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3.
Features
3-1
Our solid-state broadband design engineers worked to make the HL-550FX, the
lightest and most compact 550W out portable HF/50MHz amplifier in the
industry. This world-class compact 550W HF amplifier is the easiest to handle
and operate anywhere in the world.
3-2
The amplifier's main PA section includes 4 high power MOS FET VRF150,
resulting in 550W (SSB/CW max.) on HF and 50MHz bands. The amplifier's
broadband characteristics require no further tuning once the operating band is
selected.
3-3
The amplifier allows operation in full break-in CW mode due to the use of the
amplifier's high-speed antenna relays (made by Panasonic).
3-4
With the unique duct structure design and the powerful blower fan, the
aluminum heat sink block for RF PA module (and other components), are
effectively cooled. The fan's quiet operation allows for even the weakest DX
signals to be heard.
3-5
The amp utilizes a sophisticated circuit to run the various high speed protection
circuits such as overdrive, high antenna SWR, DC overvoltage, band miss-set etc.
3-6
This amplifier is compatible with wide AC line voltage ranging from AC 100V to
260V. Although AC line voltage is automatically selected, be sure to install proper
fuse into AC line fuse holder.
3-7
For the safety of the operator, an Interlock system is employed. The AC power is
shut down if the top cover is removed, and the automated safety interlock is
activated.
3-8
An analog multimeter allows the operator to monitor Pf (Forward output power),
Pr (Reflected power), Vd (Drain voltage of power FET), Id (Drain current) etc.
3
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