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the 8873 is a compact high-mu power triode intended for use in zero bias class b or ab amplifiers in audio or radio frequency applications, but may also be used in class c service or as a pulse modulator or regulator. the 8873 is designed for conduction cooling and is nominally rated for 200 watts of anode dissipation. a beryllium oxide thermal link is available to insulate the anode from the heat sink while allowing for heat conduction from the anode to the sink. operation with zero bias simplifies associated circuitry by eliminating the bias supply. in addition, grounded grid operation is attractive since a power gain as high as twenty can be obtained.
characteristics
plate dissipation (max.) 200 watts
screen dissipation (max.) --- watts
grid dissipation (max.) 5 watts
frequency for max. rating (cw) 500 mhz
amplification factor 240
filament/cathode oxide coated
voltage
current 6.3 volts
3.0 amps
capacitance grounded grid
input
output
feedthrough 20.5 pf
6.0 pf
.03 pf
capacitance ---
input
output
feedthrough --- pf
--- pf
--- pf
cooling conduction
base 11 pin with ring
air socket sk-1900
air chimney ---
boiler ---
length 2.14 in; 54.41 mm
diameter 1.64 in; 41.66 mm
weight 4.0 oz; 113 gm
