Proa

VHF Band TV Transmitter Circuit Diagram

A VHF band TV transmitter application abrogating complete accentuation and PAL video modulation. This is acceptable for countries application TV systems B and G.

Notes:

The abundance of the transmitter lies aural VHF and VLF ambit on the TV channel, about this ambit has not been activated at UHF frequencies. The articulate complete arresting contains 5.5 -6MHz by affability C5. Complete accentuation is FM and is accordant with UK System I sound. The transmitter about is alive at VHF frequencies amid 54 and 216MHz and accordingly accordant alone with countries application Pal System B and Pal System G.

•     Diode D1 : BB109
•     Resistor R1 : 10k ohm
•     Resistor R2 : 100k ohm
•     Resistor R3 : 180k ohm
•     Resistor R4 : 4K7
•     Resistor R5 : 15k ohm
•     Resistor R6 : 68 ohm
•     Resistor R7 : 470 ohm
•     Resistor R8 : 39k ohm
•     Resistor R9 : 10 ohm
•     VR1 : 47k ohm
•     VR2 : 22 ohm
•     Capacitor C1-C3, C8 : 0.1 uF
•     Capacitor C4 : 4.7 pF
•     Capacitor C6 : 0.01 uF
•     Capacitor C7 : 5.6 nF
•     Capacitor C9 : 100 pF
•     Transistor T1: BF494
•     Transistor T2:2N3866
•     Trimmer VC1-VC2 : 50p
•     L1 : 4 round 20 cables SWG in plastic with 8mm diameter
•     L2 : 2 round 24 cables SWG
•     L3 : 7 round 24 cables SWG in plactic with 4mm diameter
•     L4 : 7 round 24 cables SWG in ferrid bead