New Line Techtalk Phantom Supply web page shows how to build a very simple design for a phantom supply. Now since the question was for a simple phantom supply, fed by batteries, the choice was made to use two 9V batteries (since a lot of microphones can be run from phantom voltages as low as 10V).
On the same web page there is also another circuit for powering electret microphones is by means of “T-power”.
You can find more information on microphone powering at my document Powering microphones.
Such a usefule blog
I read Microphone powering ideas « Tomi Engdahl’s ePanorama blog on Friday and found it time well spent. I’ve been looking to see what’s out there about build my own web page and your info stood out.
Could you go into more detail on this? Btw, the advice you gave me is really good.
If you don’t learn the right way from the very beginning it’s going to catch up with you eventually. I was interested to read your post Microphone powering ideas « Tomi Engdahl’s ePanorama blog and gratified to see some of your points.
Every Jo Schmo thinks they can build a website these days, well they can, they’re right about that. I just wish some of them would take some advice from people like you though and then perhaps we wouldn’t have quite so many horrendous ones out there!