AlasKit resonant loudspeaker now available

Discussion in 'Ham Made Gear' started by KL7AJ, May 16, 2017.

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  1. K5WG

    K5WG Platinum Subscriber Platinum Subscriber QRZ Page

    Glad you're making them, Eric. How do I order the tunable version?
  2. KL7AJ

    KL7AJ Ham Member QRZ Page

    Hi William.
    I'll get back to you once we have a version that's easily reproducible. Still in the R&D phase.
  3. VK3YE

    VK3YE Ham Member QRZ Page

    I can't vouch for the particular product but I can say that the principle of a resonant speaker is great.

    If you haven't heard one in operation here's a video of a (crude and unoptimised) one I made

    Really brings out the signal. It's fiddly to operate as the speaker has to be a held a critical distance from the glass, but no doubt this item sorts this out.
  4. KB4MNG

    KB4MNG Ham Member QRZ Page

    how this going, speaker available?
  5. K8ERV

    K8ERV Ham Member QRZ Page

    Yes, what subject do you want me to speak on:? I am an expert on everything---

    TOM K8ERV Montrose Colo
  6. KB4DX

    KB4DX Ham Member QRZ Page

    +1 for what WR2E asked. I like hearing CW tones around 700 hz, but I like this concept!
  7. KG7FIU

    KG7FIU Ham Member QRZ Page

    OK, I don't know anything about the resonant speaker technology--but why not just build a simple 1- or 2-band parametric EQ circuit and be done with it? Seems like that would give you adequate tonal control and you could tune the freq too.
    Hasn't this all been done before?
  8. W7UUU

    W7UUU QRZ Lifetime Member #133 Volunteer Moderator Life Member Platinum Subscriber QRZ Page

    Autek QF1A into practically any decent speaker = solved! Any resonant frequency you want in the CW audio bandwidth is yours.

    Been using them for decades. Currently own three that are in regular use on various rigs.

    Nothing against specially resonant speaker cavities - but sometimes you want to change the Q and the center frequency, in an analog way not via DSP. That's where the QF1A just rules the roost.

  9. KW1L

    KW1L Ham Member QRZ Page

  10. KB4MNG

    KB4MNG Ham Member QRZ Page

    How much is the speaker?

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