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DC9DZ: Project Katana 8K – Power Amplifier (PA) using GU95b

Data of DRESSLER Katana-8K RF Linear Amplifier

Frequency bands all HF amateur bands 1.8 MHz to 29.7 MHz
Power supply 2 power supply transformers 7000 VA & 1.5 VA
Plate voltage 3450 V at full output power
Screen voltage 330 V stabilized
Grid voltage - 70 V +/- 10 V regulated
Filament 27 V / 8 A
Input SWR 160 m – 10 m < 1.15 : 1
Gain (1.8 – 29.7 MHz) 18.0 dB
Amplification Input power Output power  
Measured with a Bird Power Meter, Model 43, PEP 10 W
20 W
40 W
60 W
80 W
100 W
  800 W
1600 W
3200 W
4800 W
6400 W
8000 W
 
Input SSB Signal 20% of full 1.5 KHz Modulation
on / off Ratio 1:4, Interruptions: 30 Hz
Output limited by Software RTTY / CW / SSB:   2800 W / 4000 W / 8000 W
Harmonic Output 50 dB below rated output
IMD - 48 dB @ 6000 W SSB output (working with Class A)
Tube Svetlana GU-95b
Input network 50 Ohm, 200 W HF Resistor,
5 pol. Chebychev Low Pass Filter, switched
Output network Inductor: 19 uH, Caps: 250 pF var. + 390 pF fixed / 1000 pF var. + 330 nF fixed
Computer control Plate current (every 5 msec), SWR, all switching functions,
no relais switching under power conditions, soft start inrush, 300 sec delay time for full power, 2 speed turbine blower

Well regulated screen and grid supply for +ve and -ve currents as well as current limiting to protect the tube and minimize the IMD. It is impossible to override the screen and grid dissipation at any working conditions.
Metering Output, SWR, Plate current, Plate voltage,
Screen & Grid current / voltage
Housing High quality black eloxial aluminia
Dimension 490w x 159.5h x 512d mm³
Weight 48 kg
Price on request: DRESSLER only has one amplifier
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