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thebugger
modified 9 years ago

24W VHF Amplifier

7
1
399
04:46:38
Okay, the amp itself is nothing fancy, just a common base rf amplifier, but the most distinguishable trade of these amps is the lack of Miller Capacitance, which in turn increases the bandwidth. Anyway without further explanation I'll get to the specs: - Input impedance - 50ohm - Output Impedance - 50ohm - Input Power - 0.8W - Output Power - ~24W - Gain - 14.6dB - Drawn Power - 50W - Efficiency - not that great, around 50%, primarily because the amp is not in class C, but purely in class A. You rarely see VHF amps working in class A mode, because RF power transistors are costly, and designers tend to suck every last ounce of power they can get from the transistor, but I tend to choose unorthodox solutions when designing circuits, so yeah, here it is.
published 9 years ago
jason9
8 years ago
What do you mean lack of miller capacitance? How does that work?

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