This is the catalog page describing the Palomar Instantaneous reading VSWR meter. It isn't inexpensive, but it's good! This meter will indicate the peak and average VSWR, and the peak RF power in the RF system. It is more accurate than the usual analog VSWR meter commonly found in antenna tuners. Being totally electronic, it responds much faster than theusual VSWR meter, thereby allowing you to really see what is happening at the instant the Rife/Bare tube fires, as well as what's happening during the rest of the tubes operating cycle.