vacuum tubes, capacitors, magnetrons, crt, penta, electron tube, power grid tube, planar triode, fixed vacuum capacitor, variable vacuum capacitor, spark gap, rectifier, hydrogen thyratron, thyratron, klystron, triode, tetrode, cold cathode, pentode, ignitron, cathode ray tube

penta laboratories is a manufacturer and distributor of electron tubes, including vacuum tubes, capacitors, magnetrons and crt for broadcast, industrial, marine and avionics applications worldwide.