Paul, The data sheets indicate use up to 30MC, and use up to 120MC at reduced power levels in CW. Bob - N0DGN On 11/10/2011 6:27 PM, Paul Baldock wrote: > I have a home brew 2 x 813 grid-driven linear amp for 160 and 80. I > would like to modify this for 29MHz. A simple question - will an 813 > work at 29MHz? > > Thanks > > - Paul >