As part of a job lot of things I got 6 x JBL 2226 drivers for cheap, however I was disappointed when I got round to trying a few out that they didnt work, and more disappointed still when i then tested them all and only 1 didnt have an open circuit!
After much chin scratching and prodding, i cut the dome off one and saw that the thin flat wire that was exposed between coming out from its epoxy tunnel and into the voice coil had oxidised and crumbled to nothing. Badly stored I suppose, damp.
So, simple fix I thought, rather than a full recone, solder a bridge wire across the failed wires and epoxy over the bridge and hey presto.
Sadly, not to be! I cannot for the life of me get any solder to stick to the little flat wires. I have tried gently sanding/abrading/scraping any coating off, i have tried a couple of types of flux and bought a new soldering iron. Ive not buggered two of them by trying so much and the flat wires have come off at the VC, so i think they probably now are re-cone jobs.
However, the 4 remaining I have yet to fiddle with. Does anyone have any experience with this problem? Any ideas for how to get solder to stick to these $£$&$%ing wires?! Otherwise Ill have to sell them all as baskets which would be a shame for such a fixable (in theory) issue.
After much chin scratching and prodding, i cut the dome off one and saw that the thin flat wire that was exposed between coming out from its epoxy tunnel and into the voice coil had oxidised and crumbled to nothing. Badly stored I suppose, damp.
So, simple fix I thought, rather than a full recone, solder a bridge wire across the failed wires and epoxy over the bridge and hey presto.
Sadly, not to be! I cannot for the life of me get any solder to stick to the little flat wires. I have tried gently sanding/abrading/scraping any coating off, i have tried a couple of types of flux and bought a new soldering iron. Ive not buggered two of them by trying so much and the flat wires have come off at the VC, so i think they probably now are re-cone jobs.
However, the 4 remaining I have yet to fiddle with. Does anyone have any experience with this problem? Any ideas for how to get solder to stick to these $£$&$%ing wires?! Otherwise Ill have to sell them all as baskets which would be a shame for such a fixable (in theory) issue.
Perhaps ther are wound with aluminium. Some years ago I had a problem with the motor of my Drean (Argentine brand) clothes washing machine. The motor refused to start. I disassemble it and saw the fault: a cooked junction wire to cable. Thus I discover that the motor is wound with aluminium enameled wire. Tomá mate.
With normal solder is impossible task. Aluminium oxidizes immediately. There are special mixes sold everywhere of doubtful results.
I have done this exact repair, you can solder aluminium but it's difficult, you need to exclude all oxygen or the aluminium will instantly oxidise after cleaning. I did it by using light machine oil on the aluminium and an exacto knife through the oil to scrape the aluminium clean. The oil prevents oxygen getting to the aluminium. You then solder through the oil. It's tricky to do but it does work. I practised fist on some scrap aluminium.
Thanks that is exactly what I need to know. So just to clarify the solder will stick, but the oxidation will happen if it’s exposed to any air. So oil first, then abrade the coating under the oil and attempt to solder through the oil.
And once a join is established how do you preserve it? I’ll try and epoxy coat it all the way to the voice coil where it is protected I suppose.
I’ve ordered some some alusol to try with. But will this solder to regular copper wire, what did you use? I’ll definitely give it a go with one, and fingers crossed
And once a join is established how do you preserve it? I’ll try and epoxy coat it all the way to the voice coil where it is protected I suppose.
I’ve ordered some some alusol to try with. But will this solder to regular copper wire, what did you use? I’ll definitely give it a go with one, and fingers crossed
I tried the aluminium solder but had no luck. i used 60/40 lead tin solder. once you have tinned the aluminium with solder its protected from oxygen, you can then proceed normally. there is definitely a knack to it. also its easy to get the oil everwhere.
yes
At least back in the old days, the aluminum was copper-plated. But you "tried gently sanding/abrading/scraping any coating off". I don't think plating copper on aluminum is an easy DIY process.
Looks toxic.
Looks toxic.