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1.
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.
It is best suited for the DX-pedition use due to its light and compact design.
2.
Cautions
2-1
The amplifier is cooled by forced airflow. Several inches of clearance on the top
and the rear wall are necessary to allow for smooth air intake into the fan. Do not
block the air vents on the top cover.
2-2
Keep the amplifier out of direct sunlight, in a cool dry environment.
2-3
Internal high voltages (AC, DC and RF), are present at all times, ON AIR or OFF.
Internal access should be limited to avoid injury.
2-4
Turn off the AC main power immediately upon any unusual sounds, sights, or
odors. Check the multimeter readings of Vd and Id, the fuses and all cable
connections around the amplifier. Please notify the dealer or the factory of any
problems.
2-5
For your safety, do not operate the amplifier without adequate grounding. A
proper ground connection will result in peak performance and stability, in
addition to reduced RF strays or noises.
2-6
To eliminate the RF interference to such home appliances as TV, FM radio,
telephone sets, and etc., it is recommended that clamp-on ferrite cores be
inserted at both ends of the remote control cable, ALC cable, coaxial jumper cable,
and antenna cables, as needed. Also, a common mode AC line filter (near the AC
outlet), and in-line low pass filters on the antenna coaxial cable (as necessary),
are recommended.
.
FX
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