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Hi! I'm back in town and did the measurement. Across the two capsule wires it's 10.2V when the microphone is working. To check the voltage when the mic is not working, I have to wait until tomorrow

You should make the measurement both when it works and when it doesn't work. If the voltage is not correct when the mic doesn't work, that would mean that the culprit is the bias generator. If the

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

Just to avoid any misunderstandings. Could you please be more specific. Where exactly should the measurement be taken? Another question would be when the measurement should be carried out. When the

What voltage at the actual capsule termination itself?... With a DMM that has an impdedance of c.10M - which is typical- then you you still measure something around 50v across the capsule...

Hi Jan! Here you will find the measurements. Red circle test pad: 15.2 Green circle test pad: 68.7 @Arjay1949 Thanks also for your explanations!

The EM258 has a very useful ouptut at 40KHz.? ?At 80Khz it's almost nothing -- although it will still register something, just above the noise! MEMS microphone capsules like those listed here:

The meter will do the job, though you cannot accurately measure the capsule voltage like Arjay1949 already said. Capsule voltage will indeed be 73V, not 100V or more like I first said. That was based

Primo EM258 goes up to 80 kHz.

Hi all - Any recommendations for cheap-ish electret elements that go up to 40kHz? Thanks!

I have a? Rode NT1 which is very simlar to the NT1A in many respects. There only appear to be minor differences to the schematic linked to in post #2 of this thread. I've had it for about 7 year

Found this thread ( https://youtu.be/0Yl8Wkjhk2Y ) today. It seems I'm not the only one.

Hi Jan. Yeah, it's a pity but not too bad either. ?At least we were able to achieve partial success and I no longer have any interruptions during the recording process. That's really

That's what I thought when I came across a pair of speakers from the 1970th that nobody wanted anymore and that were thrown at me because everyone knew that I like listening to sound and analogue

Hmm, what a bummer! Could very well be the polarization voltage oscillator or voltage multiplier circuit following that oscillator that are not working. That's the 14-pin IC and surrounding parts on

My gut feeling tells me that it could be a defective capacitor. But that's pure speculation. _________________________________________________________ That is my Wild Alex Guess, as well. While I am

After yesterday's long-term recording test, I have good news and bad news. The good news is that there were no unexpected interruptions during the entire recording process. The bad news is that the 3

Supposedly you can solder through this stuff: https://www.amazon.com/MG-Chemicals-Premium-Acrylic-Conformal/dp/B07B8RY7M6 ...I got some for a project but didn't actually end up using it (for other

I would use a blower brush (for camera lenses) and VERY GENTLY remove any loose stuff.? I would NOT USE ANY LIQUID or ANY HIGH PRESSURE AIR. Yes, you might remove some Gold but actually the capsule

Happy to help, no problem! Nice to hear it seems the mic is working properly now!? Enjoy your purchase. Jan