RM ITALY LA435 Wideband UHF Amplifier Instructions

: June 12, 2024
: RM ITALY

Table of Contents

RM ITALY LA435 Wideband UHF Amplifier
Product Information
Product Usage Instructions:
INSTALLATION
GRAPH
Specifications
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

RM ITALY LA435 Wideband UHF Amplifier

RM-ITALY-LA435-Wideband-UHF-Amplifier-PRO

Product Information

The LA435 Wideband UHF Amplifier is a compact amplifier designed for the UHF band, specifically covering a frequency range of 405 to 480 MHz. It is suitable for enhancing the signal strength and amplifying the power of UHF signals.

The amplifier is compatible with the RTX system and can be connected to an antenna for optimal performance. It operates on a power supply of 12-14Vdc and has a maximum input current of 15A. The LA435 has a maximum input power of 1-5W and can provide an output power of up to 70W, making it ideal for boosting UHF signals.

For more information and support, please visit the website www.rmitaly.com or contact info@rmitaly.com.

Product Usage Instructions:

Connect the LA435 Wideband UHF Amplifier to a compatible RTX system.
Ensure that the power supply is within the range of 12-14Vdc.
Connect the antenna to the ANT port on the amplifier.
Make sure the input power does not exceed 5W to prevent damage to the amplifier.
Connect the battery or PSU to the appropriate terminals, following the polarity indications (red for + and black for-).
Power on the amplifier and adjust the settings as desired.

Note: Always refer to the user manual for detailed instructions and safety precautions before operating the LA435 Wideband UHF Amplifier.

INSTALLATION

The LA435 is a wideband compact amplifier for the UHF band; covering from 405 to 480 MHz. Output is nominal 60W at full power (70W max). RM-ITALY-LA435
-Wideband-UHF-Amplifier-2

Input drive from 1W to maximum of 5W, ideally suited to low power handheld transceivers.
Output power depends both on input power and frequency of use.
The graph illustrates the relationship between the two parameters.
The amplifier features automatic RF switching between RX and TX.
The diagram below illustrates the connection details.
The power cable for the amplifier should be kept as short as practicably possible and less than 3m in length.
When used in a mobile installation it is recommended that the power cable is connected directly to the auto battery.
A safety fuse may be added at this position for protection against short circuit.
12 to 15A is sufficient as the amplifier is internally fused.
The RF cable from the transceiver to the amplifier and amplifier to the antenna must be kept as short as practicably possible and be 50 Ohms impedance and suitable for the frequency of operation.
The antenna must also be suitable for the frequency of operation.
The amplifier must be installed in a suitable location that provides adequate ventilation to maximise cooling.
As the amplifier is compact it must be appreciated that adequate time is allowed for the amplifier to cool down between transmissions especially if used at maximum power.
As ambient temperature, installation location and ventilation are all factors that change for each installation the user must take this into account.
The amplifier may be left in circuit when switched off and the RTX may be used normally at low power.
SSB/FM. This switch when set to SSB adds a small delay before switching back to RX after a transmission.
When using SSB this helps prevent the amplifiers RX TX relay from constantly switching between RX and TX during pauses in speech as there is no RF carrier to hold the relay open.
In FM/AM modes this is not necessary and the switch position can be set to FM.