RM Italy BLA703 User Manual

BLA703
HF 25—30 MHz Linear Amplifier
Specifications:
Operation Frequency: 25—30 MHz (10m Amateur HF Band)
Modulation Types: SSB,CW,AM, FM, data etc (All narrowband modes)
Transistor: 16x RM 3 MOSFET
Max I/P Current: 10A / 120V. 6A 230/240Vac
Power Supply: 110-120V or 230-240V Model specific
Input Fuse (Internal): 10A or 6A (5x20mm Fast)
Input RF Power: 1-30W max (All modes)
Output RF Power: 550W max
Maximum bypass power (Amplifier off): 50W max
Input VSWR: 1.1—1.5:1
Output VSWR Maximum: 2.5:1
Harmonic Output: >-50dBc 25-30MHz
Dimensions: 410mm x 175mm x 305mm
Weight: 13kg
WARNING: Before using this product please read carefully all of
the information in this manual or at least the quick start guide!!! To avoid dam-
age or incorrect operation this is extremely important!!!
Ver 1.1 Feb. 2024
2
Quick Start Guide:
A more complete guide to the installation is featured later
1. Connect the RTX input connector to transceiver with
50 Ohm patch cable.
2. Connect the ANT Output of the Amplifier to VSWR
Bridge / Wattmeter (If required), and then the ATU (If
required) then the Antenna (50 Ohm load Impedance).
3. Make sure that the amplifier AC switch is switched
off.
4. Connect the Amplifier AC power cable to the AC Net-
work. Pay attention that you have the correct BLA703
model for your countries AC voltage.
5. Adjust the Transceivers RF output power to 10 W
(30W max) if it is capable of more than 30W output
6. Switch on the Amplifier. After a short boot period
press the STB /OPR button until the LED turns green,
‘Operate mode’.
7. Try a brief transmission to check that the antenna
VSWR is acceptable with the amplifier in use. Any
large increase in VSWR indicates that the Antenna is
not suitable for the power being used. Operation
should be halted immediately to avoid damage to the
Amplifier / Radio / ATU etc.
8. If everything is OK you can increase the input drive
and / or change the output power level to suit your
output power requirements.

RM Italy BLA703 Specifications

General

Brand	RM Italy
Model	BLA703
Category	Amplifier
Language	English

Summary

Quick Start Guide

Installation and Initial Operation Steps

Step-by-step instructions for connecting the amplifier, setting controls, and performing initial tests.

Front and Rear Panel Description

Front Panel Controls and Indicators

Details of buttons, switches, LEDs, and indicators on the front panel of the amplifier.

Rear Panel Connections

Description of the input/output connectors and power input on the rear panel.

Installation and Operation

Installation Procedure

Guidelines for properly installing the amplifier, including ventilation and grounding.

Basic Operation

Initial steps and important considerations before powering on and operating the amplifier.

Antenna Considerations

Recommendations for antenna selection, matching, and VSWR for optimal performance.

Operating Modes and Features

Explanation of different transmission modes and the RX preamplifier function.

Transmit Time Warning

Important cautions regarding transmission duration and duty cycles to prevent overheating.

Power Management and Performance

Input Drive and Output Power

Guidance on input power levels required for full output and managing output power.

Maximum Output Power Considerations

Strategies for operating at maximum output power without distortion or damage.

Performance Monitoring and Error Handling

Typical Harmonic Output

Analysis of harmonic output levels to ensure signal purity.

Output Power Meter

Explanation of the output power LED display and its calibration.

VSWR Meter

Interpretation of the VSWR meter for antenna impedance matching.

Error List and Reset Procedures

Decoding alarm conditions and procedures to reset the amplifier.

Important Notices

Attention and Legal Responsibility

User responsibilities regarding legal use of linear amplifiers.

Product Warranty Information

Details of the product's warranty coverage and limitations.