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Crystal noise generator (T468E)
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Noise generator (T467E)
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Low noise amplifier (T466E)
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Microammeter (T465E)
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Differential amplifier (T464E)
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Voltage inverter (T463E)
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Three-stage differential input amplifier (T462E)
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Oscilloscope voltage amplifier (T461E)
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Servo amplifier (T460E)
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Driver for oscillograph (T459E)
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Voltmeter with high gain amplifier (T458E)
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Tube voltmeter (T457E)
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Gain 10 Voltage Amplifier (T456E)
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Voltage regulator (T455E)
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Servo amplifier (T454E)
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3-stage amplifier (T453E)
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T ube driver (T452E)
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High gain 7 tube stage (T451E)
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6AC7 Amplifier (T450E)
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High gain amplifier (T449E)
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100 dB amplifier (T448E)
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Multi-frequency amplifier (T447E)
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Multi Tube Amplifier (T446E)
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Multi-stage amplifier 3 (T445E)
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multi-stage amplifier 2 (T444E)
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Multi-stage amplifier (T443E)
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Pulse amplifier (T442E)
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Metal detector (T441E)
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Two tube exciter oscillator (T440E)
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Tetrode oscillator (T438E)
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