pwhodges wrote:So long as you accept that like a bottle of wine, a speaker driver can go off!
Dear Paul
Touchée
Aah! But what a way to go!
In fact thanks to eBay I have just been able to track down new foam surrounds and even possible long lasting rubber surrounds for such beasties and have been taking apart a couple of units where I replaced the foam spider by some thin rubber sheeting a couple of years ago, with no visible deterioration. So these units are not going to be going . . .
However when I last repaired them I used superglue to hold speech-coil wires in place and I think it was either this or solderflux that has destroyed the aluminium or silver speech coil wire in the vicinity of joints. I'm now trying shellac which I'm assuming to be fairly inert. In any event, does anyone have any magic tricks up their sleeves for soldering copper wires to silver or aluminium wire? I'm simply making a tiny coil of the copper wire and using this to enclose the foreign metal, using surface tension to fill the coil and envelope the speech-coil wire. It works but are there any better techniques?
Best wishes
David P