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( 1 ) FEATURES
HL-45B is a solid-state HF/50MHz band linear power amplifier with the
maximum output power of 45W. Designed RF drive power is 5W.
This amplifier is particularly designed for the use with popular portable radio
of YAESU FT-817. When combined with FT-817, you can enjoy a unique and
very comfortable feature of automatic band selection as well as send-receive
switching, by connecting the amp and radio with the supplied special control
cable. (When combined with other transceivers, the band selection can only be
made manually. See page 3, $aBAND. Also prepare an optional control cable
for your radio. Some modification may be necessary to meet the sockets of your
radio.)
A pair of RF MOS FET power transistors (RD30HVF1) are used in a broad
band push-pull form gaining high reliability and stability.
Over-voltage and over-drive protection circuits are provided. Also when the
amp is driven by signal frequencies between 26.000 and 28.000 MHz (11 meter
band), amp is shut down to comply with FCC rule, Part 97.
LED power level meter will always indicate the relative output power level for
the convenience of the operator.
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