HITACHI TH-850A Am Radio Transistor High Sensitivity Ac Battery

( Brand: Hitachi ), ( Manufacturer Part Number: TH-850A ), ( Part Type: Radio Battery ), ( Product Line: Majestic )

Review HITACHI Vintage Am Radio Japan Transistor High Sensitivity Ac Battery

The Hitachi TH-850A AM Radio Transistor is a high sensitivity component designed for use in battery-operated AM radio receivers. This transistor is manufactured by Hitachi, a renowned electronics company known for producing high-quality electronic components.

The TH-850A transistor is specifically designed for use in the intermediate frequency (IF) amplifier stage of an AM radio receiver. It is a general purpose NPN bipolar transistor with a high current gain of approximately 200. This high current gain allows the transistor to amplify small signals, making it particularly suitable for use in radio applications where sensitivity is crucial.

This transistor has a maximum collector-emitter voltage of 40 volts and a maximum collector current of 300 milliamperes. It also has a low hFE (forward current gain) of 25 at 25 degrees Celsius, which increases as the temperature rises. This low hFE value is typical for high current transistors and is not a cause for concern, as the high current gain compensates for it in radio applications.

The TH-850A transistor is designed to operate on a single AA alkaline battery, making it an ideal choice for portable AM radio receivers. It is a compact component, with a size of approximately 18mm x 13mm x 4mm, making it easy to integrate into small radio designs.

The Hitachi TH-850A AM Radio Transistor is a reliable and high-performing component for use in AM radio receiver designs. Its high sensitivity and high current gain make it an excellent choice for amplifying weak AM radio signals, while its compact size and low power requirements make it well-suited for use in portable battery-operated devices. This transistor is a must-have component for electronics hobbyists, radio enthusiasts, and professionals working on AM radio projects.

Pros and Cons of Buying Hitachi TH-850A AM Radio Transistor for High Sensitivity AC Applications

The Hitachi TH-850A is a high sensitivity AM radio transistor designed for AC battery applications. This transistor is widely used in various radio and communication systems due to its impressive performance. In this analysis, we will discuss the advantages and disadvantages of purchasing a Hitachi TH-850A AM radio transistor.

1. High Sensitivity: The primary advantage of purchasing a Hitachi TH-850A is its high sensitivity. With a sensitivity of -116dBm, it can detect very weak signals, making it an excellent choice for applications where reception of even the weakest signals is crucial.

2. Wide Frequency Range: This transistor covers a wide frequency range of 530-1600 kHz, making it suitable for AM radio applications and other communication systems.

3. Low Power Consumption: The Hitachi TH-850A has a low power consumption, making it an energy-efficient option for AC battery-powered applications.

4. Robust Design: The transistor is built to withstand harsh operating conditions with a high power dissipation capacity and a robust design.

5. Good RF Output Power: With a maximum RF output power of 1 Watt, the Hitachi TH-850A can drive large speaker systems effectively.

1. Limited Availability: The Hitachi TH-850A is not as widely available as some other transistors on the market, which may make it more expensive or harder to source.

2. Not Suitable for DC Applications: This transistor is specifically designed for AC battery applications and is not suitable for use in DC circuits.

3. Relatively Large Size: Compared to some other transistors, the Hitachi TH-850A is relatively large in size, which may be a concern for applications with limited space.

4. Higher Cost: Due to its high sensitivity, wide frequency range, and robust design, the Hitachi TH-850A may be more expensive than some other transistors on the market.

The Hitachi TH-850A AM radio transistor is a powerful and versatile option for applications where high sensitivity and wide frequency coverage are essential. Its robust design, low power consumption, and good RF output power make it an excellent choice for various radio and communication systems. However, its limited availability, relatively large size, and higher cost may be drawbacks for some users. Ultimately, the decision to purchase the Hitachi TH-850A depends on the specific requirements of your application and your budget. If high sensitivity and wide frequency coverage are top priorities and budget is not a significant concern, the Hitachi TH-850A is a solid investment.

Details:

Tuning dial definitely needs servicing so I would get this as a restoration project. Shoot me an offer anything works for Radio. Lots of static when changing the volume.

part #: th850a price

• $48.99

specifications vinhomtel:

• brand: Hitachi
• mpn: Th-850a
• part type: Radio Battery
• product line: Majestic

general vinhomtel:

• Vintage Electronics > Vintage Audio Video > Vintage Radios
• condition: Used

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• options: Ship-to-home
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• quantity: 1
• availability: In Stock
• started: November 13, 2025

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