•  
  •  

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

520 PCS CAP INC .1K250NP .1MF 10% 250V CAPACITORS
$3.99 520 PCS CAP INC .1K250NP .1MF 10% 250V  CAPACITORS picture
1975 PCS SIEMENS B32571-.068/10/250 .068MF 10% 250V CAPACITORS
$3.99 1975 PCS SIEMENS B32571-.068/10/250 .068MF 10% 250V  CAPACITORS picture
NEW Mars Run Capacitor 25 and 5 uf MFD 370 volt 12261 Motor Run Blower Fan
$15.0 NEW Mars Run Capacitor 25 and 5 uf MFD 370 volt 12261 Motor Run Blower Fan  picture
MILLER 186015 .34 uf Film Capacitor Millermatic Spectrum XMT 304 Invision 354
$119.0 MILLER 186015 .34 uf Film Capacitor Millermatic Spectrum XMT 304 Invision 354  picture
5Pcs 25v 10000uf Radial Electrolytic Capacitor Assortment Kit Set 18x35mm Sc
$4.22 5Pcs 25v 10000uf Radial Electrolytic Capacitor Assortment Kit Set 18x35mm Sc picture