RM Italy BLA 300 User Manual

Amplificatore Lineare HF
HF Linear Amplifier
BLA 300
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[ Potenziometro regolazione sintonia preamplificatore - Preamplifier tuning
adjustment
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\ Interruttore accensione preamplificatore d' antenna - Antenna preamplifier switch
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] Interruttore inserimento ritardo SSB - SSB delay switch
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^ Interruttore accensione lineare - Linear amplifier switch
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_ Interruttore inserimento attenuatore d'ingresso -Input attenuator switch
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` Commutatore per la selezione del filtro passa-basso adeguato alla frequenza in uso.
Commutator to select the low-pass filter adapted to the working frequency.
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a Led indicatore d'accensione preamplificatore - Preamplifier switching ON led
indicator
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b Led indicatore di trasmissione - Transmission led indicator
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c Led indicatore d'accensione lineare - Amplifier switching ON led indicator
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d Indicatore di stato di protezione (rosso) o attenuatore d'ingresso inserito (verde) -
Protection state indicator (Red) or Input attenuator switch-ON (green)
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e Strumento indicatore della potenza d'uscita - Output power wattmeter
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f Interruttore generale di rete - Network switch
www.rmitaly.com rm@rmitaly.com
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Main board
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RM Italy BLA 300 Specifications

General

Brand	RM Italy
Model	BLA 300
Category	Amplifier
Language	English

Summary

Description

Low-Pass Filters

Six filters with cut-off frequencies to eliminate harmonic emissions.

Thermal Sensor Protection

Stops operation if the temperature becomes excessive, with automatic reset.

ROS Protection Circuit

Protects against high SWR or incorrect low-pass filter settings.

Input Power Protection

Protects the amplifier from damage due to excessive input power.

Usage

Input Attenuator Control

Controls input signal level and indicates green LED when active.

SSB Delay Switch

Inserts a 1-1.5 sec delay for antenna relay release in SSB CW.

Low-Pass Filter Selection

Selects the low-pass filter based on the transmission frequency.

Preamplifier Tuning

Tunes the antenna preamplifier for maximum signal intelligibility.

Protection Indicator

Red LED indicates danger, e.g., filter mismatch or high SWR.

ALC Calibration

Calibrates input power for optimal ALC connection.

Installation

Connections

Connects transmitter, antenna, power supply, and ALC/PTT.

Ventilation and Placement

Ensures good airflow around the unit for proper ventilation.

Description (GB)

Low-Pass Filters

Set of six filters to eliminate harmonic emissions.

Thermal Sensor

Stops operation if temperature increases, resets automatically.

ROS Protection

Stops amplifier if stationary waves (ROS) in antenna are too high.

Input Power Protection

Protects from damages if input power exceeds 12-13 W.