Transistor AF101 PNP, Germanium RF TO-72

Transistor AF101 PNP, Germanium RF TO-72

Transistor AF101 PNP, Germanium RF TO-72

Transistor AF101 PNP, Germanium RF TO-72

Transistor AF101 PNP, Germanium RF TO-72

Transistors

Reference: TRAF101

Part.No: AF101

€1.20

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The AF101 is a vintage PNP Germanium Transistor in a TO-72 (4-lead metal can) package, specifically designed for RF and IF amplification in classic radio receivers. The fourth lead provides a Faraday shield connection to minimize high-frequency interference.

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Description
Product Details

AF101 Germanium Transistor – Vintage RF/IF Amplifier for Classic Radio Restoration

The AF101 is a historic PNP germanium transistor from the European "AF" series, engineered for high-frequency RF and IF amplification in vintage radio receivers. Its four-lead metal can design includes a Faraday shield connection that suppresses oscillations and interference—making it essential for restoring classic AM/FM tuners.

Functions & Applications

Four-Lead Metal Can (TO-72): Built-in Faraday shield connection reduces RF interference and prevents unwanted oscillations.
Germanium Technology: Delivers lower noise and superior linearity in RF/IF stages compared to modern silicon alternatives.
Vintage Radio Restoration: An authentic replacement for original AF101 components in classic AM/FM receiver repairs.
Historical Significance: Part of the legendary European "AF" series, trusted in professional radio design for decades.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	PNP
Package / Case	TO-72
Transistor Type	PNP Germanium BJT
Polarity	PNP
Package	TO-72 (4-lead Metal Can)
Application	RF/IF Amplification

Frequently Asked Questions

Q: What is the purpose of the 4th pin on the AF101?
A: The fourth lead is internally connected to the metal can and serves as a Faraday shield ground. Connecting it to circuit ground significantly reduces high-frequency interference and prevents parasitic oscillations in RF circuits.

Q: Is the AF101 still suitable for modern DIY RF projects?
A: While primarily a vintage restoration part, the AF101's low-noise germanium characteristics can still be valuable in sensitive RF preamplifiers or restoration projects. Modern silicon equivalents are preferred for new designs due to better availability and temperature stability.

Notes

Vintage NOS (New Old Stock) germanium transistor. Requires careful handling to avoid damage from electrostatic discharge and mechanical shock. Performance may vary due to age and storage conditions; test before critical applications.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: PNP
Transistor Case Style: TO-72

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