4 KW HF LINEAR AMPLIFIER with GU-78B by SV8JE

Modification of an RFD-1A (TMC) Linear Amplifier

PL-8295 has been replaced with GU-78B to increase power
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Typical Operating Characteristics

Output power: 3.8KW(with 100w input )

Plate voltage:3300v

  Plate current:1.8A

screen voltage:360v

screen current: 20mA

Bias:-71v

Grid current: 1 mA

Idle current:400ma

 Input 50 ohm SWR ≤ 1.2

                Heater and High Voltage both "soft" start

                control and screen grids are overcurrent protected
       Blower delay timer: Blowers run after PA is off for better                                                         cooldown