LNA4ALL SDR Preamp LNA BIAS-T for HackRF & AirSpy

LNA preamp with BIAS-T for HackRF Airspy SDRPlay

Preamplifier and LNA (low noise amplifier) specially adapted with BIAS-T for HackRF One, AirSpy, SDRPlay and RTL-SDR V3 usb stick.

It highly increases the reception performance (+ 11dB to + 23dB) and operates on frequencies from 28MHz to 2500MHz (2.5Ghz).

This version of LNA4ALL, modified by the original designer, allows to be powered directly via the SMA wiht BIAS-T + 3.3V power of HackRF One, Airspy, SDRPlay and RTL-SDR V3 USB stick.

Note: This version can only be powered by SMA, the power mode 6V/9V directly on the card is no longer possible with this modified model.

See also the LNA4HF version for shortwave and HF bands from 150kHz to 30Mhz.

Availability: Out of stock, available 5-7 days


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33,25 €

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LNA4ALL for HackRF & AirSpy

Power supply: Power through SMA of HackRF or Airspy
Consumption: 18mA
Frequency range: 28MHz - 2500MHz
Receive gain: 11 to 23dB (cf. diagram)
NF: 0.75dB @ 1GHz
Impedance: 50 ohms
Antenna Connector: SMA Female
Dimension: 25x25 mm


This preamplifier LNA is highly efficient and need to be use with caution, never use near strong signals (FM radio station amateur radio, walkie-talkie, etc.) under penalty of "grill" your device immediately SDR HackRF One or AirSpy!

How to protect the LNA from ESD?

The static discharge can damage the LNA if it is not protected and used properly.

1 - Never leave the LNA plugged permanently or placed permanently behind an antenna on the mast
2 - Disconnect the antenna and ensure proper grounding of the LNA and antenna, before reconnecting the antenna cable discharging static electricity
3 - It is also possible to add extra protection diode BAV99 welding (scratch first location) to the input of the antenna as shown in green on the following picture:

So if lightning the diode will be damaged but not the rest of the LNA card.

No LNA will be returned or exchanged due to misuse.


Reviews LNA preamp with BIAS-T for


Fonctionne très bien!

Ce préampli fonctionne très bien : il y a une réelle différence !
Pour le HackRF, l'activation logicielle (avec gqrx) est réalisée en ajoutant le paramètre "bias=1".

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LNA preamp with BIAS-T for HackRF Airspy SDRPlay

LNA preamp with BIAS-T for HackRF Airspy SDRPlay

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  • Rating: 5/5 based on 1 user ratings
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