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Title
Small Power Amplifier (T1679E)
4-tube reflex (T1662E)
Pocket Analyzer (T1584E)
4W Amplifier (T1516E)
Electronic flasher (T1288E)
Intermittent Alarm (T1158E)
Timer (T1171E)
Stroboscope (T1752E)
Pocket Tube Radio (T1621E)
Electronic Flash (T1342E)
Battery Charger (T1300E)
Preamplifier (T1222E)
2-tube super heterodyne (T1210E)
Miniature Tube Amplifier (T1183E)
Commercial Sweep Generator (T1781E)
Grid dip (T1741E)
VTVM or converter (T1719E)
Amplified Wheatstone Bridge (T1680E)
Bias power source (T1585E)
UV201A reflex receiver (T1558E)
Modulated light receiver (T1532E)
Small Amplifier (T1517E)
Oscillator (T1289E)
Audio Amplifier (T1244E)
Relaxation with tube (T1753E)
Complex reflex receiver (T1663E)
Tube Transmitter (T1622E)
Signal Generator (T1343E)
AC DC Amplifier (T1301E)
Signal injector (T1223E)

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Simple 1-transistor oscillator (CB23615E)
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Car Air Conditioner (CB15130E)
This circuit controls a fan in the car, according to the temperature, activating it automatically when the...
Telephone Spy II (CB18494E)
In relation to the previous circuit (CB18493E) this spy has an extra transistor, which can be a...