Details
New old stock twin beam tetrode on 7 pin septar base with two top pin connections. Various brands. The 3E29 is pulse-rated. Our C7SEP is the correct socket and our CPC5 is the correct pin connector.
NSN/FSN = 5960001078147, 5960001143834 (3E29), 5960005534513 (3E29), 5960005534583, 5960006155591
Signal Corps Number = VT-259