Aluminum voice coil former glue?

s3tup · 9th April 2010, 11:15 PM

Hi,

I've got some Morel CDM-54 midrange dome driver, which made buzzing noises when it played 2khz tone.

I've took it apart to look what is wrong with it, and found that the voice coil is not attached well to the aluminum former.

What glue should i use?

Thanks!

HaoDaMao · 11th April 2010, 07:46 AM

A rubberized Cyanoacrylate (CA) glue is what was originally used; use Loctite 4204 or a similar product from Hernon (Quantum 134A). Small bead required - bead diameter should be around 0.2-0.3mm maximum.

Yes, I design and build transducers for a living...

s3tup · 01:53 PM

Done this with cyanoacrylate, so far it works fine.
Thanks!

What is the bead and where should i put it? The only thing that rise in my mind about "beads" is the ferrite beads used in electronics for HF noise filtering.
Probably the decorative beads may work too, depending on application requirements

Cal Weldon · 14th April 2010, 01:38 PM

The bead he is reffering to is the glue. When you apply it you are "laying the bead".

s3tup · 14th April 2010, 02:00 PM

Ah, ok then! There was almost no gap between the coil and former, much less than 0.1mm.
Thanks for clarifying!

9th April 2010, 11:15 PM	#1
s3tup diyAudio Member Join Date: Dec 2004 Location: Israel	Aluminum voice coil former glue? Hi, I've got some Morel CDM-54 midrange dome driver, which made buzzing noises when it played 2khz tone. I've took it apart to look what is wrong with it, and found that the voice coil is not attached well to the aluminum former. What glue should i use? Thanks!

14th April 2010, 01:32 PM	#3
s3tup diyAudio Member Join Date: Dec 2004 Location: Israel	Done this with cyanoacrylate, so far it works fine. Thanks! What is the bead and where should i put it? The only thing that rise in my mind about "beads" is the ferrite beads used in electronics for HF noise filtering. Probably the decorative beads may work too, depending on application requirements Last edited by s3tup; 14th April 2010 at 01:53 PM.

14th April 2010, 01:38 PM	#4
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	The bead he is reffering to is the glue. When you apply it you are "laying the bead". __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Voice Coil Formers... Kapton vs Nomex vs Aluminum vs GF/TIL	OlogyAudio	Multi-Way	3	1st June 2007 02:27 AM
Single Voice Coil Vs Double Voice Coil Subwoofer	Workhorse	Car Audio	6	12th April 2007 06:36 AM
glue for voice coil wires	malcontent	Multi-Way	5	6th March 2007 01:12 AM
Aluminum vs. copper voice coil wire?	capslock	Multi-Way	7	28th October 2002 03:46 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

11th April 2010, 07:46 AM	#2
HaoDaMao diyAudio Member Join Date: Aug 2009	A rubberized Cyanoacrylate (CA) glue is what was originally used; use Loctite 4204 or a similar product from Hernon (Quantum 134A). Small bead required - bead diameter should be around 0.2-0.3mm maximum. Yes, I design and build transducers for a living...

14th April 2010, 02:00 PM	#5
s3tup diyAudio Member Join Date: Dec 2004 Location: Israel	Ah, ok then! There was almost no gap between the coil and former, much less than 0.1mm. Thanks for clarifying!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read