Band Selector Switch - select the working "band" or AUT. ( auto select mode)
Band Select indicator , when switch is in AUT. shows the currently used Band.
Power Output wattmeter.
Protection indicator.
Amplifier power switch.
Power on indicator Led.
Input attenuator switch.
Attenuator switch indicator Led.
SSB/CW delay switch.
Transmit indicator Led.
Specifications:
Frequency : 1.8 - 30 MHz - (10 - 160 meter )
Input power : 1 - 10 W AM - FM
: 1 - 15 W SSB - CW
Output power : 150 W Max AM-FM
: 250 W Max SSB-CW
Input SWR : 1.1/1.5
Antenna SWR Max : 2.5
Mode : All Modes
Fuse : 2 x 12 A
Power Supply requirements
Voltage : 13 VDC ± 1 V
Current : 24 A. Max Input
DESCRIPTION
The HLA 150 Linear Amplifier will meet the need for increased operating power with low power QRP
radios like the YAESU FT817 and ICOM IC703, etc. It is designed keeping in mind the need for
attenuation of the unwanted harmonic signals in the outputs.
The amplifier works on Amateur -Radio HF BANDS, 160 to 10 meters, in all modes. It features six LOWPASS FILTERS with 3 - 4 - 5 - 8 - 15 -22 - 31 MHz cut off frequencies, to drastically reduce harmonic
output power.
Control of the filter selection can be either AUTOMATIC or MANUAL.
AUTOMATIC - (Aut. on switch 1), is controlled by means of a microprocessor that reads the transmission
frequency and automatically selects the correct filter.
MANUAL - the band is selected by the position of switch 1. If the microprocessor detects the incorrect
filter has been selected, it will be indicated by an audio signal.
The amplifier incorporates a circuit to protect against HIGH SWR that stops it from working when the
SWR on the antenna is too high. This same circuit protects the Power Amplifier from damages caused by
incorrect setting of low pass filters.
The HLA 150V model features two fans on the aluminum heat sink, to more efficiently dissipate the heat
so the amplifier can be used in high temperatures environments as well as with intensive uses (contest etc.).
The fans operate at variable speeds to decrease the noise during receiving, when their use is not so
necessary.
INSTALLATION
Unpack the Amplifier and check for damages caused during transportation. There are two SO239
connector on the rear of the Amplifier. Connect the SO239 connector labeled RTX to your transceiver with
a RG58 cable, about 3 feet (90 cm.) long. Connect the antenna to the SO239 connector labeled ANT. Next,
be sure that the power switch (5) is in the OFF position. Connect the power cables to the vehicles battery
for mobile operation or to a power supply capable of providing 13.5 Volt at least 25 Amp under continuous
use. (Red = Positive, Black = Negative)
The power cables wire size must be no less than 12 AWG (4 mm²) and the length should not be more than
3 meters. The supplied voltage must not exceed 15 Volt. The Amplifier should be places in a position that
permit easily access to the controls. Be sure to leaving enough room around the amplifier to ensure good
ventilation.
ATTENTION!
Before using this Amplifier, be sure the antenna and power supply meet the required specifications.
Remember that the laws of each country regulate the use of linear amplifiers. The manufacturer cannot be
responsible if the amplifier is not operated according to these rules.
Failure to follow the provided instructions will result in the warranty being canceled. External and
aesthetics parts as well the final transistors are not covered by the warranty.
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