Data of DRESSLER Joker RF Linear Amplifier
| Frequency bands | all HF amateur bands | 1.8 MHz to 29.7 MHz | ||
| Power supply | 2 power supply transformers | 1200 VA & 1.5 VA | ||
| Plate voltage | 1500 | V | at full output power | |
| Screen voltage | 320 | V | stabilized | |
| Grid voltage | - 48 | V +/- 10 V | regulated | |
| Filament | 26 | V / 3.8 A | ||
| Input SWR | 160 | m – 10 m | < 1.25 : 1 | |
| Gain | (1.8 – 29.7 MHz) | 14 dB | ||
| Amplification | Input power | Output power | ||
| Measured with Array Solutions PowerMaster Accuracy: +/- 1.5% | 5 W 10 W 15 W 20 W 30 W 40 W 50 W |
130 W 260 W 390 W 520 W 780 W 1040 W 1300 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: 700 W / 1000 W / 1400 W | |||
| Harmonic Output | 50 dB below rated output | |||
| IMD | 32 dB or better | |||
| Tubes | Four GU-72 | |||
| Input network | 50 Ohm, 200 W HF Resistor, 5 pol. Chebychev Low Pass Filter |
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| Output network | Inductor: 18 uH, Caps: 250 pF var. + 330 pF fixed / 1000 pF var. + 1 nF fixed | |||
| Computer control | Plate current (every 5 msec), SWR, all switching functions, no relais switching under power conditions, soft start inrush, 30 sec delay time for full power, 2 speed 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, Reflected Power, SWR, Plate current, Plate voltage, Screen & Grid current / voltage |
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| Housing | High quality black eloxial aluminia | |||
| Dimension | 476w x 147h x 366d mm³ | |||
| Weight | 19 kg | |||
| Price | 1798 €, optional SSB Tuning Aid 120 € | |||
