Mullard type YL1071 VHF double beam tetrode (VTB)
1940-1960
Raytheon V.H.F. tetrode, type RK 715 B
Tetrode for use in submerged repeaters
AMPEREX type 8560 ceramic conduction cooled aligned grid tetrode (VTF)
1950-1960
V.H.F. double tetrode, type 829
Purotron beam tetrode, type25L6G
Raytheon type RK4D22 all glass power beam tetrode (VTB)
1940-1960
EIMAC type 4X150A aligned grid TX tetrode (VTF)
1950-1960
Philips QB3.5-750 all glass aligned grid tetrode (VTF)
1950-1960