Friday, January 11, 2008

DIY Electrostatic Loudspeakers / ESLs - The Diaphragm Node Points

In this step of the ESL build, I attach Node Points to the Full Range panels. The node points eliminate unwanted resonances and the single bass note resonance peak. Nodes points are where the diaphragm is fixed to the stator using silicone adhesive. Silicone is injected into the void between the diaphragm and the stator. The silicone spreads to form a "button" that holds the diaphragm to the stator. Here I measure the node points and then attach markers where the nodes are to be injected. More measurements. After measuring the node points according to the designer's specification I mark them off. I then begin injecting the silicone at the indicated markers. The silicone adhesive is thick and spreads evenly between the diaphragm and stator in an oval pattern. Each node point is about 10mm in diameter.Here is a completed node point, freshly injected.More node points completed. View from of the node points from the diaphragm side of the panel.I leave the node points to cure overnight before commencing the next step which is to apply
The Diaphragm's Conductive Coating

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