Transistor BF198 NPN, VHF/RF TO-92

Transistor BF198 NPN, VHF/RF TO-92

Transistors

Reference: TRBF198

Part.No: BF198

€0.60

In Stock

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The BF198 is a classic NPN Bipolar Junction Transistor (BJT) in a TO-92 package, purpose-built for VHF/RF applications. Optimized for FM radio preamplifiers, local oscillators, and wideband signal processing up to the FM band (88–108 MHz).

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Description
Product Details

BF198 VHF/RF Transistor – High Frequency Preamplifier & Oscillator

The BF198 is a high-performance NPN transistor from the golden age of RF design, specifically engineered for VHF frequencies. With excellent transition frequency and low feedback capacitance, it excels in FM radio preamplifiers, local oscillators, and wideband RF stages where stability and low noise are essential.

Functions & Applications

VHF/RF Optimized: High transition frequency (ft) for direct antenna-coupled FM signal amplification.
Low Feedback Capacitance: Minimizes self-oscillation and stabilizes wideband RF circuits.
Excellent Noise Figure: Ideal for sensitive preamplifiers and low-signal detection.
Standard TO-92 Package: Through-hole design, easy integration into breadboards and vintage radio projects.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-92
Transition Frequency (ft)	~600 MHz
Collector-Emitter Voltage (Vceo)	20V
Max Collector Current (Ic)	30mA
Power Dissipation (Pd)	100mW
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: How does the BF198 differ from the BF194?
A: The BF198 has a higher transition frequency (ft ~600 MHz vs. ~400 MHz), making it capable of directly handling FM antenna signals, whereas the BF194 is better suited for IF (intermediate frequency) stages.

Q: Can the BF198 be used in modern FM receiver designs?
A: Yes, though modern receivers typically use integrated circuits. The BF198 remains excellent for DIY FM radios, amateur RF projects, and educational breadboard demonstrations where discrete component flexibility is valued.

Notes

Classic VHF RF transistor; ideally suited for vintage FM radio restoration and educational RF projects. Lower current rating than general-purpose small-signal types; design RF biasing with care.

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: NPN
Transistor Case Style: TO-92

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