Tokyo Hy-Power HL-1.5KFX User Manual page 4

radio with supplied Band Data Cable.
2-8
Before checking inside the amplifier, be sure to wait a few minutes for the high DC voltage to
discharge (monitor Vd meter reading). The potentiometers for RF power detector, protection circuits,
FET bias voltage circuit, etc, are precisely adjusted at the factory, and should not be altered. Doing so,
would require readjustment with precision measuring instruments.
2-9
The primary power transformer is factory pre-wired for AC 230V operation. Sliding the select switch
located on the bottom of the chassis will switch the voltage from 230V to 115V. (See AC Power section.)
Be sure to verify switch selection before you plug the AC power cord into the outlet.
2-10
Before powering on the amplifier, be sure to connect a dummy load (50 ohms, 1kW min.) or a
well-adjusted antenna to the output terminal. Operating without any load will cause extreme stress to the
RF power FET's, although protection circuits should work under critical conditions.
2-11
Required drive power is slightly less than 100W to obtain the full 1kW output. Do not attempt to
operate with excessive drive from a high power transceiver. Transmitting high drive RF (over 100W) into
the amplifier will void the warranty.
2-12
Keep the aluminum heat sink and air openings free from dust and blockages. Periodic cleaning will
prevent degraded cooling efficiency.
2-13
For long continuous operation in RTTY modes, it is recommended you reduce the RF drive levels
by 20% to 30% lower output than CW/SSB modes. Optional Fan Kit recommended.
2-14
To prevent damage to the precision electronic components, avoid extreme physical shock to the
amplifier. If factory service is required, the amplifier MUST be shipped using the original box and
packaging materials.
2