•  
  •  

Simple IF Signal Generator

Here is a versatile circuit of IF signal generator which may be of interest to radio hobbyists and professionals alike.Transistors T1 and T2 form an astable multivibrator oscillating in the audio frequency range of 1 to 2 kHz. RF oscillator is built around transistor T3. Here again a 455kHz ceramic filter/resonator is employed for obtaining stable IF. The AF from multivibrator is coupled from collector of transistor T2 to emitter of transistor T3 through capacitor C3. The tank circuit at collector of transistor T3 is formed using medium wave oscillator coil of transistor radio, a fixed 100pF capacitor C5 and half section of a gang capacitor (C6).

The oscillator section may be easily modified for any other intermediate frequency by using ceramic filter or resonator of that frequency and by making appropriate changes in the tank circuit at collector of transistor T3. Slight adjustment of bias can be affected by varying values of resistors R6 and R7, if required

If there are any problems please contact webmaster@electronic-circuits-diagrams.com

Please share & like

Voltmeter Ammeter Digital Multimeter Panel Meter 4,5 x 2,7 x 2 cm NEW B3
$3.65 Voltmeter Ammeter Digital Multimeter Panel Meter 4,5 x 2,7 x 2 cm NEW B3 picture
Digital LED Ammeter AMP Panel Power Indicator Ammeter DC0-10A Red B3
$2.98 Digital LED Ammeter AMP Panel Power Indicator Ammeter DC0-10A Red B3 picture
85C1 DC 0-15A Rectangle Analog Panel Ammeter Gauge B3
$2.8 85C1 DC 0-15A Rectangle Analog Panel Ammeter Gauge B3 picture
Digital Mini Ammeter Ammeter of power indicator LED Red 0-5A panel meter B3
$2.98 Digital Mini Ammeter Ammeter of power indicator LED Red 0-5A panel meter B3 picture
Auto Range LCD Digital Multimeter Voltmeter Ammeter Ohmmeter Diode Tester H3U1
$28.71 Auto Range LCD Digital Multimeter Voltmeter Ammeter Ohmmeter Diode Tester H3U1 picture