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Tape Head Pre-Amplifier
author: Rajkumar Sharma

This project is a tape head Pre-Amplifier circuit.


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.


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




Parts List

PCB Design

PCB bottom layer






120x90 spot



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