4CX350A/3821, Radial Beam Power Tetrode

4CX350A/3821

The 4CX350A/8321 is a "Radial Beam Power Tetrode", has a 350 watts plate dissipation (max) and is intended for Class AB Audio or RF amplifier service. It is externally identical to the 250B model but contains very rugged internal construction features. Amplification factor and cathode area have been increased over the basic 250B model to give a higher transconductance and figure of merit. This unit is used but tested in excellent shape. $85.00

Description:
   - Plate dissipation (max)        350 watts
   - Screen dissipation (max)         8 watts
   - Grid dissipation (max)           0 watts
   - Amplification factor            13
   - Frequency, CW (max)            110 MHz
   - Filament/Cathode            Oxide Coated
         Voltage                    6.0 volt
         Current                    2.9 amp
   - Capacitance             Grounded Cathode
         Input                     23.6 pF
         Output                     5.6 pF
         Feed-through              0.03 pF
   - Cooling                       Forced Air
   - Base                       9-pin Special
   - Air Socket                       SK-600A
   - Air Chimney                      SK-606
   - Length              2.47 inch / 62.60 mm
   - Diameter            1.64 inch / 41.60 mm
   - Weight                   4 oz / 113 gram