3sk41 | Datasheet

For those willing to perform a small mechanical adaptation, the BF998R is an N‑channel dual‑gate MOSFET in a SOT‑143 package. It is still in production and has superior noise figure and gain. It can be glued to a small adapter board or carefully soldered to wires to replace a TO‑72 device. Other possibilities include BF960 , BF961 , and BF981 .

In superheterodyne receiver circuits, the 3SK41 operates as a low-noise mixer. The RF signal is fed to G1cap G sub 1 , while the local oscillator (LO) frequency drives G2cap G sub 2

: Before soldering, always verify the pinout (gate1, gate2, source, drain) of any replacement. Different manufacturers may have different lead configurations, even for similarly numbered parts. A multimeter in diode mode can be used to identify the source and drain pins, but an actual transistor tester is strongly recommended. 3sk41 datasheet

in commercial avionics and vintage ham radios.

Designed to minimize internal noise, making it ideal for the front-end stages of sensitive receivers. Common Uses For those willing to perform a small mechanical

This is where the dual-gate MOSFET shines. The gain is controlled by varying VG2.

RF amplifiers, balanced mixers, and signal converters in communication equipment. Key Features: Other possibilities include BF960 , BF961 , and BF981

The signal output. It connects to the primary RF tank circuit or intermediate frequency (IF) transformer setup.

RF signals can drive Gate 1 while a Local Oscillator (LO) injects into Gate 2. The inherent square-law characteristics of the dual-gate FET provide excellent conversion gain with remarkably low intermodulation distortion.

When reviewing the 3SK41 datasheet, the absolute maximum ratings are critical to prevent component failure. Operating beyond these limits can cause permanent damage. Drain-Source Voltage Gate 1-Source Voltage Gate 2-Source Voltage Drain Current Total Power Dissipation Storage Temperature -55 to +150 3. Electrical Characteristics Under typical operating conditions (usually at ), the 3SK41 exhibits the following performance: Forward Transfer Admittance (

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