Willen
Well-Known Member
This is simple AV to RF modulator. It has no ICs, has no regulators, has bad rectifier (single or double diode only). I am showing this device because I don't have schematic. It looks very basic circuitry. It has simple power supply from 220V AC to DC may be 9V (see left down side). There are three '9018' UHF small transistors as an oscillator for audio and video.
So it is a basic transmitter just like my basic FM transmitter. When I received the signals from this device on TV, it was very clear in sound and video without AC noises, how?
But If I used this type of AC to DC SMPS to power my basic FM transmitter, it produced horrible noises.
Seeing this simpler device I guessed I can use this type of SMPS to power my basic FM Tx without having any AC noises with little tricky circuit.
Do you know anything? Please!
So it is a basic transmitter just like my basic FM transmitter. When I received the signals from this device on TV, it was very clear in sound and video without AC noises, how?
But If I used this type of AC to DC SMPS to power my basic FM transmitter, it produced horrible noises.
Seeing this simpler device I guessed I can use this type of SMPS to power my basic FM Tx without having any AC noises with little tricky circuit.
Do you know anything? Please!