Linear power amplifier tetrode
8973
CPI
high powered medium frequency or high frequency
broadcast service and a very low frequency
communication in the half megawatt power range.
The 8973 has a thoriated tungsten filament mounted
on water-cooled supports. Large diameter
coaxial terminals are used for the control grid and
the RF filament terminals. Filament power and filament
support cooling water connections are made
through special couplings with threaded clamping
rings.
