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Title
Band Pass Filter (CB15477E)
Heads or Tails (CB15426E)
Automatic Voltage Selector (CB15346E)
High Efficiency Regulator 5 V x 1 A 723 (CB15332E)
Active Low Pass Filter MC34071 (CB15294E)
AC Amplifier with 5 V Supply MC33171 (CB15269E)
8 W amplifier TDA1908 (CB15226E)
10 W amplifier TCA940N (CB15216E)
Expander with the L150 (CB15195E)
20 dB amplifier 741 (CB15057E)
Noise Filter (CB15039E)
Oscillator 4011 (CB14983E)
AC Automatic Activation (CB14969E)
27 MHz SW Transmitter (CB14893E)
Tunnel Diode Spy Transmitter 3 (CB14864E)
FET and Operational Mixer (CB14849E)
Amplifier Stage OC71 (CB14750E
Modulated Light Receiver (CB14690E)
Phototransistor Currente Control (3) (CB14641E)
Linear Ramp Generator MC1455 (CB14585E)
FSK receiver (CB14568E)
Transistor Driver MC34071 (CB14482E)
Transistor Driver MC34071 (CB14482E)
5 V x 10 A Regulator LM109 (CB14505E)
1 W LM386 Amplifier (CB15589E)
Shadow Activated Motor (CB15459E)
AC Motor Reversing Circuit (CB15408E)
100 MHz frequency meter ICM7216 (CB15370E)
6 W per Channel Amplifier TDA1521A (CB15390E)
MC34071 Active Band Pass Filter (CB15282E)

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      This circuit for audio signals was found in the March 1990 Radio Electronics magazine. The circuit...

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           The operational amplifiers used in this circuit are old. The circuit is from documentation of the 70's, but...

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