Helium Amplifier UPUTRONICS Filtered Preamp _ HELIUM ADDICT

Описание: THIS information is copied from the original website of UPUTRONICS

NOT SUITABLE FOR HELIUM CRYPTO MINING (No TX Bypass). WE HAVE A TX BYPASS UNIT COMING EARLY JUNE 2022

Uputronics filtered preamps for improved 868MHz Reception for FLARM/LoRa/ISM


HELIUM USERS READ THIS: This unit doesn't bypass on transmit and is only suitable for boosting reception range. If you transmit through this device you'll damage it and we won't cover this under warranty.

This is a cost effective SAW based unit which give excellent performance gains.


All our preamps are compatible with most USB SDR Dongles such as the RTL USB, Airspy, Fun Cube. You can power them from either bias tee (This item is 100% compatible with the Airspy bias-tee) or a simple USB minicable (Not Supplied - See related items for a suitable USB Type A to Mini B Cable to power the unit.). A regulator is fitted as standard which means the bias-tee voltage input range is 5V to 26V. USB input is 5V.

This unit is a small filter and preamp designed to go between a software defined radio receiver and an antenna. Using a SAW bandpass filter and a low noise amplifier (LNA), it stops out of band intermodulation while providing additional gain for increased sensitivity. The LNA is before the SAW filter. This particular model is tuned for use with frequencies (868MHz).


The LNA used is a MiniCircuits PSA4-5043+ which provides at least 16dB of gain @ 868MHz. To stop out of band intermodulation an 868MHz SAW bandpass filter, which has a 15MHz bandwidth is also present. The insertion loss of this filter is approximately 2.3dB, which does increase the overall noise figure of the unit to 0.75dB. Connectors are SMA female both sides.

This unit does not have a transmit bypass and is for reception work only. Transmitting via this unit won't work and may damage it.

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copy me on your own risk .
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