Mullard type YL1071 VHF double beam tetrode (VTB)
1940-1960
Raytheon type RK4D22 all glass power beam tetrode (VTB)
1940-1960
EIMAC type 4X150A aligned grid TX tetrode (VTF)
1950-1960
AMPEREX type 8560 ceramic conduction cooled aligned grid tetrode (VTF)
1950-1960
Philips QB3.5-750 all glass aligned grid tetrode (VTF)
1950-1960
Tetrode for use in submerged repeaters
Marconi triode valve
1927
Mullard triode valve, tetrode
1930
V.H.F. double tetrode, type 829
Raytheon V.H.F. tetrode, type RK 715 B
