ribbon tweeter

[Andy Bartha]

I have a unkown manufacturer blown ribbon tweeter out of a Audio Mecca Megatrend speaker from the mid 8O's. Does anyone know made this tweeter or point me to someone who can repair ribbon tweeters.

 

[drumheadz]

Could you post a pic? Cheerz

 

[Andy Bartha]

picture of the Ribbon tweeter

 

[tinitus]

Gamma is an eastern europe copi of the famous Decca, looks like that - I know the inside of a Gamma, but not the Decca

Magnets may be cobolt or even alnico, I dont know - front poleplate could be special too

 

[[Ro]Sharky]

i think u have the same model as i do

http://i14.tinypic.com/62yczo2.jpg

Mine are bulgarian tweeters made after goodmans specifications.
The foil is made out of plastic with a metal coating.
I don't know how u can build something like that.

You can try cutting a piece of aluminium foil and mount it between the two screws.
You will have to make sure that the impedance of the repaired tweeter has reasonable values.
Put a resistor (10ohm) in series with the tweeter, and connect them at a sinusoidal voltage source from 2kHz to 20kHz.
Check the voltage on the resistor and compare it with the voltage on the tweeter. The ratio between them is equal with the ratio of the resistor's and the tweeters impedance value. It should be greater than 0.3. Otherwise your amplifier will see a very low impedance and

good luck!

 

[Andy Bartha]

From your picture it looks like you are right they are the same. Can you supply me the name of the manufacturer and an e-mail address. It would much easier to replace the ribbon than whole tweeter.

 

[AKN]

Gamma

Hi,

HIFI KIT in here in Sweden has had Gamma units in stock since they opened the shop in the mid seventies.
Here's VLD13, expensive but available.
Maybe HIFIKIT have spare ribbons for sale?

 

[[Ro]Sharky]

sorry, i don't know who made them and neither their email address, if they have one and if they are still in bussiness.

I got them from a friend. They were 10$ a pair.
They sound pretty good.

 

[Andy Bartha]

4fun,
Could you do me a favor and get an e-mail address for HIFIKIT. I do not read Swedish and did not see an e-mil address. Those are the tweeters I have and they are the 16 ohm versions. I'm hoping they have replacement ribbons. Thank you for your help.

 

[AKN]

4fun,
Could you do me a favor and get an e-mail address for HIFIKIT. I do not read Swedish and did not see an e-mil address. Those are the tweeters I have and they are the 16 ohm versions. I'm hoping they have replacement ribbons. Thank you for your help.

I have the mailaddress.
I cannot see their mailaddress on their site, maybe HIFI KIT wants it that way. Strange but I suppose that I should not put it in public if HIFI KIT don't.

You have no PM buttom, mail me for the address.

 

[Marik]

picture of the Ribbon tweeter

Hi Andy,

I specialize in ribbon microphones repairs, which have exactly the same principle, but use much finer ribbons (I am working with thicknesses down to 0.6 micron ). I have the whole range of foil thicknesses, as well as a few corrugators with different pitches.
If you don't find any better solution I don't see any problem to repair those for you. I might be able to get a corrugated metallized mylar, as well.
Shoot me email at:
ribbonmic(at)comcast(dot)net

If moderators feel it is a spam, feel free to remove.

Best, M