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Tokyo Hy-Power HL-550FX User Manual

Solid-state hf/50mhz band 550w linear power amplifier
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Users Manual
Solid-State HF/50MHz Band
550W Linear Power Amplifier
Model HL-550
FX

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Summary of Contents for Tokyo Hy-Power HL-550FX

  • Page 1 Users Manual Solid-State HF/50MHz Band 550W Linear Power Amplifier Model HL-550...
  • Page 2 Introduction Thank you for purchasing the HL-550 This compact and lightweight desktop HF linear power amplifier has a maximum input power of 1.2kW. Our solid-state broadband power amp technology makes it the smallest and lightest in the industry in its class. Typical output power is 550W (SSB, CW) with the drive power of 65-90W.
  • Page 3 The amplifier has fast acting sophisticated protection circuits. Please note, however, any such actions that cause the same fault to occur repeatedly, will lead to failure of the valuable final power FET transistors. Before checking inside the amplifier, be sure to wait a few minutes for the high DC voltage to discharge (monitor Vd meter reading).
  • Page 4 Features Our solid-state broadband design engineers worked to make the HL-550FX, the lightest and most compact 550W out portable HF/50MHz amplifier in the industry. This world-class compact 550W HF amplifier is the easiest to handle and operate anywhere in the world.

  • Page 5: Specifications

    Specifications Frequency Band 1.8~50 MHz all amateur bands including WARC bands Mode SSB, CW (RTTY) RF Drive 65~90W typ. (100W max.) Output Power 550W typ. (RTTY 400W max.) Drain Voltage Drain Current 30A max. 50Ω (unbalanced) Input Impedance Output Impedance 50Ω...
  • Page 6 Otherwise, over-current protection completely shuts down the drain voltage power supply for five minutes before it gets resettable. When this protection works, O.DRIVE lamp lights and HL-550FX will enter the through state, the reset of the amp being disabled for five minutes.
  • Page 7 6-A. Front Panel Description 1 1 1 1 4 4 4 4 1 1 1 1 3 3 3 3 1 1 1 1 2 2 2 2 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 T T T T O O O O K K K K Y Y Y Y O O O O H H H H Y Y Y Y - - - - P P P P O O O O W W W W E E E E R R R R S S S S O O O O L L L L I I I I D D D D S S S S T T T T A A A A T T T T E E E E L L L L I I I I N N N N E E E E A A A A R R R R A A A A M M M M P P P P L L L L I I I I F F F F I I I I E E E E R R R R I I I I D D D D...
  • Page 8 ⑨ ⑨ ⑨ ⑨ O.HEAT O.HEAT O.HEAT (LED) O.HEAT (LED) (LED) (LED) : When the PA module temperature reaches 80 deg.C, the LED lights to indicate the protection circuit has worked. (It is necessary for the cooling fan to operate for several minutes to cool the PA module.) (Turn the main POWER switch to off, and then on again to reset the Protection Circuits.) (Turn the main POWER switch to off, and then on again to reset the Protection Circuits.) (Turn the main POWER switch to off, and then on again to reset the Protection Circuits.)
  • Page 9 6-B. Rear Panel Description F F F F U U U U S S S S E E E E I I I I N N N N P P P P U U U U T T T T A A A A N N N N T T T T A A A A C C C C A A A A L L L L C C C C A A A A D D D D J J J J...
  • Page 10 Inner Layout of Inner Layout of Inner Layout of Inner Layout of HL HL- - - - 550 550FX Upper View Upper View Upper View Upper View ① RF Power Detector and Send-Receive Switching Relay ② Inter-lock Switch ③ LPF Board ④...
  • Page 11 7. Connection and Operation This section explains a one-antenna system connected to the transceiver and an external SWR/POWER meter. K K K K F F F F X X X X K K K K F F F F X X X X R R R R E E E E A A A A R R R R R R R R E E E E A A A A R R R R S S S S I I I I D D D D E E E E...
  • Page 12 antenna has to be adjusted for lower SWR. As an alternative, an antenna tuner may be inserted. Turn the POWER switch on. Turn the BAND switch to a desired operating frequency band. Turn the STAND-BY switch to OPER (operate) position and the amplifier is ready to go.
  • Page 13 ALC Connection ALC voltage is available at the terminal marked ALC (RCA phono jack) on the right lower corner of the rear panel. Negative maximum DC voltage of ten volts (-10V) is produced at this terminal when the amplifier is fully driven. This voltage is adjustable with the ALC ADJ.
  • Page 14 Protection Circuits There are five major protection functions in this amplifier. If the amplifier has shut down for some reason, before re-setting, correct the possible cause of the shut down. Turn off the POWER once and back on to reset. O.
  • Page 15 10. Explanation of Major Circuits Four major circuit blocks are explained in their basic form and using signal flows. 10-1 Main DC Power Supply 10-2 Power Amp/ L.P.F. 10-3 RF Power Detector/ TX-RX Switching 10-4 Control Board 10-1 Main DC Power Supply The main DC power supply feeds the 42V DC power to the final PA stage.
  • Page 16 10-4 Control Board (PC1818) This is the heart of the control signal processing for the HL-550FX. It judges the operating condition of the amplifier, as well as issuing the commands to the peripheral circuits. Various analog signals are processed such as RF drive from the transceiver, RF power signals at various points, DC power supply information, etc.

  • Page 17: Troubleshooting

    11. Trouble Shooting Failure Possible Cause Solution AC mains not ① AC fuses blown ① Replace with new ones. operating ② AC cord not plugged in ② Plug in securely. ③ Interlock switch lifting ④ Wrong tap used on ③ Screw bolts tightly on the top cover. power transformer primary ④...
  • Page 18 12. Parts Layout 12-1 Top View (Detailed) 12-2 Top View & Side View 12-3 PA Unit (PC1662V) 12-4 LPF Unit (PC1817), Sub AC Unit (PC1819) 12-5 Frequency Detector Unit (PCS1733), RF Power Detector Unit (PC1821) 12-6 Control Unit (PC1818) 13. Schematic Diagrams 13-1 PC1662V PA (Power Amplifier) Unit 13-2...