TECHNICAL CHARACTERISTICS:
Stabilised tendency of catering: Vcc=12~16V
Frequency of emission: 88~108MHz
Consumption: 100~400mA
Materially:
The resistors are 1/4W.
|
R1, R2 |
10KOhm |
|
R3 |
47Ohm |
|
C1, C2 |
1nF |
|
C3 |
4,7uF/16V |
|
C4, C7,
C8 |
0~45pF
trimmer |
|
C5, C6 |
10pF |
|
C9 |
100nF |
|
L1 |
4
turns, 7mm diameter
* |
|
L3 |
3
turns, 7mm diameter
* |
|
L4 |
5
turns, 7mm diameter
* |
|
L2 |
RFC
(resistance 1MOhm with wrapped around her inductor of
enough coils from fine isolated wire. Scratch of
utmost inductor and you stick in utmost the
resistance making thus a parallel L-r circuit.) |
|
T1, T2 |
2N2219 |
|
ANT |
Simple
dipole l/2. |
|
MIC IN |
Microphone dynamic or other type. (It can also
connected to a cassette player unit) |
* The inductors is air from wire of coaxial 75W or
other 1mm roughly.
Regulations:
With the C4 we
regulate the frequency.
With their C7, C8 we
adapt the resistance of aerial (practically to them
we regulate so that it is heard our voice in the
radio as long as you become cleaner).
Notes:
The T2
wants refrigerator.
|
