DVD Signals RF Modulator
DVD Signals RF modulator circuit which also can be used as a RF modulator.
The brightness can adjusted by trimming the P1, P2 control the contrast of video signal. The circuit output is RF modulated and can be receive in VHF band.
Parts
Resistor:
R1_____________33K
R2_____________22K
R3,R9__________470
R4_____________1K
R5_____________220
R6_____________270
R7_____________150
R8_____________6K8
R10,R11________100
R12____________1K5
R13____________68
Capacitor:
C1,C6__________22p
C2_____________120p
C3,C4,C5_______8p2
C7_____________33p
Diode:
D1_____________1N4148
Potentiometer:
P1_____________2K5
P2_____________1K
Cristal:
X1_____________27MHz
Inductor:
L1_____________1uH
Transistor:
T1,T2__________BF494
T3_____________BFY90
[source:Free-Circuit]