2W FM Transmitter

 



Schematic of circuit


This is the schematic for a FM transmitter with 2W output power that can be used between 85 and 110 MHz. Build the transmitter in a RF-proof casing, use good connectors and cable and be aware of all the other RF rules of building. Q1 and Q2 should be cooled with a heat sink. the 22pf variable capacitor is for the frequency adjustment. The another trimmer must be adjusted to maximum output power with minimum SWR and input current.

Component

Value

Q1,Q2

2N3866, 2SC1971 or 2N3553

L1

5 turns of 0.8 mm wireon 5 mm body with ferit core

L2

2-4 turns of ordinary Cu-PVC isolated wire over L1

Note : Local laws in some states, provinces or countries may prohibit the operation of this transmitter. Check with the local authorities

Reference : Max Transmitters

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Last Updated : February 15, 2002 1