BjarneAndersen

I managed to make 2 new coils in two layers, first layer in 12½ turns and second layer in 11 turns. But there is something strange for, according to the original drawing, the coil should be between 3 to 3.7 ohms. I measured the old wire with a micrometer screw to 0.12 mm and a length of 1.65 meters and measured it to 4 ohms. The new coil is also made of 0.12 mm. wire 1.65 meters long and measures 4 ohms. I don't know if they just had a bad day at the factory when they made it. But I am currently satisfied with the result.

Many thanks for your reply, I will now try to make some new coils after the drawing.

Hello everyone. Thanks for all the inputs on restoration of AR 3/4 "tweeters. I have been able to make 2 new coils of 0.12 mm insulated copper wire 1.65 meters long, giving a coil of 4 ohms. they succeeded and when I added some magnetic cooling oil they played fine.

Sorry for my bad English i am from Denmark. I have restored my old AR9LS from 1983. Rebuilding the crossover to AR9LSi with new capacitors and re foaming the 10" 12" 8" speakers. Now I've discovered that the 3/4" tweeter are blown in both speakers and no one on E bay for sale. I bought some 0,12 mm. copper wire and i will try to make a new coil at 4 ohm. Has anyone tried it?. Or someone who knows if you can take a coil and dome from another AR 3/4" tweeter that fits in the original?.