Lana HF v2 - Ultra Low-Noise LF, MF & HF Amplifier (LNA) Module for RF & Software Defined Radio (SDR). Wideband 50kHz-150MHz Frequency Capability with Bias Tee & USB Power Options

This works great as a wide band amplifier for HF listening where the gain of the SDR is poor. It makes a bog difference.

Looking to build my own, the quality integrated circuits use for RF amplification are horrendously expensive. I checked out some YouTube videos showing the circuitry of this device and decided to give it a try.This is the HF model, it works much better than the three or four terminal chip ones costing $5-$6, and it has a much lower noise floor.I did build a high pass filter with a cutoff frequency around 2Mhz to use before the LNA to cut most of the industrial noise in my area. So I recommend including a similar filter if you decide to purchase this unit.Because of the high gain, I had to adjust the gain of my receiver (RSP1a), however I had heard of people to have good success using an attenuator between the LNA and receiver.Do I feel that it was a good purchase? Noisy atmospheric days not so much, Good listening days are great.Edit: Although the high pass filter worked to cut the machine motor noise in my area by blocking everything below 2 Mhz, I have incorporated another low pass filter that blocks everything above 40 Mhz, effectively making a band pass filter. I had not expected the outcome to be so impressive, but if you're having trouble with noise, this worked for me.

I have a shortwave radio and use this LNA between it and my wire antenna. It's nice that it can be powered via a USB plug since my radio doesn't have any way to power the device itself. An old phone charger or connecting it to my PC for power works just fine. I will be buying a rechargeable battery to power it for portable use very soon.My reception has been dramatically improved with this LNA and it doesn't raise the noise floor nearly as much as a cheap no-name LNA that I had been using did. I highly recommend this unit if you're looking for a quality LNA for HF. I have not tried it above 30 MHz so I can't speak for how well it works in the full frequency range that it claims to work for but for 30 MHz and below it works great.

This amp does nothing except attenuate the RF line and, there is no difference between it being powered or not (tried bias-tee, USB and a battery pack(3 AA batteries)), I get almost no signal through this amp. Again powering this amp does nothing, no noise floor change or anything.What is does:* High attenuation on all frequencies* Has a lightI cut the USB to barrel jack adapter it came with to hard wire it so I can not return it.... :(

I am really impressed with how well this LNA amplifies. It truly is low noise, and it gives me about 20dBm of gain from 10MHz to at least 200MHz, using a signal generator as a reference source. Sadly my spectrum analyzer does not go below 10MHz, otherwise I'd see how well this performs at lower frequencies, however I did some testing at higher frequencies. 500MHz is about 15dBm of gain, dropping down to about 11dBm of gain at 2GHz. As you can see, this amplifier clearly has no front end filtering, to limit this to just the HF and lower bands. Because of that, if you have a strong local RF source, you're probably going to need to use a filter before this LNA. When I first connected this LNA to my SDR, I couldn't really see any difference, so I delayed my review until I could get the equipment to do a proper test on this LNA. Now it appears that I'm going to need a low pass filter, for best performance in my location. BTW, dBm is what my gear uses, and is a standard measurement, and easily converted into other units, you may be more comfortable for you.

Connect this to a 9:1 balun and a long wire and be ready to be amazed. You need to place this at the antenna else you are also amplifying the noise on the line. Very happy. Going to make a specialized helical antenna for satellites. I am anxious.

Works well. Easy to interface.

The Pros vs Cons:Cons: This low noise amplifier has a major overloading problem that causes FM broadcast breakthroughs all over the shortwave band. Not supposed to be happening. Resilience if important when dealing with strong signal overloading. I think Nooelec should have gone the extra mile by integrating a FM/MW notch filter circuit.Pros: I can clearly see HF signals albeit weak on a 17 inch antenna I used for testing the LNA. Signals were received from 40m to all the way up through 150MHz. I didn't expect much from a 17 inch antenna but it showed the Lana HF's potential. It worked really well on the VHF aviation and 2m amateur bands.I only recommend it if you own an external MW/FM notch filter. It works well.