Hi all. I have two old MK-012s which were modified by Michael Joly quite some time ago. Recently one of them developed this problem. There's random low level whine. Attached is the recording of it, normalized to - 3 dB.
https://1drv.ms/u/s!AtSsRNK67O3dkzr_vo53TiXHd0KV
I can't reproduce the problem. Sometimes it's there, other times it's not. Sometimes my hand touching the metal XLR connectors at the mic makes the noise lowder, other times there's no noise no matter how I touch it.
The other MK-012 never behaves like that. Swapping capsules makes no difference. The problem remains with different cables. Other microphones connected via same cables never behave like that. It's this one microphone, and it happens randomly. Proximity of my phone to the mic makes no difference. I cleaned all connectors with Dioxit. I've also inspected all soldering etc under a microscope and there are absolutely no issues.
I'm using RME Babyface Pro.
My knowledge in circuitry is somewhat limited (but my soldering skills are great, and I have good soldering equipment at my day job). And, of course, Michael Joly quit any microphone related projects long ago...
So I need your help in finding what is causing this. Any idea?
Here are the pictures:
https://1drv.ms/f/s!AtSsRNK67O3dkzuzD6pTE2cWIhaV
https://1drv.ms/u/s!AtSsRNK67O3dkzr_vo53TiXHd0KV
I can't reproduce the problem. Sometimes it's there, other times it's not. Sometimes my hand touching the metal XLR connectors at the mic makes the noise lowder, other times there's no noise no matter how I touch it.
The other MK-012 never behaves like that. Swapping capsules makes no difference. The problem remains with different cables. Other microphones connected via same cables never behave like that. It's this one microphone, and it happens randomly. Proximity of my phone to the mic makes no difference. I cleaned all connectors with Dioxit. I've also inspected all soldering etc under a microscope and there are absolutely no issues.
I'm using RME Babyface Pro.
My knowledge in circuitry is somewhat limited (but my soldering skills are great, and I have good soldering equipment at my day job). And, of course, Michael Joly quit any microphone related projects long ago...
So I need your help in finding what is causing this. Any idea?
Here are the pictures:
https://1drv.ms/f/s!AtSsRNK67O3dkzuzD6pTE2cWIhaV