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Instruction Manual
Solid-State HF/50MHz Band
45W Linear Power Amplifier
Model HL-45B
TOKYO HY-POWER LABS., INC.
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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, ②BAND. 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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( 2 ) SPECIFICATIONS
Frequency : HF Band (1.8 ~ 28MHz and 50MHz Amateur Bands)
Mode : SSB(A3E), CW(A1A), FM(F3E)
RF Output Power : SSB (PEP)/CW 45W (Typical maximum output)
RF Drive Power : 5W max.
Duty Cycle 3 minutes (Continuous carrier transmission)
DC Power : DC 13.8V, 8.5A max.
In/Out Impedance :
50Ω
In/Out Connectors : SO-239
Major Ci rcui ts and Functions
:
① Class AB wide band linear power amp
② Automatic/manual switching output low pass filters
③ WARNG
(Protection circuit for over-voltage and over-drive)
④ LED meter for indicating transmitting power level
⑤ Send-receive switching remote terminal
⑥ ALC
Final RF Power Transistor
: RD30HVF (by Mitsubishi Electric) x 2
Accessory Parts : DC Power cord (Red/Black) x 1
Coax jumper cable with PL-259 connectors x 1
Remote control cable for FT-817 x 1
Spare fuse 10A x 2
Dimensions : 150(W) x 47(H) x 211(D) mm (5.9 x 1.9 x 8.3 inches)
Weight : Approx. 1.6kgs. (3.4lbs.)
Optional Parts : Remote control cable with 45B mini DIN/RCA phono
jacks (for non FT-8 17 radios)
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( 3 ) FRONT and REAR PANELS
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① POWER :
ON/OFF switch for DC power.
When it is first pushed, the switch is locked to turn DC power “ON”.
If it is pushed again, the lock will be reset to turn DC power “OFF”.
② BAND (Manual Band Select Switch) :
As you press this button, BAND will be shifted to upper band.
( 1.8/1.9 → 3.5/3.8 → 7 → 10/14 → 18/21 → 24/28 → 50 )
(This operation is only required for other than YAESU FT-817 radios.)
③ WARNG (Protection):
When the protection circuit works, WARNG LED lamp will light to shut down
the amp.
There are built-in protection circuits for RF over-drive and DC over-voltage.
To reset, after checking the causes of troubles, push the ①POWER switch
again.
④ BAND (Indicator LED) :
As the desired band is selected, the LED lamp indicates the current band in
operation.
⑤ POWER LEVEL :
Five LEDs indicate the relative transmitting power level.