Elon just needs another tax-payer funded bailout (and some better battery armor).
I tested it out on my 2nd mw6502. It took all of 5 minutes (pole-piece/magnet was already blue lock-tited previously)
All locked in place and final centering, the stainless allen screws that I all matched at 1.50" protrude from the housing at equidistance from one another.
Previously forgot to mention that the dimensions I posted also allow clearance for any Dynamat/Butyl mat so no need to remove if already applied to basket.
The 3.20" opening also serves as the magnet seat when hammering the pole piece out of magnet...
I'll update the drawing when I get a chance. I'm going to recess the top ID of the jig to recess and hold the magnet when it is being used as the dead-blow removal of magnet from pole-piece.
This set is already spoken for by another member and I have ordered enough material to make only 9 more sets. I'll start a for sale thread and it will be 1st come first served.
Am I the only one who moved to the JB Weld Steel Steel Stick for this? I think I remember Trey @VR3 recommending the Steel Stick.
"This may not matter to you, but it does to me for various reasons, many of them illogical or irrational, but the vinyl hobby is not really logical or rational..." - member on Vinyl Engine
"Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
Using the Steel Stick, I think a 4-point compass application is sufficient.
"This may not matter to you, but it does to me for various reasons, many of them illogical or irrational, but the vinyl hobby is not really logical or rational..." - member on Vinyl Engine
"Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
Nice work guys. I was just about to post asking for advice on reassembling a MW 7009 I have apart on the bench when I saw this thread. It looks like you have it covered in detail here. Much appreciated.
The world is full of answers, some are right and some are wrong. - Neil Young
Nice work guys. I was just about to post asking for advice on reassembling a MW 7009 I have apart on the bench when I saw this thread. It looks like you have it covered in detail here. Much appreciated.
These are different animals I’m afraid. Check out the photos. The basket has a base or flange attached with 4 rivets. The pole piece has two magnets. The flange OD is 3.6 inches, somewhat larger than you’re dealing with.
The Pole diameter is .99
The ID of the hole in the flange is 1.08
The annular area is the voice coil space of course.
The larger magnet sets on the flange. For our purposes, the smaller magnet is just along for the ride.
The large magnet OD is 3.39.
It is glued to the pole piece which is 3.2 OD.
I will need a jig such as yours with a 3.6 OD for the flange and a smaller OD with set screws to center the 3.2 pole piece.
But wait! There’s MORE! The large magnet is not centered; its shifted all the way to the voice coil. It will need to be centered too. And re-epoxied.
If you don’t want your thread jacked, I can start a fresh one.
Thanks, Dave
The world is full of answers, some are right and some are wrong. - Neil Young
The prototype dowel came back and am re-cutting it. I will make the rest at 1.281" OD for the smallest magnets. Seems like Polk was all over the place there too....
Aleans tacky glue. On both like contact cement and let set like contact but to the point of dry, when pressed together you still have some work time. I believe it works for the spider as well..
On rubber surrounds you may be limited to more of a contact like cement. I've not had to repair one (knock on wood) yet. At one or another the recommendation of tire repair cement was in vogue.
I've never used Aleans on rubber it was poly foam type and it worked well.
Aleans tacky glue. On both like contact cement and let set like contact but not to the point of dry, when pressed together you still have some work time. I believe it works for the spider as well..
On rubber surrounds you may be limited to more of a contact like cement. I've not had to repair one (knock on wood) yet. At one time or another the recommendation of tire repair cement was in vogue.
I've never used Aleans on rubber it was poly foam type and it worked well.
I know it works on paper cone tears.
One of my shop speakers took a large flying metal chip awhile back. I fixed with Aileens and moved them to the top shelf.
I’ve used Aleene’s with good success too, several years ago. I’ll go fetch some. I’ll also share a photo of my very low tech magnet centering method. Feel at liberty to laugh. The 18 gauge solid wire gets it in the ballpark and then I used an aluminum vice to dial it in a little after applying the epoxy. It’s going to be pretty close when none of the wires are in a bind. The Devcon 5 minute epoxy with the static mixing nozzles are perfect for injecting the epoxy between the magnet and basket. Not a very elegant solution but I expect it to work well enough.
The world is full of answers, some are right and some are wrong. - Neil Young
Alright I can't take it any longer.......what are these wire segments I'm looking at? Surely those can't be voice coil to pole piece gap spacers (sorry for calling you Shirley).
George / NJ
Polk 7B main speakers, most mods comp. (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform
Comments
Harry / Marietta Georgia
I tested it out on my 2nd mw6502. It took all of 5 minutes (pole-piece/magnet was already blue lock-tited previously)
All locked in place and final centering, the stainless allen screws that I all matched at 1.50" protrude from the housing at equidistance from one another.
Previously forgot to mention that the dimensions I posted also allow clearance for any Dynamat/Butyl mat so no need to remove if already applied to basket.
The 3.20" opening also serves as the magnet seat when hammering the pole piece out of magnet...
Happy Birthday America.
Polk 7B main speakers, most mods comp. (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform
Indeed, the Kegerator is setting at 35 degrees and the fireworks are already on.
This set is already spoken for by another member and I have ordered enough material to make only 9 more sets. I'll start a for sale thread and it will be 1st come first served.
I will fix your shifted magnets for free.
Go ahead and get one for yourself lawdogg
I love the granite base! Solid!
Belles 21A Pre modded with Mundorf Supreme caps
B&K M200 Sonata monoblocks refreshed and upgraded
Polk SDA 1C's modded
Wireworld Silver Eclipse IC's and speaker cables
If you're doing the repair service for members on your spare time, I'd be glad to send you a set, free of charge, to help out the community.
"Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
"No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
"Sometimes I do what I want to do. The rest of the time, I do what I have to." - Cicero, in Gladiator
Regarding collectibles: "It's not who gets it. It's who gets stuck with it." - Jimmy Fallon
Post magnet and pole-piece dimensions if you can.
The Pole diameter is .99
The ID of the hole in the flange is 1.08
The annular area is the voice coil space of course.
The larger magnet sets on the flange. For our purposes, the smaller magnet is just along for the ride.
The large magnet OD is 3.39.
It is glued to the pole piece which is 3.2 OD.
I will need a jig such as yours with a 3.6 OD for the flange and a smaller OD with set screws to center the 3.2 pole piece.
But wait! There’s MORE! The large magnet is not centered; its shifted all the way to the voice coil. It will need to be centered too. And re-epoxied.
If you don’t want your thread jacked, I can start a fresh one.
Thanks, Dave
On rubber surrounds you may be limited to more of a contact like cement. I've not had to repair one (knock on wood) yet. At one or another the recommendation of tire repair cement was in vogue.
I've never used Aleans on rubber it was poly foam type and it worked well.
I will fix your shifted magnets for free.
Fixed it.
One of my shop speakers took a large flying metal chip awhile back. I fixed with Aileens and moved them to the top shelf.
Polk 7B main speakers, most mods comp. (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Crown D150 amp
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform