User's Manual

1.Introduction
Thank you for purchasing the HL-2500FX. This compact and
lightweight desktop HF linear power amplifier has a maximum input
power of 2.9 kW. Our solid-state broadband power amp technology
makes it the smallest and lightest in the industry.
Typical output power is 1.5 kW PEP/SSB on HF (1kW on 50MHz)
with the drive power of 85-90 W. The built-in band decoder will let you
forget about the band setting when the amplifier is connected to your
modern radio through such band data cables as ICOM CI-V, DC
voltage (Yaesu and Elecraft K3), and RS-232C (Kenwood). These
data cables are optional parts. The one that matches your radio should
be purchased separately.
2. Cautions
2-1 Unpack the amplifier, check the fan guard at the rear panel fan to
see if there is any damage caused by the physical shock during the
transportation. Fan blades must be free to rotate when powered.
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, etc.,
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