Circuit Bench

Articles
Title
Hartley Oscillator with Bipolar Transistor (CB13
Variable Frequency Oscillator (VFO) (CB13123E)
with the 4024 (VCO)
Sound Pulser (CB13157E)
1 W LM390 Amplifier (CB13196E)
6 V Battery Eliminator (CB13205E)
Broadband Audio Amplifier (CB13213E)
Peak Detector (CB13262E)
Voltage Sensor (CB13307E)
Tunnel Diode Regenerative Receiver (CB13339E)
Variable DC Power Supply (CB13381E)
Field Strength Meter CIR8196S CB13404E (CB13404E)
Astable 2 Hz Pulser (CB13483E)
Product Detector (CB13501E)
Converter from +15 to -12 V (CB13556E)
Function Generator XR2206 (CB13580E)
Random Pulse Generator (CB13024E)
We found this circuit in a publication from the 70s, with some configurations that we think are strange, but that can be changed. For example, trimmer C2 in parallel with capacitor C1 has no effect on the circuit and can be eliminated. The circuit can
5 and 12 V power supply (CB13434E)
Up to 500 kHz Pulse Generator (CB13452E)
Bipolar Zener with the 741 (CB13523E)
Overtone Oscillator 2 (CB13122E)
Long Timer (CB13156E)
12 W Amplifier LM378 (CB13195E)
AC SCR On-Off (CB13226E)
Operational Multi Ammeter (CB13261E)
Pulse Coincidence Detector (CB13278E)
Tunnel Diode Grid Dip Meter (CB13338E)
18 V x 1 A power supply (CB13355E)
TTL Low Power Monostable (CB13482E)

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