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Clive J
Joined: 03 Nov 2007 Posts: 340 Location: UK
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Posted: Tue Mar 31, 2009 12:04 pm Post subject: Radio Noise traces |
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http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, www.ecofont.eu
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
[quote][b]
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Clive J
Joined: 03 Nov 2007 Posts: 340 Location: UK
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Posted: Tue Mar 31, 2009 2:08 pm Post subject: Radio Noise traces |
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http://groups.yahoo.com/group/jabiruengines/message/25762
From what I can see from the work Ralph has done the fixes are associated with:
Plug lead material, see the picture in the 'files' on the bottom link, the Bosch cable is shown. Link to Bosch leads on previous posts (aussie website).
Ferrite beads on the Coil HT, never heard of this or thought of it, seems two leads help a third makes no difference. Seems a great cheap and easy improvement.
Shielding the P, leads, we all probably know this but Ralph suggests shielding is grounded at the engine end.
I did the opposite thinking I might import some RF into the panel area, he also suggests using the shield as the ground for the mag switch, can't see what difference that would make so won't change mine, it does remove a wire so would do it this way in the future.
8mm Ferrite beads are the order of the day!
Then new plug leads!
Regards, Clive
_____________________________________________
From: James, Clive R
Sent: 31 March 2009 07:14
To: 'lightning-list(at)matronics.com'
Subject: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, www.ecofont.eu
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
[quote][b]
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Paul S
Joined: 01 Nov 2006 Posts: 1 Location: UK
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Posted: Tue Mar 31, 2009 4:11 pm Post subject: Radio Noise traces |
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The Bosch leads that Ralph constantly refers to on the Jab engine website are not available in the Northern hemisphere they are peculiar to Bosch Oz. James Hallam, who has a Twister with Jab 2200, has had a hell of a time with interference and I pointed him towards a UK company that manufactures plug leads for racing engines that employ the same technology used in the Bosch Oz leads. It made only a marginal difference, and not worth the £200 or so quid he paid.
I have tried ferrites on the ignition coil leads and that was a total waste of time.
I don’t know anyone who claims to have found a noise reduction from a grounded shield on the P lead. But removing RFI is a black art and what works in one installation can be hard to replicate in another.
I have come to the conclusion that there is no magic bullet. The best thing to do is what Jabiru do themselves and that is mount the aerial as far away from the engine as possible. Of course, if you can get a job at Jabiru or working for Jabiru, the RF disappears. Roger Lewis was deaf to it, I wonder if he can hear it now?
Cheers,
Paul
From: James, Clive R [mailto:clive.james(at)uk.bp.com]
Sent: 31 March 2009 07:38
To: lightning-list(at)matronics.com
Cc: Paul Sistern - Parts for Aircraft; Bob Panther
Subject: RE: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/message/25762
From what I can see from the work Ralph has done the fixes are associated with:
Plug lead material, see the picture in the 'files' on the bottom link, the Bosch cable is shown. Link to Bosch leads on previous posts (aussie website).
Ferrite beads on the Coil HT, never heard of this or thought of it, seems two leads help a third makes no difference. Seems a great cheap and easy improvement.
Shielding the P, leads, we all probably know this but Ralph suggests shielding is grounded at the engine end.
I did the opposite thinking I might import some RF into the panel area, he also suggests using the shield as the ground for the mag switch, can't see what difference that would make so won't change mine, it does remove a wire so would do it this way in the future.
8mm Ferrite beads are the order of the day!
Then new plug leads!
Regards, Clive
_____________________________________________
From: James, Clive R
Sent: 31 March 2009 07:14
To: 'lightning-list(at)matronics.com'
Subject: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, [url=file:///\\www.ecofont.eu]www.ecofont.eu[/url]
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
No virus found in this incoming message.
Checked by AVG - www.avg.com
03/30/09 17:56:00
[quote][b]
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wampam
Joined: 20 Oct 2008 Posts: 49
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Posted: Wed Apr 01, 2009 5:36 am Post subject: Radio Noise traces |
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I kind of got in late so I don’t know the full story of your noise problems.
· Do you here the noise when you’re transmitting or receiving?
· Does it sound like ignition noise or just a hash background?
[b]Walt Mefford[/b]
[b]GARMIN AT[/b]
[b]Manufacturing Test Engineering[/b]
[b](503) 391-3343[/b]
walt.mefford(at)garmin.com (walt.mefford(at)garmin.com)
[img]cid:image001.jpg(at)01C9B294.080F8AB0[/img]
[b]N881WP[/b]
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Paul Sistern - Parts for Aircraft
Sent: Tuesday, March 31, 2009 5:10 PM
To: 'James, Clive R'; lightning-list(at)matronics.com
Subject: RE: Radio Noise traces
The Bosch leads that Ralph constantly refers to on the Jab engine website are not available in the Northern hemisphere they are peculiar to Bosch Oz. James Hallam, who has a Twister with Jab 2200, has had a hell of a time with interference and I pointed him towards a UK company that manufactures plug leads for racing engines that employ the same technology used in the Bosch Oz leads. It made only a marginal difference, and not worth the £200 or so quid he paid.
I have tried ferrites on the ignition coil leads and that was a total waste of time.
I don’t know anyone who claims to have found a noise reduction from a grounded shield on the P lead. But removing RFI is a black art and what works in one installation can be hard to replicate in another.
I have come to the conclusion that there is no magic bullet. The best thing to do is what Jabiru do themselves and that is mount the aerial as far away from the engine as possible. Of course, if you can get a job at Jabiru or working for Jabiru, the RF disappears. Roger Lewis was deaf to it, I wonder if he can hear it now?
Cheers,
Paul
From: James, Clive R [mailto:clive.james(at)uk.bp.com]
Sent: 31 March 2009 07:38
To: lightning-list(at)matronics.com
Cc: Paul Sistern - Parts for Aircraft; Bob Panther
Subject: RE: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/message/25762
From what I can see from the work Ralph has done the fixes are associated with:
Plug lead material, see the picture in the 'files' on the bottom link, the Bosch cable is shown. Link to Bosch leads on previous posts (aussie website).
Ferrite beads on the Coil HT, never heard of this or thought of it, seems two leads help a third makes no difference. Seems a great cheap and easy improvement.
Shielding the P, leads, we all probably know this but Ralph suggests shielding is grounded at the engine end.
I did the opposite thinking I might import some RF into the panel area, he also suggests using the shield as the ground for the mag switch, can't see what difference that would make so won't change mine, it does remove a wire so would do it this way in the future.
8mm Ferrite beads are the order of the day!
Then new plug leads!
Regards, Clive
_____________________________________________
From: James, Clive R
Sent: 31 March 2009 07:14
To: 'lightning-list(at)matronics.com'
Subject: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, [url=file:///\\www.ecofont.eu]www.ecofont.eu[/url]
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
Quote: | http://www.matronics.com/Navigator?Lightning-List | 0123456789
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This e-mail and any attachments may contain confidential material for the sole use of the intended recipient. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of this e-mail or any attachment is prohibited. If you have received this e-mail in error, please contact the sender and delete all copies.
Thank you for your cooperation
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catalpaaviation(at)wideba Guest
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Posted: Wed Apr 01, 2009 5:52 pm Post subject: Radio Noise traces |
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Dear Paul etc,
The best, easiest and only solution after many hours of noise is to run the radio avionics straight to the battery. In my aircraft the avionics switch does not have a bus or anything complicated, run a wire from the battery to the fuse, to switch, to radio etc, back to the battery, and hay presto, no noise and great reception.
Anthony Morrison
J160 & Lightning
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Paul Sistern - Parts for Aircraft
Sent: Wednesday, 1 April 2009 10:10 AM
To: 'James, Clive R'; lightning-list(at)matronics.com
Subject: RE: Radio Noise traces
The Bosch leads that Ralph constantly refers to on the Jab engine website are not available in the Northern hemisphere they are peculiar to Bosch Oz. James Hallam, who has a Twister with Jab 2200, has had a hell of a time with interference and I pointed him towards a UK company that manufactures plug leads for racing engines that employ the same technology used in the Bosch Oz leads. It made only a marginal difference, and not worth the £200 or so quid he paid.
I have tried ferrites on the ignition coil leads and that was a total waste of time.
I don’t know anyone who claims to have found a noise reduction from a grounded shield on the P lead. But removing RFI is a black art and what works in one installation can be hard to replicate in another.
I have come to the conclusion that there is no magic bullet. The best thing to do is what Jabiru do themselves and that is mount the aerial as far away from the engine as possible. Of course, if you can get a job at Jabiru or working for Jabiru, the RF disappears. Roger Lewis was deaf to it, I wonder if he can hear it now?
Cheers,
Paul
From: James, Clive R [mailto:clive.james(at)uk.bp.com]
Sent: 31 March 2009 07:38
To: lightning-list(at)matronics.com
Cc: Paul Sistern - Parts for Aircraft; Bob Panther
Subject: RE: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/message/25762
From what I can see from the work Ralph has done the fixes are associated with:
Plug lead material, see the picture in the 'files' on the bottom link, the Bosch cable is shown. Link to Bosch leads on previous posts (aussie website).
Ferrite beads on the Coil HT, never heard of this or thought of it, seems two leads help a third makes no difference. Seems a great cheap and easy improvement.
Shielding the P, leads, we all probably know this but Ralph suggests shielding is grounded at the engine end.
I did the opposite thinking I might import some RF into the panel area, he also suggests using the shield as the ground for the mag switch, can't see what difference that would make so won't change mine, it does remove a wire so would do it this way in the future.
8mm Ferrite beads are the order of the day!
Then new plug leads!
Regards, Clive
_____________________________________________
From: James, Clive R
Sent: 31 March 2009 07:14
To: 'lightning-list(at)matronics.com'
Subject: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, [url=file:///\\www.ecofont.eu]www.ecofont.eu[/url]
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
Quote: | [b]http://www.matronics.com/Navigator?Lightning-List[b] | 0123456789
[quote][b]
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http://www.matronics.com/Navigator?Lightning-List |
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wampam
Joined: 20 Oct 2008 Posts: 49
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Posted: Thu Apr 02, 2009 5:32 am Post subject: Radio Noise traces |
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On a couple of occasions I have seen radios where the squelch was set to low allowing it to break on low level EMI.
[b]Walt Mefford[/b]
[b]GARMIN AT[/b]
[b]Manufacturing Test Engineering[/b]
[b](503) 391-3343[/b]
walt.mefford(at)garmin.com (walt.mefford(at)garmin.com)
[img]cid:image001.jpg(at)01C9B35C.527F5710[/img]
[b]N881WP[/b]
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Catalpa Aviation
Sent: Wednesday, April 01, 2009 7:46 PM
To: lightning-list(at)matronics.com
Subject: RE: RE: Radio Noise traces
Dear Paul etc,
The best, easiest and only solution after many hours of noise is to run the radio avionics straight to the battery. In my aircraft the avionics switch does not have a bus or anything complicated, run a wire from the battery to the fuse, to switch, to radio etc, back to the battery, and hay presto, no noise and great reception.
Anthony Morrison
J160 & Lightning
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Paul Sistern - Parts for Aircraft
Sent: Wednesday, 1 April 2009 10:10 AM
To: 'James, Clive R'; lightning-list(at)matronics.com
Subject: RE: Radio Noise traces
The Bosch leads that Ralph constantly refers to on the Jab engine website are not available in the Northern hemisphere they are peculiar to Bosch Oz. James Hallam, who has a Twister with Jab 2200, has had a hell of a time with interference and I pointed him towards a UK company that manufactures plug leads for racing engines that employ the same technology used in the Bosch Oz leads. It made only a marginal difference, and not worth the £200 or so quid he paid.
I have tried ferrites on the ignition coil leads and that was a total waste of time.
I don’t know anyone who claims to have found a noise reduction from a grounded shield on the P lead. But removing RFI is a black art and what works in one installation can be hard to replicate in another.
I have come to the conclusion that there is no magic bullet. The best thing to do is what Jabiru do themselves and that is mount the aerial as far away from the engine as possible. Of course, if you can get a job at Jabiru or working for Jabiru, the RF disappears. Roger Lewis was deaf to it, I wonder if he can hear it now?
Cheers,
Paul
From: James, Clive R [mailto:clive.james(at)uk.bp.com]
Sent: 31 March 2009 07:38
To: lightning-list(at)matronics.com
Cc: Paul Sistern - Parts for Aircraft; Bob Panther
Subject: RE: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/message/25762
From what I can see from the work Ralph has done the fixes are associated with:
Plug lead material, see the picture in the 'files' on the bottom link, the Bosch cable is shown. Link to Bosch leads on previous posts (aussie website).
Ferrite beads on the Coil HT, never heard of this or thought of it, seems two leads help a third makes no difference. Seems a great cheap and easy improvement.
Shielding the P, leads, we all probably know this but Ralph suggests shielding is grounded at the engine end.
I did the opposite thinking I might import some RF into the panel area, he also suggests using the shield as the ground for the mag switch, can't see what difference that would make so won't change mine, it does remove a wire so would do it this way in the future.
8mm Ferrite beads are the order of the day!
Then new plug leads!
Regards, Clive
_____________________________________________
From: James, Clive R
Sent: 31 March 2009 07:14
To: 'lightning-list(at)matronics.com'
Subject: Radio Noise traces
http://groups.yahoo.com/group/jabiruengines/files/Radio%20noise/
Clive R James
Harding OIM,
BP Exploration Operating Company Limited,
1 Wellheads Avenue, Dyce, Aberdeen AB21 7PB
Tel: +44 (0)1224 772982
Fax: +44 (0)1224 834896
e-mail: clive.james(at)bp.com
INK saving ECO SANS FONT used, [url=file:///\\www.ecofont.eu]www.ecofont.eu[/url]
BP Exploration Operating Company Limited, a company registered in England and Wales with the company number 305943 and VAT number GB365678995 and whose registered office is Chertsey Road, Sunbury on Thames, Middlesex TW16 7BP
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This e-mail and any attachments may contain confidential material for the sole use of the intended recipient. If you are not the intended recipient, please be aware that any disclosure, copying, distribution or use of this e-mail or any attachment is prohibited. If you have received this e-mail in error, please contact the sender and delete all copies.
Thank you for your cooperation
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