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VHF RF Transmitter 87MHz - 108MHz

@thebugger
3 years ago
https://everycircuit.com/circuit/5319606323118080
Transistors left to right: BF240 2N3866 2SC1971 KV1310 Dual Varicap: 15pF per diode - 7V - 108MHz 25pF per diode - 5V - 97.5MHz 40pF per diode - 2V - 87MHz VCO Slope - 4.2MHz/V Freq ------ Pout --- Pin --- Efficiency 87MHz - 5.5W - 13.9W / 40% 97.5MHz - 7.2W - 13.3W / 54% 108MHz - 6W - 9.72W / 62% Ideas for PLL control: TSA5511 PLL Controller. NodeMCU for display and control of frequency.
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