Kencat
Super Member
I successfully brought 2 EMIT diaphragms to life tonight. Surprised the heck out of myself actually. I did it just to see what would happen figuring I couldn't make a bad one worse.
The diaphragms I worked on were for the Quantum 2. I think this would work on other models as well. A brief history to get started. I had one Emit that was not working in one speaker. I picked up some spare diaphragms and proceded to change out the bad one. I found that the resistance of the bad one was 20 - 40 Ohms. I knew at that point that at least the foil was not broken, and looking at the solder joint suspected that was the problem. The good diaphragm measures 5.6 - 5.8 Ohms.
I ordered some more diaphragms lately, and one of the two measured 30 - 40 Ohms. This prompted me tonight to see if the solder joint could be repaired with with a remelt of the solder that connects the back-side metal frame to the leads of the foil strips on the Mylar-side. The winding foil strips I call the "racetrack".
I fired up the little Soldering Gun, using the pointed tip, and bravely touched each button on the frame-side, just long enough to melt the solder, and quickly removed the tip.
Word of caution: I had the mylar-side on top of newspaper, which was a good thing because the solder tended to fall downward and without coming to rest on the paper, it may have fallen right out. You can see in one the pics how the solder is raised on the mylar-side. I may have had the tip on the button too long for the first one, and made sure I was quicker on the second one.
BOTTOM LINE - It worked. Measured 5.7 to 5.8 Ohms rock solid
Below are the two Q2 EMIT Diaphragms and the tools of the trade.
Below is the Frame-side of the Emit diaphragm showing the solder buttons. This is the side to "remelt". Ignore the big solder blobs. That was where the speaker wires were soldered on. It's the small buttons that connect to the foil.
Below is the Mylar-side of the Emit diaphragm showing how the solder will tend to flow with gravity.
SO, Don't chuck out those non-working Emits without checking the resistance. If it's high, it's not broken. This solder joint remelt might be all it needs.
The diaphragms I worked on were for the Quantum 2. I think this would work on other models as well. A brief history to get started. I had one Emit that was not working in one speaker. I picked up some spare diaphragms and proceded to change out the bad one. I found that the resistance of the bad one was 20 - 40 Ohms. I knew at that point that at least the foil was not broken, and looking at the solder joint suspected that was the problem. The good diaphragm measures 5.6 - 5.8 Ohms.
I ordered some more diaphragms lately, and one of the two measured 30 - 40 Ohms. This prompted me tonight to see if the solder joint could be repaired with with a remelt of the solder that connects the back-side metal frame to the leads of the foil strips on the Mylar-side. The winding foil strips I call the "racetrack".
I fired up the little Soldering Gun, using the pointed tip, and bravely touched each button on the frame-side, just long enough to melt the solder, and quickly removed the tip.
Word of caution: I had the mylar-side on top of newspaper, which was a good thing because the solder tended to fall downward and without coming to rest on the paper, it may have fallen right out. You can see in one the pics how the solder is raised on the mylar-side. I may have had the tip on the button too long for the first one, and made sure I was quicker on the second one.
BOTTOM LINE - It worked. Measured 5.7 to 5.8 Ohms rock solid
Below are the two Q2 EMIT Diaphragms and the tools of the trade.
Below is the Frame-side of the Emit diaphragm showing the solder buttons. This is the side to "remelt". Ignore the big solder blobs. That was where the speaker wires were soldered on. It's the small buttons that connect to the foil.
Below is the Mylar-side of the Emit diaphragm showing how the solder will tend to flow with gravity.
SO, Don't chuck out those non-working Emits without checking the resistance. If it's high, it's not broken. This solder joint remelt might be all it needs.
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