Discussion in 'Ham Made Gear' started by KL7AJ, May 16, 2017.
Glad you're making them, Eric. How do I order the tunable version?
I'll get back to you once we have a version that's easily reproducible. Still in the R&D phase.
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.
how this going, speaker available?
Yes, what subject do you want me to speak on:? I am an expert on everything---
TOM K8ERV Montrose Colo
+1 for what WR2E asked. I like hearing CW tones around 700 hz, but I like this concept!
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?
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.
Take a look at this review:
How much is the speaker?