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Old 04-14-2007, 04:38 AM
jpb_dk jpb_dk is offline
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Join Date: Apr 2007
Posts: 8
EMIT-R, Tweeter. How to repair

Having nearly the same problem as described for the traditional EMIT.
I cant resolder the terminals on the EMIT-R folio. Picture attached.
While remelting the solder i cant make it "bite" again. Do anyone of you know about cleaning the joint so that the solder can "bite" like normal ?
It seems that the flus in the new solder is not enough.

Im affraid to turn up the heat to much on my soldering station and "roast" the diaphragms itself.

Ideas are much appriciated. It seems to be "cold soldering" from the beginning, and to resold the other tweeter would be a good thing to do in the same operation.

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Old 04-14-2007, 07:05 AM
jeffn's Avatar
jeffn jeffn is offline
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Join Date: Jun 2006
Location: Australia
Posts: 1,583
Just an amateur comment, but melting the solder and thinking it will stick to something that not as hot is a big mistake.. Remember, you need to heat the connection first then touch the solder onto it.
In the middle of my Street
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Old 04-14-2007, 10:41 AM
Jygesq Jygesq is offline
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Join Date: Apr 2006
Posts: 520
use a low wattage pencil solder iron

about 20 watts with thin rosin core solder. heat contact up till its hot enough to melt solder when it touches it. low wattage iron is key
Infinity RSII. Yamaha CX2. Acurus A250, Marantz SA11. Yamaha px-3, with Grace F9E. , Yamaha tx-950 . RETIRED: Yamaha cr-1020, AR Receiver,Scott 340,340b 222c,310 tuner, ADS 810.AR 3A ,KLH6,AR TT Marantz 63se, Advent 201A
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Old 04-14-2007, 11:34 PM
jpb_dk jpb_dk is offline
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Join Date: Apr 2007
Posts: 8
Jygesq & jeffn, thanks for your comments.

Its more like the diaphragm is coated.
The solder and the wire/terminals goes well.
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Old 04-16-2007, 02:44 PM
jpb_dk jpb_dk is offline
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Join Date: Apr 2007
Posts: 8
ok, problem solved. Do not try to solder it. It has to be done with conductive "silver-glue". Another problem is that the previus owner have "roasted" the tweeter with his CervinWega monsterWatt amp. It has to be changed because of diffrence in weight of the diaphragm (responcetime, freq-resp ect.)

Anyway. I picked the Kappa 7,1 up for $120 and have to fix a tweeter. Not that that bad at all. Next step is to turn them into an active speaker with 2x hypex 180W amps, electronic x-over to replace the bas-section HF filter, and the top section LF filter. Components in the passive part really sucks. That should be done over a weekend.
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