Hi, I have not been here for years. Somehow the image folder has disappeared. The filter is fairly simple. It has 4 components, all in series. An inductor, 2 electrolytic caps back to back to make up a bipolar cap and a resistor that determines the amount of attenuation. This series connection is parallel to the coil of the capsule connected between hot and cold. The mod is just removing the opposite end of the filter that is already in the mic when they build it, add a bypass switch in series.