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Speaker patching

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Speaker patching Empty Speaker patching

Post by Bill Cahill on Fri Aug 27, 2010 5:09 am

Hi, guys. I am presently working on an earlier RCA Victor 45 player with a lid. It's bakelite, three octal tubes, and, portable.
Anyhoo, earlier today I was noticing a growing rattling problem in speaker, and, the panic sign went up.
I got it apart, and, found it rubbing and, ripped.

When I got around to repair, here is what I did....
I removed speaker from amp.
I turned it face down.
I got out my small bottle of contact cement , and,a good sized piece of Scot toilet paper.
I didn't want this showing from the front, so, after evenning up what I found to be several rips, I put a good amount of cement on back of cone accross each rip.
I tore off a piece of toilet paper, and, put it accross that rip.
After I finnished those patches, I turned speaker over so front was sticking up.
I dabbed on the contact cement on each of those rips, and, just for safety sake, since it looked not right, I put it on circular area where cone attatcehs to voice coil.
I let it dry a couple of hours, and, put machine back together.
Upon trying it, the rattle is gone, and, set plays great.
Speaker no longer rubs, either.
Yes, voice coil was coming loose.
Not now.
Bill Cahill Very Happy

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Post by tube radio on Fri Aug 27, 2010 1:40 pm

That is good information.

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Post by Where did I put that... on Fri Aug 27, 2010 4:20 pm

Is contact cement the same as what used to be called rubber cement?
Where did I put that...
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Post by Bill Cahill on Fri Aug 27, 2010 4:45 pm

Well, it's got a rubbery texture when wet, but, it driessemi hard. It stays flexable like rubber cement, but, is stronger.
Bill Cahill

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Post by denver on Fri Aug 27, 2010 9:04 pm

Should of used coffee filters they have fiber in them rascals. And 3m#77 adhesive . Very Happy
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Post by Resistance is Futile on Sat Aug 28, 2010 1:00 am

Contact cement is stronger than rubber cement. Contact cement is used to glue Masonite or Formica sheeting to plywood. I used it when I refinished Voice of the Theater Speakers. The speakers had 1 inch plywood and was painted black. I used Walnut grained Formica and cut to size for 5 sides and trimmed with a router. then install speaker grill cloth, (Brown color). Trimmed all edges with brass channel and brass edge protectors.

Two professional cabinet looking, huge speakers. I mounted the external metal horn tweeters on the inside so they wouldn't show. They were used for music tours to other Churches. Best sounding Speakers I ever Heard.

They were 4 and 1/2" high king
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Post by Ken g on Wed Mar 27, 2013 9:18 pm

I dont use any rubber or contact glues ...or patch material over simple rips .
I only use wood glue and fabric glue . For a simple rip all you need is a very small amount of wood glue over the rip . Out on the flexable part fabric glue is used .
I only use a patch where there is a hole .



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Post by willy3486 on Wed Mar 27, 2013 10:36 pm

I used that method for years. I have some I did 20 years ago that are still as good as new. So I know it lasts for at least 20 years if anyone is wondering if it lasts.

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Post by DancingBear on Wed Mar 27, 2013 11:03 pm

Thanks, Bill. Good info. I do however wonder about the validity of any fix along this fashion that doesn't involve duct tape. At least use a bit to hold the wires in place. It's a law...somewhere.
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Post by jtauser on Thu Mar 28, 2013 2:33 am

Used dryer sheets are a good patching material. I use 50% thinned Aleene's Tacky Glue to attach them.
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Post by easyrider8 on Thu Mar 28, 2013 5:30 am

Coffee filters and fabric glue works great, have been using it for years.

Dave
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Post by Wildcat445 on Thu Mar 28, 2013 12:21 pm

Bright red polyurethane fingernail polish will work in a pinch. Do not use used coffee filters. Dont ask....


Regards

WC

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Post by jerryhawthorne on Thu Mar 28, 2013 7:49 pm

Someone else agrees with Dancing Bear about the value of duct tape. Here is a picture of a speaker that came out of a Philco Console I purchased. Duct tape did the job! bounce
Jerry

Speaker patching 112ducttape

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Post by jtauser on Fri Mar 29, 2013 2:09 am

O.. M... G.....!
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Post by 75X11 on Fri Mar 29, 2013 8:06 pm

I keep a tube of this in the fridge and have used it for speaker tears. It is the consistency of molasses and can be applied with a model paintbrush. and it is mighty strong and doesn't crumble. It also absorbs into porous materials to bond well.

http://cdn.yoyoexpert.com/379/view/images/01.jpg
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Post by jerryhawthorne on Mon Apr 01, 2013 3:55 pm

I did appreciate the painting of the tape with black spray paint. The patching didn't show through the grill cloth, making it a rather unpleasant surprise when I removed the speaker.
Jerry

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Post by Ken g on Mon Apr 01, 2013 9:21 pm

I keep a tube of this in the fridge and have used it for speaker tears.

NO Surprised

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