Microphone powering ideas

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).

phantompsu

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.

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  4. 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.

    Reply

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