Tokyo Hy-Power HL-450B Instruction Manual page 5

Solid state hf band 400w linear amplifier

4. Explanations of Front and Rear Panels

‡@ POWER (Power Switch)

This switch turns the power on and off. When OFF, the linear amplifier enters the

through state.

(At the through state, the output power of the radio passes through the amplifier and is

supplied to the antenna directly. In addition, the received signal from the antenna is fed

to the radio directly.)

‡A AUTO/MANU (Auto/Manual Band Switch)

The band switching modes between auto and manual can be selected by pushing the

button. When the LED lights, auto band switch is selected. Otherwise, manual mode has

been selected. The band is shifted upward every time the button is pressed.

‡B PROT (Protection)

When an abnormality such as over-drive, internal over-temperature, DC over-voltage, or

high antenna SWR occurs, the protection circuit shuts down the amplifier to enter the

through state. And "PROT" LED lights.

When the cause of the shut down is corrected, turn the POWER switch off and on to

reset the amplifier.

‡C ON AIR

This lights when the HL-450B enters the transmission state.

‡D Meter

This displays the output power.

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