RM Italy KL405 User Manual

KL405
HF 10m Linear Amplifier
WARNING: Before using this product please read carefully
all of the information in this manual or at least the quick start guide!!! To
avoid damage or incorrect operation this is extremely important!!!
Specifications:
Operation Frequency: 10m Amateur Band, (1.8-30MHz with LPF)
Modulation Types: SSB,CW,AM, FM, (All narrowband modes)
Transistor: 2x RM SD1446 Transistor
Max I/P Current: 22A
Power Supply: 13.8VDC+/- 1V 30A
Input Fuse (Internal): 3x12A (5x20mm Fast Blow Glass Fuse)
Input RF Power: 1-10W max (All modes)
Output RF Power: 180W max
Maximum bypass power (Amplifier off): 50W max
Input VSWR: 1.1—1.5:1
Output VSWR Maximum: 2.5:1
Ver 1.0 Jul. 2020

RM Italy KL405 Specifications

General

Input power	1-10 W
Input power SSB	2-20 W
Output power	200 W max
Dimensions	200 x 200 x 60 mm
Weight	1.5 kg
Mode	AM, FM, SSB, CW

Summary

Specifications

General Safety Warnings

Important safety notice to read before using the product to avoid damage or incorrect operation.

Quick Start Guide

Front and Rear Panel Description

Front Panel Controls and Indicators

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

Rear Panel Connectivity

Description of the RF input, DC power input, and RF output connectors on the rear panel.

Installation and Setup

Mounting and Ventilation

Guidance on installing the amplifier in a location allowing good ventilation and support.

Power Supply Connection

Requirements for connecting the DC power supply, including voltage, current, and cable gauge.

Operating the Amplifier

Pre-Operation Checks

Ensuring correct setup and drive radio output adjustment before powering on the amplifier.

Transmission Indicators

Explanation of the amplifier's ON and TX LEDs during operation.

Antenna, Mode, and RX Preamp Operation

Antenna Compatibility and VSWR

Guidance on antenna requirements, impedance matching, and VSWR limits for safe operation.

Supported Transmission Modes

List of narrow band transmission modes supported by the KL405 amplifier.

RX Preamplifier Functionality

Explanation of the RX preamplifier's role in improving received signal levels.

Transmit Time Warnings

Cautionary advice on duty cycle modes and transmission time to prevent overheating.

Input Drive and Power Output Management

Optimizing Input Drive Power

Recommendations for achieving optimal output with appropriate input drive levels.

Maximum Output Power Considerations

Understanding gain compression and operating below saturation for cleaner output and longevity.

Broadband Frequency Use

Extended Band Operation

Information on using the amplifier on bands outside the primary 10m range.

Harmonic Suppression

Importance of external Low Pass Filters for operation on other HF bands.

Schematic Diagram

Legal and Warranty Information

Regulatory Compliance and User Responsibility

User responsibility for understanding and complying with local laws regarding linear amplifier use.

Product Warranty Details

Information on the 24-month warranty, coverage, and exclusions.