Medium Wave Transmitter Circuit

A generalized schematic diagram of a medium wave transmitter which covers a standard broadcast band 530 1700khz converted from a 4 or 5 valve superheterodyne radio is shown in fig.

Medium wave transmitter circuit.

This long wave radio and medium wave radio receiver circuit diagram is designed using tba120 integrated circuit and common electronic components. Medium wave mw is the part of the medium frequency mf radio band used mainly for am radio broadcasting. Radio workshop 24 009 views. There are two parts comprising this transmitter the rf oscillator and the audio amplifier.

Medium wave band a part of the medium frequency radio band used mainly for am broadcasting with an allocated frequency range of 530 khz to 1610 khz extending to 1700 khz in the western hemisphere. You can adjust the resonant frequency by varying the amount of inductance in the coil or the capacitance of the capacitor. The spectrum provides about 120 channels with limited sound quality. Generalized schematic diagram of an am transmitter converted from a vintage tube radio.

Medium wave modulator circuit diagram the modulator is designed as an emitter follower that modulates the supply voltage of the output amplifier. Speed of a radio wave in a medium. Decision on rf protocol for two way star network incorporating contention based medium access. An am transmitter for medium wave the spitfire duration.

Propagation in the night allows strong signals within a range of about 2000 km. The audio i e input signal obtained from the mic is passed through the base of the transistor in order to modulate the output signal of the lc circuit in fm i e frequency modulation wave form. As the medium wave band is still mono the two input channels are merged. The potentiometer can be adjusted to obtain the least distortion and the best sound.

The transmitter circuit is capable of storing the energy for the oscillation as it is a derived from the inductor and capacitor lc circuits. 13 8 kv medium voltage issue. In simple radio receiver circuits the tuning is adjusted by varying the number of turns of wire in the coil. Medium wave transmitter constuction problems.

If the frequency of the oscillations is high enough in the radio frequency range above about 20 khz the oscillating coupled electric and magnetic fields will radiate away from the antenna into space as an electromagnetic wave a radio wave. A radio transmitter is an electronic circuit which transforms electric power from a power source into a. Radio communications digitally driven medium wave am transmitter with circuit diagram. Tuning stage of this long wave radio and medium wave radio receiver also serves as active antenna that can be favorably positioned to get the best reception possible.