tape head preamplifier with LA3161
The Stereo Tape Head Preamplifier circuit utilizes the LA3161 integrated circuit, which is specifically designed for low-noise audio applications. The power supply requirements range from 9 to 12 VDC, with a current consumption of approximately 20 mA, making it suitable for battery-operated devices as well as wall-powered setups. The output power capability of up to 200 mW allows it to effectively drive subsequent audio circuitry, ensuring adequate signal levels for further amplification or processing.
The input resistance of the preamplifier is typically 100 KΩ, which facilitates compatibility with various audio sources without significant loading effects. The load resistance is typically set at 10 KΩ, optimizing the circuit's performance in terms of frequency response and signal integrity. The low-noise characteristics of the circuit are attributed to the on-chip voltage regulator, which provides stable power to the internal components, thereby minimizing signal degradation due to power supply fluctuations.
Connectivity is simplified through the use of Berg pins, which offer easy integration with other circuit elements for power supply, input, and output connections. This feature enhances the modularity of the design, making it adaptable for various applications. Additionally, a power-on LED indicator is included to provide visual confirmation of the circuit's operational status, which is particularly useful during troubleshooting or setup.
The printed circuit board (PCB) dimensions of 51 mm by 54 mm are compact, allowing for easy installation in a variety of enclosures. The PCB also features four mounting holes with a diameter of 3.2 mm, facilitating secure attachment to chassis or other structural components, thereby ensuring stability during operation. This preamplifier kit is suitable for enthusiasts and professionals looking to enhance audio playback quality in tape-based systems or other audio applications.The Stereo Tape Head Preamplifier kit is based on LA3161 IC from SANYO. Power supply - 9 ~ 12 VDC @ 20 mA. Output power - upto 200 mW. Input Resistance - 100 K? (Typ), Load Resistance - 10 K? (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 51 mm x 54 mm 🔗 External reference
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