INSTEAD OF A MICROPHONE — DYNAMIC HEAD

INSTEAD OF MICROPHONE — DYNAMIC HEADWhen there are dynamic microphone, you can substitute any small-sized dynamic head. Here’s what proposes to make to the Yugoslav magazine “Radio Amater”. Since the voltage developed by the head, a little, pre-amplify with low-yield of germanium, for example, МП39— МП42, or silicon (KT361, КТ203, КТ104) of the transistor included in the scheme with a common base. For normal operation of the cascade is necessary to select the resistance of the R1 resistor value such that the voltage at the collector of the semiconductor device was approximately half the voltage of the power supply.

Recommend to read

  • THE GERMAN-CONTROLLED TORPEDOESTHE GERMAN-CONTROLLED TORPEDOES
    The development of guided torpedoes to sabotage units of the German fleet was conducted in parallel with the creation of the midget submarines. The first model of this weapon was...
  • THE SEAT TO THE BATHTHE SEAT TO THE BATH
    If the family is elderly or disabled, they are for convenience (and perhaps facilitate) the adoption of water treatments will not prevent a simple seat on the sides of the bath. The seat...