In the spirit of DIY, I acquired a couple of very low cost microphone circuit boards, notwithstanding I can find no specific information about them. I do not mind experimenting, but I hesitate to just hook a bunch of capsules to them before asking if anyone can provide some clue as to what type is most appropriate. I just loathe the prospect of letting the all-important functional smoke out by an inappropriate pairing. So, before I try my best guess, perhaps someone can suggest what type of capsule I should try first? Hint: My objective is to build a home-brewed pencil style condenser like the one I built last Summer and disclosed in this forum.) While I am interested in knowing more about both of them, the second one with the three XLR pins is my first choice to start with, but I am unsure whether these are intended for low bias voltage from a sound card or 48 volts phantom power from a mixer. I am also unsure whether I need a FET type electret capsule, or can use one with the FET (like a left over BM-800 type capsule). (I am still a novice in reading schematics and analyzing circuit components, hoping to learn more as I go along.)
Thanks in advance for pointing me in the right direction. James
![IMG_6786.JPG IMG_6786.JPG](https://cdn.imagearchive.com/groupdiy/data/attachments/80/80235-e973f5f8dea4e226da3ab0791b357123.jpg)
![IMG_6782.JPG IMG_6782.JPG](https://cdn.imagearchive.com/groupdiy/data/attachments/80/80236-50c57a7654e8d5d48857d6d8164c4aed.jpg)
Thanks in advance for pointing me in the right direction. James
![IMG_6786.JPG IMG_6786.JPG](https://cdn.imagearchive.com/groupdiy/data/attachments/80/80235-e973f5f8dea4e226da3ab0791b357123.jpg)
![IMG_6782.JPG IMG_6782.JPG](https://cdn.imagearchive.com/groupdiy/data/attachments/80/80236-50c57a7654e8d5d48857d6d8164c4aed.jpg)