Reconing Delta Pro 15s

[Hackomatic]

The first time I've ever done it. Actually it's not as bad as I had imagined and figure anyone should be able to do it with little chance for a disaster, AND without sending their duds off for what turns out to be an expensive rebuild. Getting all the old stuff cleaned off the frame takes the most physical effort. A good sharp utility knife is a must. Clean the gap with some double sided tape to get any stray matter out of there. Run two beads of glue on the frame . . one where the spider attaches, and another where the cone (surround) attaches. TIP: If you decide to do this yourself, get a small stirring stick of some sort to stir the glue before trying to run the beads. The nozzle became constipated several times with lumps from within and that was the most aggravating part of the whole process. After getting the glue beads around the frame, place the new cone assembly onto the frame. Really, it's just a matter of getting the voice coil down in the gap. Once it's in place, rotate the cone assembly 3 times on the frame to spread the adhesive evenly, then stop when the tinsel leads are lined up with the binding posts. Insert the plastic spacer shims opposite each other between the magnet and voice coil assembly to center the voice coil former in the magnetic motor assembly. The instructions say to let the adhesive cure out for 36 to 48 hours. I also went ahead and soldered the tinsel leads onto the binding post tabs, leaving enough slack in the leads for cone movement, but not so much that the might slap the cone during heavy excursion. I'll trim the excess lead latter . . That's pretty much it in a nut shell. After the recommended cure time, you will glue the dust cap and gaskets in place, centering the dust cap in the middle of the cone and making sure the gaskets are properly aligned with the frame screw holes. Piece o' cake! . . . Some pics.

[sine143]

pre assembled kits?

[Hackomatic]

pre assembled kits?

Yep . . McKenzie . . . $38 per kit.

[sine143]

yep. those are quite simple to put together. I"m a fan.

[byacey]

The only thing I would advise is to have the shims in place before the surround and spider touch the gluing surfaces. Any slight bias one direction or the other can lead towards an off-center coil. Once the shims are in place, carefully let the cone drop into place to complete the glue bond.
Don't try and correct anything by pushing, tugging or lining anything up; it has to be glued exactly where it falls into place.

[Curtybob]

The only thing I would advise is to have the shims in place before the surround and spider touch the gluing surfaces. Any slight bias one direction or the other can lead towards an off-center coil. Once the shims are in place, carefully let the cone drop into place to complete the glue bond.
Don't try and correct anything by pushing, tugging or lining anything up; it has to be glued exactly where it falls into place.

This makes me think that glues are widely varied depending on location and place of purchase. The glue in these pics is the same stuff I've used. There is no tack... very long working time and fairly thin liquid. As a matter of fact, the directions specifically state to rotate the cone 3x to make sure the glue is spread evenly. The cone will sit where the shims put it unless you let it sit for an obscene amount of time before sticking everything together. Not saying that is proper with all adhesives, though.