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.
9 Comments
Inge Tako says:
As I website possessor I conceive the subject material here is very wonderful, thanks for your efforts.
Twitter says:
Thank you a lot for providing individuals with an exceedingly unique chance to study content articles and blogs out of this website.
אלרט פיי says:
I feel this is one of the so much significant information for me. And i am satisfied reading your article. However want to remark on some general issues, The website taste is great, the articles is in reality excellent : D. Just right job, cheers
Tomi Engdahl says:
Microphone Circuit Test Oscillator
https://sound-au.com/project50.htm
Sallen-Key Oscillator
http://williamsonic.com/ToneGen/index.html
Tomi Engdahl says:
Phantom Power – What It Is And How It Works
https://sound-au.com/articles/p-48.htm
Phantom power voltage drop???
https://groupdiy.com/threads/phantom-power-voltage-drop.67092/
Tomi Engdahl says:
Mic Circuits From Simple to Professional
https://audioimprov.com/AudioImprov/Mics/Entries/2021/2/5_Circuits_-_Simple_to_Professional.html
Phantom powered FET preamp cable with output buffer
http://www.next.gr/circuits/Phantom-powered-FET-preamp-cable-with-output-buffer-l53389.html
Tomi Engdahl says:
An RF-Circuit for Condenser Microphone Capsules
https://www.beis.de/Elektronik/HF-Mic/HF-Mic.html
This RF-circuit is operating at 7.68 MHz and 48 V phantom power supplied. It is tested with a large diaphragm cardioid capsule from Ralf Falk, who himself is designing a LF tube microphone and with a small diaphragm capsule from a Sennheiser MKH415. (Do not mix up: “RF” stands for “Radio-Frequency”, not for “Ralf Falk”!)
Lots of experiments, gathered experiences and improvements during the development – with quite satisfactory results, to my point of view.
DIY RF Condenser Microphone
Schematic
https://www.amx.jp137.com/index-scheme.html
The schematic shows the current version of the circuitry employed in the creation of this simple amplitude modulated RF oscillator based microphone.
Tomi Engdahl says:
ESP Project 50 Microphone Circuit Test Oscillator
http://wiki.diyrecordingequipment.com/projects/elliott-sound-products-microphone-circuit-test-oscillator/
Tomi Engdahl says:
https://sagittronics.wordpress.com/2019/07/04/simple-phantom-power-preamp-alex-rice-piezo-amplifier/