Highly evacuated electron tube with thermionic cathode and anode for investigating the thermoelectric effect (Edison effect) and measuring the emission current as a function of the heating power applied to the cathode. Also for plotting diode characteristics and for demonstrating the rectifying effect of a diode.
Max. heater voltage: 7.5 V AC/DC Max. Anode voltage: 500 V Anode current: approx. 2 mA at 200 V Anode voltage Glass bulb: approx. 130 mm dia. Total length: approx. 250 mm