Introduction; Cautions - Tokyo Hy-Power HL-1.5KFX User Manual

1. Introduction

Thank you for purchasing the HL-1.5KFX. This compact and lightweight desktop HF/50MHz linear power
amplifier has a maximum input power of 1.75kW. Our solid-state broadband power amp technology
makes it the smallest and lightest in the industry.
Typical output power is 1kW PEP/SSB on HF and 650W on 6m band with the drive power of 85-90W.
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 (ICOM, Yaesu), and
RS-232C (Kenwood). See the Appendix page 26 for the list of the recommended radios.
All the data cables are included in your amplifier for your convenience.

2. Cautions

2-1
Unpacking the amplifier, check the fan guard (net) at the rear panel to see if there is any damage
caused by the physical shock during the transportation.
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 T
urn 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.
2-7
The amplifier has fast acting sophisticated protection circuits controlled by the latest microprocessor
technology. 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. Also note that the full power CW ( or carrier )
drive under the erroneous MANUAL BAND SET leads to the failure of the final power FET's. ( See
Section 6, at page 11. ) In this sense, it is highly recommended that the amplifier is connected to the
1