WESTERN ELECTRIC 131T Satellite Transistors Fet Nos

( Brand: Western Electric ), ( Manufacturer Part Number: 131T ), ( Country Of Origin: United States )

Review WESTERN ELECTRIC Vintage Transistors Fet Nos Gold Plated

The Western Electric 131T Satellite Transistors, also known as FET NOs (Field Effect Transistors - Narrow Outline), are a vintage component that was once a staple in the electronics industry. These transistors were manufactured by Western Electric, a subsidiary of Bell Laboratories, during the 1960s and were renowned for their high-quality and reliability.

The 131T Satellite Transistors are NPN type, meaning the emission of charge carriers (electrons) is controlled by an applied voltage to a gate terminal, which is separated from the source and drain terminals. The satellite configuration refers to the arrangement of the pins or leads, where the gate terminal is located between the source and drain, and the source terminal is smaller and less prominent. This layout was used to minimize parasitic capacitances and improve the overall performance of the transistor.

The 131T Satellite Transistors have a high input impedance, which makes them suitable for use as amplifying devices or switches in various electronic circuits. They can handle moderate power levels, with a maximum continuous collector current of about 150 milliamperes and a maximum collector-emitter voltage of 30 volts.

The transistors have a TO-3 case, a cylindrical package with a flange, which allows for good thermal conductivity and easy mounting onto a heat sink for improved performance and longevity. Each transistor measures approximately 0.4 inches (10.16mm) in diameter and 0.2 inches (5.08mm) in height.

It is worth noting that the 131T Satellite Transistors are considered obsolete and have been replaced by modern, surface-mount transistors. However, they remain popular among hobbyists, electronics enthusiasts, and vintage equipment restorers due to their historical significance and unique characteristics. When sourcing these components, it is essential to ensure that they are tested and verified for proper function before use in any electronic project.

The Western Electric 131T Satellite Transistors (FET NOs) are a type of field-effect transistor (FET) that was commonly used in telecommunications equipment during the mid-20th century. Here are some pros and cons of buying these transistors for your projects or restorations:

1. Historical significance: These transistors were a key component in the development of early satellite communication systems, making them a valuable addition to any vintage electronics collection.

2. High gain and low noise: The 131T Satellite Transistors are known for their high gain and low noise characteristics, making them ideal for use in amplifier circuits where high gain and low noise are essential.

3. Availability: Despite their age, these transistors are still available on the market from various suppliers, making them relatively easy to obtain.

1. Compatibility issues: The 131T Satellite Transistors are relatively large and have specific pin configurations that may not be compatible with modern circuit boards or components.

2. Limited supply: Due to their age and historical significance, the supply of 131T Satellite Transistors is limited, and prices can be quite high.

3. Fragility: These transistors are quite old, and their physical condition can vary widely. Some may function perfectly, while others may be damaged or require extensive restoration.

The Western Electric 131T Satellite Transistors are a fascinating and historically significant component in the world of electronics. While they offer high gain and low noise characteristics, their compatibility issues, limited supply, and fragility make them a challenging acquisition for some projects. However, for those who are dedicated to restoring vintage equipment or building historical replicas, these transistors are a valuable investment.

If you are interested in acquiring 131T Satellite Transistors, I would recommend carefully considering the specific requirements of your project before making a purchase. Research the compatibility of these transistors with your circuit board and components, and be prepared for potential restoration work. Additionally, consider shopping around for the best price and availability from reputable suppliers.

Details:

QTY 10 - Western Electric Satellite Transistors, 131T, FET, New Old Stock, Gold Plated, Made in Reading PA Plated.

part #: 131t prices

• $15.20-$29.99

specifications vintaelec:

• brand: Western Electric
• mpn: 131t
• country of origin: United States

general vintaelec:

• condition: New
• Consumer Electronics > Vintage Electronics > Other Vintage Electronics

offer vintaelec:

• sold: 0
• options: Ship-to-home
• started: April 19, 2026
• availability: In Stock
• quantity: 1

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• # reviews: 1147
• rating: 100.0%
• city: Coopersburg, Pennsylvania

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• service: USPS Ground Advantage
• type: Fixed
• cost: $0.00

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• method: Money back
• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

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