Meinl Percussion has produced a series of introductory pandeiro lessons with Scott Kettner, each prominently featuring his Bowen Frame Drum Microphone.
An invaluable resource of all levels of players and enthusiasts, check it out: http://www.pandeiro.com
Here is an old blurry photo of a microphone I made for Cyro Baptista:
It’s the same microphone design I use for frame drums, but with a modified capsule more suited to the mid-rangy frequencies of the instrument. Also featuring an elongated clamp that positions the microphone in the sweet-spot for picking up the instrument’s characteristic ‘wau-wau’ sound at the gourd’s mouth.