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TWO TRANSISTORS FM TRANSMITTER

TWO TRANSISTORS FM TRANSMITTER





This is a basic and little Two Transistors FM Transmitter. It is perfect for prepared secret activities for the strip from radio Fm or recipient of VHF. Obviously, the recreational reason likewise exists and the youngsters will revere having a transmitter that permits representing a radio FM put at a removed spot and like this imagine the mystery specialist.

Two Transistors FM Transmitter

Activity of the Two Transistors FM Transmitter


The voice/music caught by the electret mouthpiece, your voice or close individuals' visits, are devilish to the base of the PNP transistor Q1 through C1 (10uF) where is intensified. The resistor R2 together with R3 it decides this enhancement.

Subsequent to having intensified, the sign is expelled from the gatherer of Q1 transistor and naughty to the base of Q2 transistor (NPN), where it regulates in recurrence the sign created by this stage. This stage is an oscillator of high recurrence that works in the portion of FM. Your recurrence is dictated by L1 (0.3uH) and for the change on the variable capacitor (CV).

The got signs, effectively regulated in recurrence, they are evil to a connected recieving wire in the authority of the transistor Q2 (BC557 Transistor).

The scope of the transmitter relies upon this recieving wire, of the bolstering of the circuit and of where it is working. In the open field, with 6 V battery and a recieving wire of around 40 cm of length, this scope of this Tow Transistors FM Transmitter can be 1000 meters. With a littler radio wire, the scope of this transistor will decrease. A typical divider isn't an obstruction for this transmitter.

Circuit DiagramTwo Transistors FM Transmitter




Parts

Transistors:

Q1 – BC557

Q2 – BF494

MIC–receiver electret two terminals

Resistors: (1/4 W, 5%)

R1–4,7 Kω

R2–220 Kω

R3–22 Kω

R4–10 Kω

R5–6,8 Kω

R6–47 Ω

Capacitors:

C1–10 µF/16 V – ELECTROLYTIC

C2–4,7 µF/16 V – ELECTROLYTIC

C3–10 nF – earthenware

C4–4,7 pF – earthenware

C5–100 nF – earthenware

CV–trimmer from 3-30 to 5-50 pF

Different Parts:

L1 – 0.3uH

B1 – 3 to 9 V

Insect – radio wire

Printed Circuit Board With Full Detail is given Below

Two Transistors FM Transmitter Printed Circuit

The most effective method to Make FM Transmitter

Full Discussion about this circuit you can openly examine.

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