Tape Head Pre-Amplifier

Rajkumar Sharma      http://www.rajkumarsharma.com  
33

Tape_Head_Pre-Amplifier_A

This project is a tape head Pre-Amplifier circuit.

Description

The circuit is built around a popular Sanyo’s stereo head preamp IC LA3161. Low electrical signals from the playback heads are fed to pins 1 and 8 of IC1 via DC decoupling capacitors, respectively. Components between pins 2 and 3 and pins 6 and 7 provide adequate equalization to the signals for a normal tape playback.

Specifications:

  • Power supply: 9 ~ 12 VDC @ 20 mA
  • Output power: upto 200 mW
  • Input Resistance – 100 KΩ (Typ), Load Resistance – 10 KΩ (Typ)
  • Low noise, good ripple rejection owing to the on-chip voltage regulator
  • Berg pins for connecting power supply, input and output
  • Power-On LED indicator
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 49 mm x 38 mm

Schematic

Tape_Head_Pre-Amplifier_B

Parts List

Tape_Head_Pre-Amplifier_E

PCB

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