3sk41 Datasheet

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The second gate acts as a shield between the input gate and the drain, significantly reducing Miller effect capacitance. This provides better stability and higher gain at VHF frequencies. Automatic Gain Control (AGC):

Due to its age, it is frequently encountered in vintage "hybrid" transceivers (like Kenwood models) and is often replaced with more modern components for better performance. Key Technical Specifications

Before condemning a 3SK41, always verify the biasing voltages on the gates. A failed bias resistor can make a good transistor appear defective. Also, ensure that the tuning capacitor and other passive components in the front‑end are clean and functioning properly. 3sk41 datasheet

If you are a hobbyist, grab a few 3SK41s from surplus stores before they vanish entirely. For new projects, pivot to the BF998 or 3SK299. But for pure vintage authenticity, the 3SK41 remains a small, metal-can legend.

When selecting a replacement, pay close attention to the and the bias requirements (depletion‑mode versus enhancement‑mode), as not all MOSFETs are directly interchangeable.

utilizing active AGC loops.

) between the input gate and the output drain, preventing high-frequency instability and self-oscillation without requiring complex neutralization circuits. 2. Automatic Gain Control (AGC) Capability The secondary gate ( G2cap G sub 2

Historically integrated into VHF/UHF television tuners, FM radio front-ends, and specialized receiver preamplifiers to boost weak airborne signals without drowning them in internal noise.

The 3SK41 typically comes in a specialized 4-pin miniature plastic package (often designated as a variant of the TO-50 or a standard 4-pin RF lead frame). Because it is a high-frequency device, the pinout layout is designed to maximize isolation between the input and output. Do you need help finding a

The key electrical thresholds and operating limits defined in the official include the following core parameters: Drain-Source Breakdown Voltage (

A common alternative used in similar VHF applications. Conclusion