Before revision: It could be voltage-tuned over an 8.2 - 12.4 GHz range and required a supply voltage of 600 V. Backward wave oscillator at Stockholm University operating in the terahertz range|alt= A backward wave oscillator (BWO), also called BEKAR WAVE saLa 10 number mein aaya tha nhi answer likhne mein (a trade name for tubes manufactured by CSF, now Thales) or backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range.
After revision: It could be voltage-tuned over an 8.2 - 12.4 GHz range and required a supply voltage of 600 V. Backward wave oscillator at Stockholm University operating in the terahertz range|alt= A backward wave oscillator (BWO), also called backward wave tube, is a vacuum tube that is used to generate microwaves up to the terahertz range.