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Iron filings in a speaker
Rather stupidly, I left the rear speaker in place when the old Rover was
having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. -- *The colder the X-ray table, the more of your body is required on it * Dave Plowman London SW To e-mail, change noise into sound. |
Iron filings in a speaker
Dave Plowman (News) wrote:
Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. plasticene has worked for me once or twice. also vaseline on a card followed by alcohol to get the grease out its possble that compressed gas/air might blow it out as well. I assume the spider is still intact? -- Ineptocracy (in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers. |
Iron filings in a speaker
The Natural Philosopher wrote :
Dave Plowman (News) wrote: Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. plasticene has worked for me once or twice. also vaseline on a card followed by alcohol to get the grease out its possble that compressed gas/air might blow it out as well. I assume the spider is still intact? A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
Iron filings in a speaker
In message , "Dave Plowman (News)"
writes Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. If you have access, try a conventional sewing needle. The metal particles may prefer the induced magnetism at the needle point. Never tried it with a speaker magnet but it used to work with moving coil instruments when I was an apprentice:-) regards -- Tim Lamb |
Iron filings in a speaker
On 21/08/2012 20:42, Harry Bloomfield wrote:
A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? |
Iron filings in a speaker
It happens that Andy Champ formulated :
On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? Something like that! -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
Iron filings in a speaker
Andy Champ wrote:
On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? in a nut shell. IF its stronger than the speaker magnet .. -- Ineptocracy (in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers. |
Iron filings in a speaker
On 22/08/2012 7:29 a.m., Dave Plowman (News) wrote:
Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. If it's a good speaker with a very powerful magnet it might be time for a new speaker. |
Iron filings in a speaker
On Tue, 21 Aug 2012 22:33:21 +0100, The Natural Philosopher
wrote: Andy Champ wrote: On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? in a nut shell. IF its stronger than the speaker magnet .. OO0oo I wouldn't put them in a nut shell, someone might swallow them. One wouldn't be so bad, but two might cause a nasty obstruction. -- Graham. %Profound_observation% |
Iron filings in a speaker
On 21/08/2012 22:33, The Natural Philosopher wrote:
Andy Champ wrote: On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? in a nut shell. IF its stronger than the speaker magnet .. I have visions of a rare earth magnet getting ripped through the cone on its way to sticking forcefully to the speaker magnet ;-) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
Iron filings in a speaker
On 22/08/2012 10:44 a.m., John Rumm wrote:
On 21/08/2012 22:33, The Natural Philosopher wrote: Andy Champ wrote: On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? in a nut shell. IF its stronger than the speaker magnet .. I have visions of a rare earth magnet getting ripped through the cone on its way to sticking forcefully to the speaker magnet ;-) Or squashing a finger. |
Iron filings in a speaker
fOn Wed, 22 Aug 2012 09:37:30 +1200, Gib Bogle
wrote: On 22/08/2012 7:29 a.m., Dave Plowman (News) wrote: Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. If it's a good speaker with a very powerful magnet it might be time for a new speaker. Agreed, and just put it down to experience, unless you're prepared to muck around with a pair of sharp tweezers for a fortnight or so... Fortunately modern speakers seem to have a sort of protection of the voice coil at the front by way of a sort of mini dome. -- Frank Erskine |
Iron filings in a speaker
On 22/08/2012 7:29 a.m., Dave Plowman (News) wrote:
Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. Coincidentally (and tangentially) I attended a very interesting talk yesterday, presented by a young man who has just completed his PhD at MIT. His topic was the design of small powerful linear motors using permanent magnets - effectively, they use sophisticated voice coils. the magnets are stacked with four different orientations in a way that traps the magnetic field, and the current in the coils is controlled to preserve the right phase relation with the magnetic field. The big issue is getting rid of the heat generated in the voice coil, and to facilitate this his little motors have close tolerances - he aims for 10 microns at operating temperature. You wouldn't want any swarf in there. |
Iron filings in a speaker
Gib Bogle pretended :
On 22/08/2012 10:44 a.m., John Rumm wrote: On 21/08/2012 22:33, The Natural Philosopher wrote: Andy Champ wrote: On 21/08/2012 20:42, Harry Bloomfield wrote: A neomibium (sp?) (rare earth) magnet on a stick might be of some use to get out the more accessible bits. Neodymium? in a nut shell. IF its stronger than the speaker magnet .. I have visions of a rare earth magnet getting ripped through the cone on its way to sticking forcefully to the speaker magnet ;-) Or squashing a finger. An aspirin sized one is strong, but not that strong. -- Regards, Harry (M1BYT) (L) http://www.ukradioamateur.co.uk |
Iron filings in a speaker
Brian Gaff wrote:
You cannot, its buggered I'm afraid. The mereest sniff will rub it away, and damage it. it cannot be recentred once this has occured. Brian rubbish -- Ineptocracy (in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers. |
Iron filings in a speaker
Rather stupidly, I left the rear speaker in place when the old Rover was
having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the middle, and the swarf has got down between that and the voice coil former. Any ideas on how to remove it? The post itself isn't the magnet pole piece - it appears to be plastic. No idea how it's held in place - there are no wires to the tweeters showing. Was the work done by a pro body shop? If so take it back and make it their problem. Mike |
Iron filings in a speaker
In article ,
Frank Erskine wrote: Fortunately modern speakers seem to have a sort of protection of the voice coil at the front by way of a sort of mini dome. Not possible with this construction - common on car speakers - where the tweeters are mounted on a central post. -- *If I throw a stick, will you leave? Dave Plowman London SW To e-mail, change noise into sound. |
Iron filings in a speaker
In article ,
Muddymike wrote: Was the work done by a pro body shop? If so take it back and make it their problem. I would normally agree - but the quote involved me removing and replacing any necessary trim. For some reason I forgot the speaker even although it was exposed by my removal of the other trim and very easy to remove at that point. -- *Avoid clichés like the plague. (They're old hat.) * Dave Plowman London SW To e-mail, change noise into sound. |
Iron filings in a speaker
In article ,
"Dave Plowman (News)" writes: Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the The EU will solve that according to the other thread, by requiring you to remove your unapproved aftermarket speaker anyway. Was the new wing approved by Rover? What about the paint? ;-) -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
Iron filings in a speaker
On Fri, 24 Aug 2012 18:55:22 +0100, Andrew Gabriel
wrote: In article , "Dave Plowman (News)" writes: Rather stupidly, I left the rear speaker in place when the old Rover was having a new rear wing fitted. Which is welded on so removing the old one would have produced some steel swarf or whatever when drilling out the spot welds - and a lot of it has ended up in the speaker. It's a fairly pricey aftermarket 6x9 with a pair of tweeters mounted on a post in the The EU will solve that according to the other thread, by requiring you to remove your unapproved aftermarket speaker anyway. Was the new wing approved by Rover? What about the paint? ;-) Trouble with paint is that refinish paint is fundamentally and importantly different to factory paint. Even when manufactured by the same paint company. So if non-factory paint were to be banned there would be a whole bodyshop industry and paint sector wiped out. The only option for many accidents would be vehicle replacement. I really cannot see the insurers sitting back and allowing that to happen. -- Rod |
Iron filings in a speaker
In article ,
Andrew Gabriel wrote: The EU will solve that according to the other thread, by requiring you to remove your unapproved aftermarket speaker anyway. True. Was the new wing approved by Rover? Yes - genuine part. What about the paint? The original paint was cellulose. Which is now banned for pro use. By the EU? That's an interesting point. ;-) The new stuff is water based. -- *Toilet stolen from police station. Cops have nothing to go on. Dave Plowman London SW To e-mail, change noise into sound. |
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