similiar fashion the short pulse portion of the pedestal pulse may be generated by an energy storage device such as capacitor 35 charging to a reference voltage approximately twice e ps 2 via a second transformer 36 similarily capacitor 35 may be discharged via a gas tube 37 to produce a short pulse which is transformer coupled to magnetron 24 gas tube 37 may be triggered by the discharge of a capacitor 38 which is similiarly charged to the voltage value on capacitor 31 and discharged through switch 33 by choosing the value of components in the discharge path of capacitor 38 a predetermined delay for the operation of switch 37 may be achieved the long pulse and short pulse circuits are connected to magnetron 24 via an rf choke 41 and capacitor 40 respectively such that interaction therebetween may be minimized the resulting waveform appearing at point e a is illustrated in the accompaning fig4 referring to fig4 waveform e a is indicated by a gently rising voltage at point 42 having a short duration pulse 43 imposed thereon as previously noted the rise time and duration of waveform e a may be controlled by selection of component values in the discharge path of capacitor 31 as will be familiar to those versed in the art the selection of these values will depend upon the particular magnetron type employed similarly the selection of the values of e ps 1 and e ps 2 which ultimately determine the magnitude of waveform e a such that the pedestal portion indicated at 42 holds the.