Video Comparison of the Airspy HF+ and SDRplay RSP1A on the FM Broadcast Band

Frequent reviewer of SDR products Mile Kokotov has just uploaded on his YouTube channel a new video where he compares the Airspy HF+ against the SDRplay RSP1A on FM broadcast reception.

At first Mile compares the two against strong broadcast stations, and then later compares them on weak DX stations surrounded in amongst other strong stations. With the strong stations a difference between the two radios is impossible to detect. But with the weaker stations that are surrounded by strong signals the Airspy HF+ has the edge with it's higher dynamic range and sensitivity.

Mile writes:

In this video I am comparing two popular SDR-Receivers (Airspy HF+ and SDRplay RSP1A) on FM Broadcast Band.

I have made few recordings with every receiver with the same antenna trying to set the best SNR = signal-to-noise ratio.

My intention was to ensure the same conditions for both SDR`s in order to make as fair as possible comparison.

No DSP enhancing on the SDR`s was used.

Antenna was Vertical Dipole.

When receiving signals are strong enough, You should not expect the difference between most receivers to be very obvious!

If you compare one average transceiver (which cost about $ 1000 USD) and top class transceiver which cost ten times more, the difference in receiving average signals will be very small too. Almost negligible! But when you have difficult conditions, the very weak signal between many strong signals, than the better receiver will receive the weak signal readable enough, but cheaper receiver will not. Today it is not a problem to design and produce the sensitive receiver, but it is far more difficult to design and produce high dynamic receiver for reasonable price! The Airspy HF+ and RSP1A are very very good SDR-receivers. They have different customers target and have strong and weak sides. For examle Airspy HF+ has better dynamics in frequency range where it is designed for, but RSP1A, on the other hand, has broadband coverage...

Airspy HF+ vs SDRplay RSP1A Comparison on FM Broadcast Band


  1. Micked

    Might be because it’s optimsed for hf and vhf

    HF coverage between 9 kHz .. 31 MHz
    VHF coverage between 60 .. 260 MHz

    • Bendail Vam

      I thinking the same thing when I see this. Why? I spend great time and effort trying to block out the 100Kw 300m towers 10 km from me. I trhink I could recieve FM band on a pin attached to my teeth at this distance….um…thyank for the effort though?

      • Bendail Vam

        Frequency Modulation DX? That an inside joke, right? You have antenna and bearing more then receiver involved it that, but hey there are different shades of orange.

        • admin

          FM DX is of course just shortened from broadcast FM DX, as in referring to the broadcast FM stations between 88 – 108 MHz… BCFM DX is quite a challenge if you have strong stations nearby, and it can be fun to sort out those problems and receive a far away DX station. People also DX TV stations and other things on VHF too.

        • radisti

          – Many Sony XDR receivers (over 20) and many diiferent kind of SDR-receivers (Perseus FM+, Dientronik, AirSpy, SDR Play, RTL SDR-sticks)
          – Körner 15.11 horizontal yagi
          – Körner 15.11 vertical yagi
          – 2 x FM Preamp Type 1301 88-230 MHz (Research Communication Ltd / UK)
          – 6-element yago for OIRT (65-74 MHz)
          – 4-element yagi for 50-70 MHz

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