Take the measurement across the 2 capsule wires, where they are soldered to the PCB.? One terminal will be connected to ground, the other will be the output of the voltage multiplier low pass filter - which is the point we are interested in.
If that is where the problem lies, that DC voltage reading will be much lower when the mic is switched? first switched on, and will rise to about 50V when the mic? starts to work correctly.?
The voltage between ground and the voltage multiplier output itself will be the 'green circle' reading, and that will probably remain the same - at 68.7v - under both operational states.? (working and not).??
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On Wed, Oct 30, 2024 at 01:53 AM, Heinz wrote:
On Wed, Oct 30, 2024 at 08:23 AM, Arjay1949 wrote:
What voltage at the actual capsule termination itself?...
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Just to avoid any misunderstandings. Could you please be more specific. Where exactly should the measurement be taken?
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Another question would be when the measurement should be carried out. When the problem occurs, during the warm-up phase (this morning it took around 15 minutes...) or when the microphone is working?
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Many thanks!
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Heinz
