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DC9DZ: Project Katana 20K – Power Amplifier (PA) using 4CX10000D

Data of DRESSLER Katana-20K RF Linear Amplifier

Frequency bands all HF amateur bands 1.8 MHz to 29.7 MHz
Power supply 2 power supply transformers 12400 VA & 3 VA
Plate voltage 7700 V at full output power
Screen voltage 1200 V stabilized
Grid voltage - 340 V +/- 30 V regulated
Filament 7.5 V / 75 A
Input SWR 160
30
20
17
12
10
m – 40 m
m
m
m – 15 m
m
m
< 1.2 : 1
< 1.3 : 1
< 1.5 : 1
< 2.0 : 1*
< 2.5 : 1*
< 3.5 : 1* @ 28.5 MHz
* with internal Tuner from TX or with additional Automatic Tuner SWR 17 m - 10 m: 1 : 1
Gain (1.8 – 29.7 MHz) 20 dB
Amplification Input power Output power  
Measured with a Bird Power Meter, 471200. 10 W
20 W
40 W
60 W
80 W
100 W
120 W
140 W
160 W
180 W
200 W
  1.0 KW
2.0 KW
4.0 KW
6.0 KW
8.0 KW
10.0 KW
12.0 KW
14.0 KW
16.0 KW
18.0 KW
20.0 KW
 
Input SSB Signal 10% of full 1.5 KHz Modulation
on / off Ratio 1:9, Interruptions: 30 Hz
Output limited by Software RTTY / CW / SSB:   7 KW / 13 KW / 25 KW
Harmonic Output 50 dB below rated output
IMD 32 dB or better
Tube Eimac 4CX10000D
Input network Reactance Compensation & Neutralization for each Band
Output network Switched inductor 18 uH, Caps: 150 pF var. / 9.0 KV + 330 / 150 pF fixed + 1000pF var. / 3.5 KV + 680 pF fixed
Computer control 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, Electronic plate current fuse, Supply voltages
Line Support One phase 230 V: 20 KW SSB: 32 A / 13 KW CW: 50 A / 7 KW RTTY: 50 A
Housing High quality black eloxial aluminia
Dimension 548w x 310h x 512d mm³
Weight 89 kg
Price 15980 €
optional SSB Tuning Aid 120 €
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