Tubes

Articles
Title
One Tube Telegraphic Oscillator (T012E)
One Tube MW Receiver (T013E)
Tubes (T011E)
Grid Controlled Rectifier (T010E)
Modulated High-Frequency Oscillator (T009E)
Chatode-Coupled duo Triode Oscillator (T008E)
Experimental Audio Oscillator (T007E)
Staircase Generator (T006E)
Schmitt Trigger (T005E)
Electronic Switch (T004E)
High-Fidelity Audio Amplifier (T003E)
Spiral Time Base Generator (T003E)
Code Practice Oscillator (T002E)
Tubes – How they work (T001E)

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20 minute timer with PUT (CB4254E)
This circuit was found in the ON Semiconductor's Thyristor manual of the 1980s. The high quality...
Signal Injector (CB5889E)
This simple injector circuit can actually be powered by voltages from 3 to 9 V. The frequency is...
Second-Order Low Pass Filter (CB25814E)
This 10 kHz filter is based on a 741 operational amplifier. The circuit is from Electronics Now...