
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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