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3-tube regenerative receiver (T930E)
Power Oscillator (T857E)
Detrola Receiver Model 3271 from 1941 (T765E)
4-tube power amplifier (T692E)
1939 GE GB-400 Receiver (T679E)
45W Amplifier (T502E)
15W 4-Channel Amplifier (T500E)
Kinescope Rejuvenator (T464E)
6N7 Tone Control (T1072E)
Regenerative receiver (T968E)
Signal Generator (T954E)
Simple Shortwave Receiver (T824E)
Homemade arc lamp (T788E)
2-Tube Radio (T744E)
Simple Receiver (T729E)
Interflex – Shortwave Radio (T716E)
Recorder Amplifier (T481E)
15W 4-Channel Amplifier (T500E)
Crystal noise generator (T468E)
Noise generator (T467E)
Low noise amplifier (T466E)
Microammeter (T465E)
Differential amplifier (T464E)
Voltage inverter (T463E)
Three-stage differential input amplifier (T462E)
Oscilloscope voltage amplifier (T461E)
Servo amplifier (T460E)
Driver for oscillograph (T459E)
Voltmeter with high gain amplifier (T458E)
Tube voltmeter (T457E)

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