Transmitters
Simple Tv transmitter schematic
This is a small tv transmitter circuit wich trasmittes in VHF, negative sound modulation and PAL video modulation.
It is suitable in countries where the B and G system is used.
88 108 MHz FM transmitter BF982 BF199 BFR90
The most important part of this 88 108 transmitter is the Colpitts oscillator. C3,C4,C5,C6,CD1-CD2 ans L1
determine the transmission frequency. The RF Oscillator circuit has the BF982 MosFet transistor wich is the active part. The others 2 transistors separate the VCO from antenna.
The first stage BF199 amplifies the weak signal from the vco and functions in [...]
Veronica 1W Fm transmitter
Veronica transmitter is easy to build and to operate in FM. Veronica is also known for frequency stability, clean fm signal and uses no integrated circuit.
Veronica transmitter is equiped with a mini-mixer and so you may forget an external mixer. This consist from T1 transistor wich amplifies the microphone signal before it is combined with [...]
