Microphones schematics and documents


Posted on Feb 5, 2014

The power supply was built into the base of the mic which can lead to hum issues despite the on-board potentiometer that acts as a `null`. This also means that the mic has two cables running from it - one for power and one for audio. Both mics use two-stage head amplifiers based around an ECC83 tube, and both have unbalanced outputs. Here are the official schematics for the M1 and M4 mics.


Microphones schematics and documents
Click here to download the full size of the above Circuit.

The M5 seems to have been the `Studio` version, with an external power supply and output transformer for balanced low impedance operation. I haven`t seen a factory schematic for the M5, but this is a drawing that I traced out from a specimen on the bench.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Frequency limit detector
    Microcomputer-To-Triac Interface Circuit
    Arduino multi-mode lamp with soft touch switch
    A Fluid Sensor
    zener diode tester schematic
    telephone call voice changer
    Battery charger using LM350
    AVR Serial Port Programmer
    110dB Beeper Circuit
    Pulse Width Modulation
    APH-1050 Power Amplifier
    High Power Solid State Amplifier
    Making a Remote Controlled Car using Sun SPOT



    Top