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Philco Amplifier (T904E)
Old common multimeter (T882E)
Capacitance Bridge (T858E)
Headphone Receiver (T800E)
Multi band receiver (T692E)
1939 Power Amplifier (T680E)
Sonic alarm (T526E)
Bass and treble with the 6N7 (T1073E)
Turntable Amplifier (T931E)
Phonograph Oscillator (T825E)
1940s AM and FM Receiver (T716E)
3 mile phone (T711E)
Frequency Marker (T465E)
Simple Receiver (T428E)
Tube Metal Locator (T448E)
VHF Oscillator (T1127E)
Cathode Follower Amplifier (T1030E)
Electronic organ (T1002E)
Low Voltage Receiver (T955E)
Line Amplifier (T788E)
Public Address Amplifier (T766E)
Multimeter from the 1940s (T744E)
Sensor with Thermoscope (T730E)
Phonograph Oscillator (T705E)
Hartley Oscillator (T693E) Found in a 1943 publication, it already used scrap parts at that time. The circuit is powered by the mains and the frequency depends on the components used. img src="images/stories"
25W Amplifier (T495E)
2000V power supply (T1150E)
1-tube Signal Tracer (T1094E)
Amplifier and MW Tuner (T1052E)
Signal Tracer (T969E)

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