Description
The Zaerix 5725 is a miniature 7-pin pentode vacuum tube designed for use in audio amplification and signal processing applications. Known for its low distortion and noise characteristics, it is suitable for high-fidelity audio circuits and vintage equipment restoration.
Key Specifications:
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Heater Voltage: 6.3V
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Heater Current: 0.6A
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Base Type: 7-pin miniature (B7G)
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Function: Pentode
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Applications: Audio amplification, signal processing, vintage equipment restoration
Performance Characteristics
The Zaerix 5725 tube exhibits low microphonics and leakage noise, making it ideal for sensitive audio applications. Its sharp-cutoff pentode design ensures efficient signal amplification with minimal distortion.
Availability and Purchasing
The Zaerix 5725 tube is available from various suppliers specializing in vintage radio components. It’s advisable to purchase from reputable sources that offer new-old-stock (NOS) tubes to ensure quality and authenticity. When sourcing this tube, consider the supplier’s reputation, return policy, and customer reviews to make an informed purchase decision.




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