•  
  •  

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

(2) NEW Sky Electronics SKAP-2C 24VDC Coil Plug In Relay
$18.99 (2) NEW Sky Electronics SKAP-2C 24VDC Coil Plug In Relay picture
INTERMOTOR UC15 IGNITION COIL * NEW IN BOX *
$22.5 INTERMOTOR UC15 IGNITION COIL * NEW IN BOX * picture
Titan 2000XD Metal Detector Bundle w/ Titan 450 Coil, Automax Pinpointer & Case
$135.0 Titan 2000XD Metal Detector Bundle w/ Titan 450 Coil, Automax Pinpointer & Case picture
Global 90-342 Relay, 91-133001-13083, Coil 208/240V, 60 Hz NEW IN BOX
$18.95 Global 90-342 Relay, 91-133001-13083, Coil 208/240V, 60 Hz NEW IN BOX picture
Beacon 90293Q SPDT Type Enclosed Relay, 24Vac Coil Voltage, NEW IN BOX
$9.95 Beacon 90293Q SPDT Type Enclosed Relay, 24Vac Coil Voltage, NEW IN BOX picture