vacuum tube era
- triodeThree-element electron tube
- cathodeElectrode current exits through
- anodeOxidation electrode
- filamentVery thin thread
- glowSteady, soft light
radio · amplifier · electron · glass · warmth · hum · static · dial · broadcast · transistor · oscilloscope · rectifier · heater · chassis · solder · crackle · antenna · shortwave
- Computing Erasdigital age, information age