Improving reception in CW was always a top priority of mine, contest or dx cq.

Having purchased a powerfull Sota Beam Vari audio DSP for an older project, I though why not buying another one and create a true spatial diversity headphones? While is just an ideea and was not tested yet, I cannot tell if this project could be any good or not. Ideea behind is such:

  • audio signal from  TCVR is sent to both DSP’s
  • Each DSP is driving half of headphones set
  • Left    DSP is set on 200 Hz bandwidth and centered on 400 Hz
  • Right DSP is set on 200 Hz bandwidth and centered on 500 Hz

So, cw signals in 400 – 500 Hz pitch range will be heard by both ears (Centered )  .

Signals within 300-400 Hz will be heard by left ear, and signals within 500-600 Hz will be heard by right ear.

In this way , our brain will truly distinct and separate signals depending by the pitch tone without purchasing expensive Heil headphones. A separate input level trimpot is required to balance signals depending of ears health.

Of course, this DSP having rotary encoder to set center and BW, each one can tune it where the pitch sound is better

Once this project will be done, I will post here the results and stereo audio recordings.

Cheers all, Gabriel


8 September 2020, Status Update

I have ordered the second DSP from SotaBeams, waiting for it to arrive.In the mean time I am looking in my junk box for audio amplifier and other components.


25 October 2020 ,update

Changed my mind so I did order a complete set from Sotabeams UK, the mighty Wolfwave dsp sound processor.

Got all the goodies like binaural, noise filter and 50 hz bandpass filter.It is a good product but probably I should’ve invest all equivalent money in more crystals for antenna narrow bandpass filter.Don’ let me be the judge for this product, it is absolutely incredible piece of art but apart of binaural mode i cannot find another use since ic7300 already got most of it’s features.

Anyway , binaural mode changed my audio perspective but be warned, it takes time to get used with it as big pileup made my head hurts but passed away within 30 minutes.Wonderful piece of art !!


  1. Buna Gabriel ,

    Te-am auzit in aceasta dimineata in 40m si ti-am vizitat pagina .
    Foarte multe lucruri interesante pentru un novice ca mine .

    Felicitari si ..hpe cu (on cw)…daca o sa ai rabdare …hi

    73 , Lucian YO2ARM

    1. Salut Lucian.
      Testam noua mea antena cu 3 elementi inverted vee in 7mhz pentru concursul CQWW de anul acesta.
      Din pacate “shackul” meu de la tara este la 50 Km de Bacau asa ca nu ma pot deplasa zilnic,
      mai mult in concursuri.Poate dupa ce voi finaliza monitorizarea de temperatura si energie voi lucra remote,
      insa nu pot neglija casa si serviciul in favoarea hobby-ului.
      Cu siguranta ne vom auzi si lucra CW.
      73 si succes !
      Gabriel yo8rxp

Leave a Reply

Your email address will not be published. Required fields are marked *

The reCAPTCHA verification period has expired. Please reload the page.