PCBA Consumer Electronics Stylus For Turntables SMT Printed Circuit Board Assembly

PCBA  Images

About TECircuit

Found: TECircuit has been operating since 2004.

Location: An electronics manufacturing service(EMS) provider located in Shenzhen China.

Item: Customizable EMS PCB, offers a full range of one-stop shop services.

Service: Printed Circuit Board (PCB)and Printed Circuit Board Assembly(PCBA), Flexible Printed Circuit Board(FPC), Components Sourcing, Box-Building, Testing.

Quality Assurance: UL,ISO 9001, ISO 14001, ISO 13485, ITAF 16949 andcomplied with ROHS and REACH.

Factory Pictures:
Company's own plant : 50,000 sqm; Employees : 930+; Monthly production capacity : 100,000 m2

PCBA  Applications

• High-Fidelity Analog Audio Playback: The PCBA serves as the critical electromechanical transducer that converts the physical modulations of vinyl record grooves into accurate electrical audio signals. It captures the full frequency range (20-20,000 Hz) and dynamic nuances of analog recordings for faithful musical reproduction .

• Archival Vinyl Digitization and Preservation: Enables the conversion of analog vinyl collections to digital formats by providing a clean, accurate signal to recording interfaces. This allows collectors and libraries to preserve rare recordings and make them accessible in modern digital formats.

• Professional DJ and Performance Applications: Powers the cartridge's ability to withstand the rigors of back-cueing, scratching, and extended playback in professional DJ environments. The PCBA's robust construction ensures consistent output and reliable channel separation during demanding performance use.

• Audiophile Critical Listening: Serves as the precision component in high-end turntable systems where sound quality is paramount. The PCBA's electrical characteristics (impedance, inductance, output voltage) are carefully matched to phono preamplifiers for optimal signal transfer and minimal coloration.

• Record Grading and Quality Assessment: Used by record dealers and collectors to evaluate the condition and playability of vinyl records. The consistent electrical output allows for accurate assessment of surface noise, groove wear, and overall pressing quality.

• Educational Demonstrations in Audio Engineering: Provides a tangible example of electromechanical transduction for students studying audio engineering, demonstrating how mechanical vibrations are converted to electrical signals through magnetic principles.

PCBA Features 

1. Moving Magnet or Moving Coil Generator: The PCBA incorporates either a moving magnet (replaceable stylus with magnet attached) or moving coil (fixed magnets with coils on the stylus cantilever) generator system. Moving magnet designs offer higher output (typically 2.5-5 mV) and replaceable styli, while moving coil designs provide lower output but potentially finer detail retrieval .

2. Precision Coil and Magnetic Circuit: Features precision-wound coils with specific impedance characteristics (e.g., 2.8 kΩ impedance at 1 kHz, 410 Ω DC resistance, 400 mH inductance) that determine the cartridge's electrical interaction with the phono preamplifier and overall frequency response .

3. Stylus Tip and Cantilever Assembly: Integrates a precisely ground stylus tip (conical, elliptical, or line contact shapes) bonded to a lightweight cantilever. The stylus shape determines how accurately it traces the groove modulations, with more advanced profiles offering improved high-frequency tracking and reduced distortion .

4. Output Voltage and Channel Matching: Provides a standardized output voltage (e.g., 3.5 mV at 1 kHz, 5 cm/sec.) with tight channel balance specifications (e.g., within 2.5 dB at 1 kHz), ensuring consistent left/right stereo imaging and proper phono stage loading .

5. Compliance and Tracking Force Optimization: The mechanical compliance of the cantilever suspension is engineered to work with specific tracking force ranges (e.g., 1.0-1.5 grams). This ensures proper groove contact without excessive wear to either the stylus or the vinyl record.

6. Integrated Mounting and Alignment System: The PCBA incorporates the mechanical mounting structure (standard 1/2-inch or P-mount configurations) that ensures precise alignment of the stylus in the groove. Proper azimuth, overhang, and vertical tracking angle (typically 20 degrees) are essential for optimal performance .

7. Electromagnetic Shielding and Output Terminals: Includes effective electromagnetic shielding to minimize hum and external interference pickup, along with gold-plated or high-quality output terminals (typically four-pin for stereo) that maintain signal integrity to the tonearm wires.

8. Recommended Load Impedance and Capacitance Matching: Specifies optimal electrical loading conditions (e.g., 47,000 ohms impedance, 100-200 pF capacitance) that must be provided by the connected phono preamplifier to achieve the designed frequency response and channel separation (e.g., 18 dB at 1 kHz).

FAQ

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