The right mag is equipped with an external starting device, either a buzzer or a SlickStart presumably. I would be inclined to carefully inspect the shielding of the wiring related to that. The HT leads and plugs also need careful inspection of course. A loose cap, a corroded lead etc may cause a spark to occur where it shouldn't and so generate a tick.

 



2) Can you tell if you hear one tick per revolution of one tick per four revolutions? That would tell you whether you are looking for a primary side, or an HT/plug related issue



 



3) Are your 'P' leads long enough to swap from side to side? Doing so would again isolate the issue to the starter system and wiring, or the magneto.



 



I suspect you are going to have to narrow things down by swapping/replacing/inspecting.

Steve

-- 

Stephen Beaver



Als ik kan

Tel: 614-937 4189

 	  Quote: 	
		  

On Mar 28, 2024, at 1:29 AM, <mike(at)vision499.com (mike(at)vision499.com)> <mike(at)vision499.com (mike(at)vision499.com)> wrote:



 

Hello



I have a LOM M332 aircraft engine with 2 factory magnetos and an MGL V16 radio.



Antenna is copper foil with balun epoxied into the VS



There are no filters installed.



While listening to ATIS (118.1) there is a ticking sound that is linked to the right magneto, it goes away when right mag is switched off.



No noise when running only on left mag 



While listening to ATIS I can also hear static that is not there on the other frequencies 



I cannot be 100% certain but I think the noise is new.



This noise is not present when listening to Tower (121.9) or other frequencies.



Any ideas on what could cause this



 



Thanks



 



Mike



 



 



Mike Pienaar



mike(at)vision499.com (ike(at)vision499.com)



Home: +1 250-999-8121



Mike cell: +1 250-885-0554



1-1100 Tulip Ave, Victoria, BC, V8Z 0A2

- The Matronics Lom-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Lom-List

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