It is obvious that the disturbance enters the microphone through the mesh of the headbasket.
The microphone body is properly grounded. (Ground resistance is close to 0 ohms.)
If I cover only the headbasket with aluminium foil, this eliminates the disturbance completely.
It seems the only way to get rid of the disturbance is to reduce the emitted power (only 10 mW) of the timecode transmitter.
And yes, I checked the cable connection; the shield is both connected to pin 1 and the connector shell.
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Started by RuudNL - Last post by RuudNL | ||
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Started by RuudNL - Last post by klaus | ||
Hello Ruud, I am curious: did you follow my cable termination recommendation? Yes? No?
If you did, the mic's housing would be included in the grounding of the mic's housing facilitated by the terminations I recommended. The faraday cage, then, would be complete, as the triple mesh of a U87 basket is dense enough to fully shield the high-impedance section of the head. |