HG SD-1446

The HG 1446 is an NPN epitaxial silicon planar transistor designed primarily for land mobile transmitter applications. It is often referred to by its full name, the HG SD1446, and is a popular choice as a replacement transistor in linear amplifiers for CB radios.
Key Specifications
Transistor Type: NPN silicon planar.
Operating Voltage: 12.5 V.
Power Output: 70 W minimum at 50 MHz (some factory ratings list up to 90 W at 28 MHz).
Frequency Range: Specified for 50 MHz characteristics, commonly used in HF/AM/FM applications.
Power Dissipation: 183 W.
Current: 12.0 A device current.
Gain: 10 dB minimum.
Stability: Utilizes emitter ballasting for high stability and ability to withstand high VSWR (Voltage Standing Wave Ratio) conditions.
Applications
The HG SD1446 transistor is used in a variety of radio frequency (RF) applications, especially in amateur radio and CB equipment:
Land Mobile Transmitters: Its primary design purpose.
RF Power Amplifiers: Used in HF and AM linear amplifiers, such as those made by Palomar and Boomer.
DIY Projects: Hobbyists use it in projects like CW-AM-FM-SSB beacon transmitters.

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