Circuit of micro FM transmitter spy with transistor .

That small circuit transmitter (spytoni) it is ideal for ready espionage for strip from radio Fm or receiver of VHF. Of course the recreational purpose also exists and the children will adore to have a transmitter that allows to speak for a radio FM placed at distant place and like this pretend the secret agent.

List material for assembly of the micro fm transmitters with bf494

Semiconductors:
Q1 - BC558
Q2 - BF494

Resistors: (1/8 W, 5%)
R1--4,7 KΩ
R2--220 KΩ (red, red, yellow, Gold)
R3--22 KΩ (red, red, orange, Gold)
R4--10 KΩ (Brown, black, orange, Gold)
R5--6,8 KΩ (Blue, Ash, red, Gold)
R6--47 Ω (Yellow, violet, Black, Gold)

Capacitors:
C1--10 µF/16 V - ELECTROLYTIC
C2--4,7 µF/16 V - ELECTROLYTIC
C3--10 nF - ceramic
C4--4,7 pF - ceramic
C5--100 nF - ceramic
CV--trimmer from 3-30 to 5-50 pF

Several:
MIC--microphone of electret of two terminals
L1--Reel - to see text
S1--simple Switch
B1--3 to 6 V - 2 to 4 small piles
The--antenna - to see text Printed circuit board or bridge of terminals, box for assembly or hollow book, support for 2 or 4 small piles, threads, it welds, etc.
Printed circuit board