Tape Head Pre-Amplifier

Summary of Tape Head Pre-Amplifier


This project features a stereo tape head preamplifier based on the Sanyo LA3161 IC. It amplifies low electrical signals from tape playback heads, providing proper equalization for normal tape playback. The circuit operates on a 9 to 12 V DC power supply with low noise and good ripple rejection thanks to an on-chip voltage regulator. It outputs up to 200 mW with typical input and load resistances of 100 KΩ and 10 KΩ, respectively. The design includes convenient mounting holes, Berg pins for connectivity, and a power-on LED indicator.

Parts used in the Tape Head Pre-Amplifier:

  • Sanyo LA3161 stereo head preamp IC
  • DC decoupling capacitors
  • Resistors between pins 2 and 3 and pins 6 and 7 for equalization
  • Power supply input (9 ~ 12 V DC)
  • Power-On LED indicator
  • Berg pins for power supply, input, and output connections
  • PCB board (49 mm x 38 mm)
  • Mounting hardware (4 holes, 3.2 mm each)

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.

Tape_Head_Pre-Amplifier

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

 

For more detail: Tape Head Pre-Amplifier


About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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