In this video, I’ll show you how to make a simple FM signal booster using the BF199 high-frequency transistor. This circuit improves weak FM radio signals and enhances reception across the full FM band (88–108 MHz).

It’s a broadband Class A RF amplifier that can be easily made using common components and a hand-wound 100nH inductor. Perfect for boosting indoor reception or DIY FM receivers!

What you’ll learn in this video:

Circuit diagram and explanation

How to wind a 100nH inductor

Testing the booster with an FM radio

Tips for best performance


Parts Used:

BF199 NPN Transistor

100nH air-core inductor

10nF ceramic capacitors

470Ω & 200Ω resistors

9V–12V DC power supply


Important Note:
This project is for receiving FM signals only. Transmitting or boosting an FM transmitter without a license is illegal in India and many other countries.

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