Who has done this ?........ ( Older ALTEC Woofers )

[LowOhms]

these are the people that made the 'goop'.

Air Products and Chemicals, Inc. - Manufacturer of industrial gases and specialty chemicals

they called 'that stuff', 'airflex 5100'.

if your real nice, they may tell you what you need to soften 'this stuff'.

they may not,

as most of what they do involves a great deal of research,

and its my understanding that they have much competition from around the world.

competition that is serious, as in espionage/sabotage serious,

so you might use a great deal of tact.


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here is one of their products, although it might not be obvious, there are people watching this 'tank' as it makes its travels -





RailPictures.Net Photo: NS 3435 Norfolk Southern EMD SD40-2R at Bethlehem, Pennsylvania by Austin MacDougall

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i've tried Acetone, i don't it again.


thanks for the link

Hello tomt !!

Helpful post. It lead me to this on airflex 5100 with Google :

http://www.hostboard.com/forums/f700...ex-5100-a.html

and most interesting was post #12 in that thread.

Another thread on "goop" is here, how to get it, not how to clean it :

http://www.audioheritage.org/vbullet...Goop-quot-guy-!!!

tomt, you wrote at the end of your post in words I am unable to comprehend , this :

" i've tried Acetone, i don't it again. "

Can you please share with us exactly how you tried acetone, and what were your results ???

Were you meaning to say " I won't do it again ".??

What happened, 'cause I don't want to ruin my remaining uncleaned 515B, and do seek a good solution, with the help of others smarter than me.

Jeff Medwin.

[RonSSS]

If you have a dud cone, I would try automotive brake cleaner.
Both the chlorinated and unchlorinated. I use it for cleaning all sorts of stuff.
Also try spray carb cleaner.
Perhaps try, toluene, or lacquer thinner.
I'd also be tempted to get a bag of the wooden Qtips.
Although they might put more stuff in the goo.
Bill at GPA may know what removes it too. He puts the stuff on!
Ron

[mikebond]

Hello!
I did it many times, maybe before Per Hasling The best liquid is nitro solvent (based on acetone) for nitro paint. Here in Russia it called "646" Solvent. This solvent leaves no spots on the speaker's cone. I use medium hard brush.

Regards, Mike

[604man]

I use Toluene and a natural 1/2 in. wide paint brush trimmed 1 in. long to clean the accordion.

apply for 20min. Toluene is the solvent for the goop...........GC

[mah]

FYI: Tannoy K3809 - hardened cloth surround issue - solved - diyAudio

[LowOhms]

WOW, PROGRESS.

Posts #6,8,9 and 10 have given anyone interested a "handle" on what to do.

My immediate thought is to find the proper USA - source, equivalent to the USSR 646 nitro solvent. Also, we need to study Toluene, and its properties as per 604man's post. Then, determine if we DIYers can purchase same ( or equivalent ) in small amounts, and if necessary, ship it safely to our homes by standard shipping services.

Humm, more research work needs to be done.

Any Chemists amongst us? ( I know a PhD in St. Louis, "the Disc Doctor." )

If others have any good ideas and want to chime in, please do so in this thread.

Personally, I have come a very long way in a short time from "guessing" to use 91% Isopropyl Alcohol on my first 515B - last month.

ANY older ALTECS with 15 inch cones - displaying migrated and uneven tar, particularly outer surrounds with "c l u m p s" as Per Hasling calls them, will be rejuvenated by this process. It was quite audible ( to me ) driving a 515B full-range-direct, so it SHOULD also apply in to the vintage 604s, which by design, cross over high.

I'm thinking, " linear dynamic drive of the cone's outer periphery is a GOOD thing."

Additional contributions from other Forum Members? Can we take this further? Can we really NAIL this ?

Many Thanks - to those who contribute.


Jeff Medwin

[604man]

Jeff, The goop is Altec part #54007-1 pint ..It contains Toluene and Hexane. I use Toluene to
clean the surround and thin the goop out for easy application...As per my reply, You can go to
Walmart to get a wood/natural bristle brush....Don"t use a Q-tip!...I have the glue for the VC
which uses MEK as solvent and the spider glue...I don't have the cans & PN# handy ,Hiding in
the basement some where. Altec supplied all three glues in tooth paste style containers with
their re-cone kits.....GC

[Altec Best]

Here's another thread on the surround dope.

"http://www.hostboard.com/forums/f700...ound-goop.html"

[tomt]

so now we have the dope about the goop ...