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Radio Receiver Circuits
CROSS-OVER FREQUENCY NETWORK FOR LOUD SPEAKER.
Objectives :
To construct crossover frequency network. The lower frequencies up to some predetermined point based on the values of inductor & capacitor would deliver to woofer. High frequencies are passed to tweeter. The intersection of the curves are cross-over frequency.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
IF AMPLIFIER-ALIGNMENT & TESTING METHODS
Objectives:
To construct IF amplifier. The input is taken from any RF generator and observe amplifier output at first stage and observe the output of second IF stage.
Built in regulated power supply: -15V/500mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MIXER STAGE - ALIGNMENT & TESTING METHODS
Objective:
To construct frequency mixer. Connect two different inputs signals at Base (IF frequency) and emitter (Local Oscillator) and the collector output is given to low pass filter to get the beat frequency and observe the wave forms.
Built in regulated power supply: +15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
PRE-EMPHASIS & DE-EMPHASIS CIRCUITS - TESTING METHODS
Objective:
To construct pre-emphasis & De-emphasis circuit and observe the frequency response using CRO. Attenuation in db = - (20 log (e0/ei)
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
TRANSISTOR RADIO RECEIVER
Objectives :
To construct single band transistor radio receiver. It has got antenna, local oscillator, IF amplifier, diode detector and power amplifier to drive the output to loud speaker.
Built in regulated power supply: +5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
