Hi,
I linkwitz moded WM61A and pluged it in to the audio interface, but the SNR is very low and the actual signal could be barely heard.
How do I properly wire it to jack connector to make it work? I think I did something wrong.
Thank you in advance
I linkwitz moded WM61A and pluged it in to the audio interface, but the SNR is very low and the actual signal could be barely heard.
How do I properly wire it to jack connector to make it work? I think I did something wrong.
Thank you in advance
The paper has some details of a suitable amplifier too.
https://www.linkwitzlab.com/sys_test.htm#Mic
https://www.linkwitzlab.com/sys_test.htm#Mic
Many people (myself included) have a stash of those Panasonic microphones. 🙂
A DIY microphone project like this is still viable.
Dave.
A DIY microphone project like this is still viable.
Dave.
I don't know about the modification, but the standard WM-61A has a lot of low-frequency noise. That makes it useless as a recording microphone. It is fine for measurement as long as the sound is loud enough.
Ed
Ed
Better move seems to be to buy a decent capsule. I see JLI (and others) make some FETless capsules in the 5mm (ish) sort of diameter. Adding a FET to that is reasonably easy so long as the high impedance nodes are well screened.
What's lost in the "Linkwitz mod" fanfare is that a lot of people don't read Sigfried's paper - he's quite clear that this mod is primarily to reduce the sensitivity by bringing the source into play and allowing for a source follower rather than a common source amplifier (like pretty much all electrets that don't expose the source). I think people imagine that it's some sort of magic, and it does behave more linearly as a source follower, but for recording a rock concert it's hardly going to matter.
What's lost in the "Linkwitz mod" fanfare is that a lot of people don't read Sigfried's paper - he's quite clear that this mod is primarily to reduce the sensitivity by bringing the source into play and allowing for a source follower rather than a common source amplifier (like pretty much all electrets that don't expose the source). I think people imagine that it's some sort of magic, and it does behave more linearly as a source follower, but for recording a rock concert it's hardly going to matter.