![]() ![]() ![]() That involves some precision surgery on the capsule and cutting a thin copper trace that connects one of the two terminals with the capsule casing. According to Linkwitz, much better performance can be obtained from this capsule if we break this connection, wire the capsule with three leads and bias the FET ourselves. In other words, the FET will operate in common source mode. WM-61A capsules have an integrated FET that has its source terminal hard-wired to the capsule casing, which means that it will be grounded when wired with two leads as intended. WM-61A based microphone can be built for less than $20, so it was a great introductory project into the world of mics for me. You can still find some on the eBay (together with a bunch of Chinese clones advertised as the real thing), but there are also good alternatives, such as Primo capsules. Unfortunately, like with some other components that are loved by the DIY community (J201 FETS come to mind), they are discontinued by Panasonic. WM-61A capsules are praised for their super flat response and good signal-to-noise ratio. Projects built around Panasonic WM-61A electret ( datasheet) capsules are on the top of the results when you search for cheap but decent mics. I needed a simple (and cheap) microphone with flat frequency response and decent noise level to record acoustic guitar. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |