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Enigma Component Shop Ltd

Enigma Component Shop Ltd

300W FM Broadcast Reference Design using the BLF278

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$21.00

Color

Black

Quantity

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Broadband 300W FM amplifier: Delivers strong, clear audio for FM radio applications
Microcontroller controlled: Enables precise monitoring and protection features
On-board 2-stage thermal and SWR protection: Safeguards the amplifier from overheating and poor SWR
High efficiency operation: Reduces heat and extends component life
Direct antenna connection: Simplifies installation for professional and hobbyist use

Summarized by Shop

NOT FOR SALE IN THE UK
The FM300v2 is a broadband 300W amplifier for the FM broadcast band. We've recently managed to source a quantity of used BLF278 transistors at a great price, so have provided a reference design so that a low-cost, high performance amplifier can be constructed from the plans provided here.
This design is available a

Operating Band: 87.5–108 MHz
Output Power: 320 W typical
Power Gain: 25 dB typical
Gain Flatness: ±1.3 dB
Efficiency: 68% (73% at 320 W)
DC Current Consumption (Main Supply): 8.5–10.5 A (9.5 A typical)
DC Current Consumption (Pre Drive): 12–15 V, 1 A
Input Power: 0.5–1 W
Harmonic Output: 74 dBc typical

Summarized by Shop

Enigma Component Shop Ltd

Enigma Component Shop Ltd

Enigma Component Shop Ltd

4.8 (4)