[SFDXA] N4IS Carlos' Acoustic CW Speaker/Filter Demonstration - SFDXA Meeting Tonight

[Bill]

I hope everyone is able to see Carlos N4IS, presentation of an 
experimental acoustic CW Filter he calls the 3-S.....at the SFDXA 
Meeting tonight.

I have been fortunate to have been using a prototype for a couple of 
months now. It is not anything like any filter you've seen before 
visually or mechanically. Here is a note I sent to Carlos a short while 
ago regarding an experience I had using it.

"Carlos I just had to tell you...the TX9A today was just a bit too weak 
to copy on 24.894. But with the 3-S online I was able to hear my call 
and work him...then an hour later he's on 18074. Once again way too 
weak...I called him and he came back to someone... I just could not make 
out the letters let alone the callsign...*/then I turned the 3-S on, I 
tuned it, and I heard my call, it was me he was calling/*!...I quickly 
sent my report and got the "TU". So */in the log/* on both bands thanks 
to the 3-S."

I planned on being there tonight, but something unexpected came up 
yesterday last minute, and I cannot attend. I wanted to relay this quick 
story to attest to Carlo's remarkable years of research and findings.
*
/AGAIN: /*/*It is not anything like any filter you've seen before 
visually or mechanically.*/

Attend The Meeting or at least the ZOOM for this presentation

Bill W2CQ
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/sfdxa/attachments/20250507/bd91ae99/attachment.html>