Glue Question

[DONALD G]

WOW
I have only been a member of this forum for less than
one week and have managed to offend one of its most
respected senior members.

I better do a yahoo search and find a cervin vega forum
I can join. I think i still have a pair in the attic.

Giskard have you ever shot a L100 with a ak-47 ?
I bet you want to.

[Ian Mackenzie]

Cool idea,

3 db more sensitivity and new boxes, wouild you try and blend the 1500 sub?

Ian

[Ian Mackenzie]

Yeah ,

Well if you can crossover low enough, then you have flexibility with the sub placement ect so could get best imaging and low end...best of both worlds.

I was toying with that idea my self while back using the smaller version of the 2344 from the 4425 and say even the 2118s in vented boxes for small L+ R front & rear and centre.


Anyway good luck with your transformation....but I would save the 4430 boxes.

Ian

[ARG]

Originally posted by DONALD G
Hello,

After 25+ years of hard use, I have developed a problem
with one of my L100 speakers. When turned up I hear
a "snapping" noise out of the 123a. After closer inspection
I found that the cone is starting to separate from the spider.
Doing a search of this forem, the best advice was to use a
carpentry type cyanoacrylate glue which I have not been able
to find ( not at home depot,lowes or the local hardware
stores ). Does anybody know of a specific glue that they
have used, and where to buy it ? Has anyone used the speaker
repair glue that parts supply sells ( 340-076). Any help
would be greatly appreciated.

Don

Hi Don;
I have been building and rebuilding for years , obviously I like blowing up drivers .
Anyway I recently found a glue thats almost perfect for older drivers , it is a polyurethane based (general pupose glue) made by Lepage ( available in Canada , not sure about the U.S. )
It comes in small 118 ml bottles and has a UPC of 061083 002909
This glue has some great properties .
You require very little to get the job done .
Use a tooth pick to spread on small drops of the product , then wait . The glue produces micro bubbles when it goes through the curring process which takes roughly 48 hours , because this glue is a poly urethane it will always remain slightly flexable yet very strong .
Cyranoacrilate is not any good for speakers its far too brittle to take the vibration and most 2 part epoxies suffer the same problem unless they have been stabized for vibration ( flexable formula) .
The Lepage polyurethane produces a great result , strength and has good dampening sharacteristics because of the micro bubbles that set up during the cure process .
Anyway thanks my 2 cents worth !
Cheers ....ARG

[DONALD G]

ARG,

I used that cyanoacrylate glue yesterday on all
3 of my 123a-1's that had the spider problem,
and so far so good. The fan on my crown ce-2000
has been on all afternoon and nothing has come
loose yet. I ordered a different glue that the salesman
at parts express recommened, but it seems just
like elmers white glue. He said it was good for foam
surrounds.
I looked at lepages website for that glue but didn't
find it. I'll have more time tomorrow. I go to windsor
every month or so and i'll pick a tube up to use as
a backup if the super glue fails if its only available
in Canada. I appreciate your 2 cents worth.

Don

[John]

Hi Don If your in Windsor go to Canadian Tire they stock that glue. You will find it in the paint department. The full name is

Lepage Polyurethane Universal Adhesive. I think it sells for about 4 to 6 dollars canadian.

[GordonW]

Cyranoacrilate is not any good for speakers its far too brittle to take the vibration and most 2 part epoxies suffer the same problem unless they have been stabized for vibration ( flexable formula)

Um, I don't know about this.

For one example, Peavey has been using cyanoacrylate on almost ALL of their speaker assemblies, for years now. I am good friends with the busiest pro reconers in the area here, and they've NEVER seen a Peavey driver, no matter how abused/blown/overworked, that the cyanoacrylate glue joints failed in. I've also used it EXTENSIVELY in rebuilding drivers, as has the other reconer around here, on not just Peavey drivers... and after several years of implementation, there's never been a problem.

In fact, on some repair parts, I've seen EVERY other type of glue fail, EXCEPT cyanoacrylate! There are certain materials used on voice coil formers, in rare cases, where the standard glues (EV black glue, Waldom adhesives, etc) simply WILL NOT adhere reliably. OTOH, the cyanoacrylates will "bite"... reliably and STRONGLY, even to these parts.

BTW: These cyanoacrylates we're using, in a large part in reconing, are the ones referred to above... they come from Wood Finishers Supply, under the Original Masters Magic label. They're not listed on the WFS website for some baffling reason (I looked!), but I can say, they're READILY available at the actual WFS retail stores!! Why they don't have them listed online, I dunno WTF is going on there!

As for epoxy- Cerwin-Vega uses lots of epoxy, and on their replacement cone assemblies, especially the 188 and 189 18" pro woofers. I DO NOT believe they vibration cure it. Also, the epoxy they uses, is a dead-ringer, from a property standpoint, to JB Weld and the like... VERY hard stuff. However, I've never seen one of them fail, from an adhesive-related problem...

[DONALD G]

Hey Gordon,

It was your reply to a mid january thread that convinced me to try the cyranoacrilate glue in the first place. I went to all the local lumber yards looking for it, but the only thing I could come up with seemed to be the basic crazy glue - to thin. The cyranoacrilate gel thats parts express sold me hopefully will work.
I very much appreciate your input.

Don

[jbl]

[QUOTE]Originally posted by DONALD G
[B]WOW
I have only been a member of this forum for less than
one week and have managed to offend one of its most
respected senior members.

All insults are by appointment only. ("I have an appointment to insult Ambassador Trentino").

[DONALD G]

I can't afford to p*ss anybody off. I have spent lots
of money the last few weeks on speaker components,
and I'm going to need help putting my project together.
Oh boy, what have I done...

[4313B]

I don't think you've p*ssed anyone off. That Cerwin Vega remark might have caused a few dry heaves but that's to be expected

I think everyone here is up for offering whatever help they can to anyone who wants help.

[DONALD G]

Appreciate that - time for a new thread.