Centurion HF Amplifier
Links | SpecificationsThe Model 422 Centurion uses the classic pair of 3-500Z tubes. The RF deck and power supply are combined into a single, attractively styled, 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%.
QSK cw is achieved using relay switching and the proven T/R circuit from the Hercules II. This circuit also makes the Centurion ideal for fast switching digital modes. VOX ssb is silky smooth and virtually noiseless. This versatile control system assures compatibility with all exciters with amplifier control provisions.
A tube-axial fan is used for forced air cooling. Air flow is routed through the power supply as well as the upper and lower sections of the RF compartment. Air inlets and outlets are in the sides and top of the cabinet to optimize low pressure, low noise, air movement.
A dedicated meter for plate current, a multi-meter for plate voltage, grid current and forward or reflected power. A full time 10 element LED bargraph instantly displays peak power output.
The Centurion operates on all bands from 1.8 to 21.5 MHz. 21.5 to 29.7 MHz is enabled with the installation of an expansion board, supplied no-charge upon proof of licensed authority.
A tough, easy to handle, amplifier that doesn’t really mind a little abuse. The Centurion is a great value.
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/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 lmpedances: 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 Compliment: Two graphite anode 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, operate, transmit.
Primary Power: 220-250 Vac @ 15 A.
Size: HWD 7.75" x 15.5" x 20", (19.7 x 39.4 x 50.8 cm)
Weight: 52 lbs (23.6 kg)