Data of DRESSLER Katana-20K Ultra RF Linear Amplifier
| Frequency bands | all HF amateur bands | 1.8 MHz to 29.7 MHz | ||
| Power supply | 2 power supply transformers | 8260 VA & 1.5 VA | ||
| Plate voltage | 4880 | V | at full output power | |
| Screen voltage | 330 | V | stabilized | |
| Grid voltage | - 78 | V +/- 12 V | regulated | |
| Filament | 27 | V / 7.4 A | ||
| Input SWR | 160 15 10 |
m – 17 m m – 12 m m |
< 1.35 : 1 < 1.5 : 1 < 2 : 1 |
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| Gain | (1.8 – 29.7 MHz) | 21.5 dB | ||
| Amplification | Input power | Output power | ||
| Measured with a Bird Power Meter, Model 43, PEP on 7.1 MHz Input SWR 1.24 : 1. |
10 W 20 W 30 W 40 W 50 W 60 W 70 W 80 W 90 W 100 W 110 W 120 W 130 W 143 W |
1400 W 2800 W 4200 W 5600 W 7000 W 8400 W 9800 W 11200 W 12600 W 14000 W 15400 W 16800 W 18200 W 20000 W |
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| Input SSB Signal | 10% of full 1.5 KHz Modulation on / off Ratio 1:9, Interruptions: 30 Hz |
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| Output limited by Software | RTTY / CW / SSB: 5500 W / 11000 W / 20000 W | |||
| Harmonic Output | 50 dB below rated output | |||
| IMD | - 43 dB @ 25% power output - 37 dB @ 50% power output - 33 dB @ 100% power output |
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| Tube | Two Svetlana GU-78b | |||
| Input network | 50 Ohm, 200W HF Resistor 5 pol. Chebychev Low Pass Filter, switched |
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| Output network | Inductor 15 uH, Caps: 250 pF var. + 330 pF fixed / 1000pF var. + 1.5 nF fixed | |||
| Computer control | Plate current (every 5 msec), SWR, all switching functions, no relais switching under power conditions, soft start inrush, 240 sec delay time for full power, two 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. |
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| Metering | Output, SWR, Plate current, Plate voltage, Screen & Grid current / voltage | |||
| Housing | High quality black eloxial aluminia | |||
| Dimension | 656w x 159.5h x 580d mm³ | |||
| Weight | 85 kg | |||
| Price | 230 V line with CEE 1-32 (32 A): 15980 €optional SSB Tuning Aid 145 € | |||
