Hi all.
I have a pair of Celestion A2 speakers which are too good to trash but unfortunately a tweeter has died in one of them and no replacement parts are available!
I have removed the tweeter and the problem is that the wire around the diaphragm has burnt right through on about 4 of the windings.
It will be devilishly tricky to repair but my idea is to get some appropriate wire and rewind.
Anybody got any suggestions as to the best way to aproach this? I’d much rather save myself the bother and put in some new tweeters but as I said there aren’t any!
Alternatively anybody got any idea for alternative replacements?
Many thanks all!
I have a pair of Celestion A2 speakers which are too good to trash but unfortunately a tweeter has died in one of them and no replacement parts are available!
I have removed the tweeter and the problem is that the wire around the diaphragm has burnt right through on about 4 of the windings.
It will be devilishly tricky to repair but my idea is to get some appropriate wire and rewind.
Anybody got any suggestions as to the best way to aproach this? I’d much rather save myself the bother and put in some new tweeters but as I said there aren’t any!
Alternatively anybody got any idea for alternative replacements?
Many thanks all!
As you say, these tweeters are unobtanium!
Perhaps, if you post some photos showing the extent of the voice coil damage, someone may give you pointers on possible repair.
Perhaps, if you post some photos showing the extent of the voice coil damage, someone may give you pointers on possible repair.
Thanks
At the moment the coil is completely unwound with about 8 inches of wire damaged and unusable.
I will measure the wire with a micrometer and try and source a suitable replacement at the correct length.
Then I'll have to devise a way of winding to create as even a coil as possible - it was that I was after tips on really
At the moment the coil is completely unwound with about 8 inches of wire damaged and unusable.
I will measure the wire with a micrometer and try and source a suitable replacement at the correct length.
Then I'll have to devise a way of winding to create as even a coil as possible - it was that I was after tips on really
Update on this.
I’ve completed rewinding the tweeter and it really wasn’t all that difficult.
Steps were:
Measure the existing wire with a micrometer
Order some appropriate wire (I used 0.125mm enamelled copper wire)
Get some slowish drying epoxy resin (5 mins was all I could find but it was enough) - make sure it has a high temperature rating.
Get a piece of dowel with a diameter smaller than the coil and bring it to size by winding on electrical tape so the tweeter fits snugly on the end
Rest the dowel in the nose bit of an upturned pair of glasses
Get your highest magnification reading glasses (plus 3 at least) so you can see what you are doing
Spread the epoxy thinly on the surface the wire will go on taking care not to glue the dowell to the electrical tape (in hindsight I would have put some cling film round the end of the dowel first so it wouldn’t get glued to the tape - as it was I was careful enough)
Stick the first wind down being sure to leave a good amount trailing for trimming and soldering later.
Carefully wind the rest of the wire on counting each turn (you may have to refer to the other tweeter for the number of turns. If you maintain good tension the previous turn will act as a guide to the next and as long as you angle it right it should fall into place naturally
After winding on the correct amount of turns brush some more epoxy on the top.
It really is rather neat!
I’ve completed rewinding the tweeter and it really wasn’t all that difficult.
Steps were:
Measure the existing wire with a micrometer
Order some appropriate wire (I used 0.125mm enamelled copper wire)
Get some slowish drying epoxy resin (5 mins was all I could find but it was enough) - make sure it has a high temperature rating.
Get a piece of dowel with a diameter smaller than the coil and bring it to size by winding on electrical tape so the tweeter fits snugly on the end
Rest the dowel in the nose bit of an upturned pair of glasses
Get your highest magnification reading glasses (plus 3 at least) so you can see what you are doing
Spread the epoxy thinly on the surface the wire will go on taking care not to glue the dowell to the electrical tape (in hindsight I would have put some cling film round the end of the dowel first so it wouldn’t get glued to the tape - as it was I was careful enough)
Stick the first wind down being sure to leave a good amount trailing for trimming and soldering later.
Carefully wind the rest of the wire on counting each turn (you may have to refer to the other tweeter for the number of turns. If you maintain good tension the previous turn will act as a guide to the next and as long as you angle it right it should fall into place naturally
After winding on the correct amount of turns brush some more epoxy on the top.
It really is rather neat!
Good news! A photograph would have been nice. You don't say if you've actually tested the renovated tweeter yet, so I hope it works like new. 🙂
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