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Centurion Model 422 Linear Amplifier

Description

QSK amplifier using 3-500Z tubes. The RF deck and power supply are combined into a single desk top cabinet. The power output is rated at 1300 watts on ssb, 1000 watts cw and 650 watts using “key- down” modes. Drive required for full power ssb operation is 100 watts. The duty cycle is 50%.

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Specifications

  • Band Coverage: 1.8 - 2.0, 3.2 - 4.7, 6.5 - 10.3, 13.4 - 19.6, 17.6 - 21.5 MHz, 21.5 - 29.7 MHz after authorized modification.
  • Input Power: 2000 watts, maximum.
  • Power Output: 1300 watts SSB, 1000 watts CW, RTTY and SSTV 650 watts, 50% duty cycle.
  • Drive Power: 100 watts for full rated output.
  • Efficiency: 50 - 65%, depending on frequency and load impedance.
  • Input/Output Impedances: 50 Ohms, unbalanced, SWR < 2:1.
  • Distortion: -35 dB from 1 kw RF output level.
  • Harmonics: -50 dB typical.
  • CW Break-in: QSK capable, Relay switching.
  • Tube Complement: Two Eimac 3-500Z.
  • Power Amplifier Circuit: Class AB2, grounded grid.
  • Plate Voltage: 3100 volts, no load. 2600 volts, full load.
  • Cooling: Forced air with full chassis air flow.
  • Metering: Dedicated plate current meter. Selectable multi-meter for plate voltage, grid current, forward or reflected power. Ten element LED bargraph display for peak power indication.
  • Front Panel Status Indicators: Standby, operator, transmit.
  • Primary Power: 220 - 250 VAC @ 15 A, 110 - 125 VAC @ 30 A, 50/60 Hz. For full power operation, 220 - 250 VAC strongly recommended.
  • Circuit Protection: Primary line fuses. Plate transformer primary interlock and high voltage shorting bar.
  • Front Panel Controls: Power on/off, standby/operate, control mode select (QSK - PTT/VOX), plate TUNE and LOAD, band switch, meter switch.
  • Tune and Load Controls: 6:1 vernier drives with calibrated dial skirts.
  • Construction: Aluminum chassis, front and rear panels, interior partitions and top and bottom covers.
  • Size: HWD 8.25" x 15.25" x 18.5" (20.3 x 38.7 x 46.9 cm)
  • Weight: 47 lbs (21.3 kg)

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