I ordered a pair of vintage Diatone speakers (DA-66Z) and the shipper loaded them facing down and the tweeter cone got crushed during shipping. I only paid $10 dollars for them so it seems like even more of a hassle to ship them back or deal with that. So I'm wondering is there any way to repair the cone? I tested the frequencies and sound still seems to come out fine from it, but it was just an ear test. I'm not looking for the original sound or anything but just wondering if it's possible to re-cone or is it just completely gone? Thank you
First you have to remove the protective screen! Then you can with great ventilation use lacquer thinner (Not paint thinner!) applied to the edge of the dome with a dropper and patience remove the dome. Let the solvent do its' work and don't use too much to drip into the voice coil gap. Just keep the joint wet until the cone comes off easily. Then you can reform the cone with your fingers. I would use Moyen loudspeaker glue to replace the dome. However you can probably get away with rubber cement intended to attach Formica to a surface.
So the cone is actually gone, it broken into a few pieces and I'd have to source another cone. I was also looking and there seems to be a lot of third party voice coils, is it possible to just remove the whole voice coil and dome and replace it with a third party one? Do they have to match ohms and sensitivity or just the size?
Is it the dome or cone? The original dome cannot be replaced. However you can form ordinary aluminum foil into a dome with your fingers and glue that into place. Of course it will not be the same.
Small tears in the cone can be repaired with just loudspeaker glue, again it will not be the same.
Small tears in the cone can be repaired with just loudspeaker glue, again it will not be the same.
How in Hell can a dome be crushed behind that metal grid?
Extra points for crushing it without damaging or even bending the grid.
No, you can´t repair it.
No way.
maybe, IF you get a dome with exact same voice coil diameter, winding length and winding in exact same position.
In woofers, you can put voice coil first and then fit cone; in Tweeters dome and VC are sold preassembled, and even if aftermarket, it must be made for that specific tweeter.
As sweetbr said, get another tweeter.
You might do that in a woofer, where dome is only a dustcap, but not in dome tweeters where it´s the radiating element, it´s not there just for cosmetic reasons.
Disassemble.
Look at and measure the VC diametre and depth.
I've never had the opportunity to play with a Diatone but many dome tweeters from that era share common components and there is a possibility that replacement assemblies are around.
If not then good luck with finding a replacement tweeter.
Tweeter doesn't look crushed in the photo, looks like a fragile failure and I've never seen that before. I'd be interested in what you discover and please post more pictures after you have removed the tweeter from the box.
Look at and measure the VC diametre and depth.
I've never had the opportunity to play with a Diatone but many dome tweeters from that era share common components and there is a possibility that replacement assemblies are around.
If not then good luck with finding a replacement tweeter.
Tweeter doesn't look crushed in the photo, looks like a fragile failure and I've never seen that before. I'd be interested in what you discover and please post more pictures after you have removed the tweeter from the box.
The tweeter dome consists of a titanium substrate on which a thin film of boron is deposited by physical vapour deposition.
Since if I just leave it it's broken anyways I'm gonna try and replace things and see if I can get it working. The tweeter is rated for 6ohm but it seems pretty hard finding a voice coil at that rating. Can I just use an 8ohm one?
That sounds toxic.
It will make sound, but you would need to modify the crossover to get it right again. This probably applies anyway, even if you would find a different tweeter with the correct 6 ohms impedance. I would be happy with any tweeter with the correct shape to fit the hole.
Physical vapor deposition is done inside a vacuum chamber.
A lot of metallized plastic, hard coating for eyeglasses and so on are done that way.
Not toxic.
You can dismantle the tweeter, and try to bring the thing back to shape, but it will not be as perfect as it was when stamped in a tool.
YMMV...
A lot of metallized plastic, hard coating for eyeglasses and so on are done that way.
Not toxic.
You can dismantle the tweeter, and try to bring the thing back to shape, but it will not be as perfect as it was when stamped in a tool.
YMMV...
You don't need a dome or cone, but a replacement diaphragm for this specific tweeter. Or a new tweeter.
Best regards!
Best regards!
Boron can cause a risk to workers who are exposed to high levels of dust or fumes. It shouldn't pose much of a risk in the case of these tweeters.
It would appear to me from the photo that the boron coating may be peeling off the titanium dome, in which case the basic structure of the dome is intact, and the tweeter should still function.
It would appear to me from the photo that the boron coating may be peeling off the titanium dome, in which case the basic structure of the dome is intact, and the tweeter should still function.
It is incorrect to say that Boron is not toxic. Boron is classed as having low toxicity.
As you say, Kay, boron is an essential trace element, but it can still be dangerous to humans if consumed in large amounts.
https://borates.today/how-toxic-is-boron/
According to Wikipedia, it's toxicity is about the same as table salt's (NaCl) 😉. Maybe it was puzzled with beryllium, whose oxides are rather toxic?
Best regards!
Best regards!