Started Feb 14, 2015
Started this discussion. Last reply by Chuck aa0hw Oct 1, 2020.
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this is a follow up from the first video here - https://youtu.be/pfWvh82Qh20
in this video....QRQ CW is being transmitted out on the ULF band at 797 hz and at 75 wpm to a small horizontal wire loop antenna @ about 30 watts from an audio amp/4 to 1…
ContinuePosted on January 5, 2021 at 12:00pm
go to keyer.elf.org
Posted on November 30, 2020 at 10:08am
wireless transmission from the CW KEYER - keying a 555 at 40 Khz - to a wireless LF RF BAND software receiver - demod'N the 40 Khz CW Keyer LF BAND transmitter's CW
the TX and RX antenna are using a high Q , series/parallel resonated FERRITE BOBBIN CORE INDUCTOR COIL - @2mH each - series and parallel resonating capacitors…
ContinuePosted on November 24, 2020 at 3:58pm — 1 Comment
22 individual CW software KEYBOARDs are sending a CW text file from 500 hertz up to 11Khz
separated individually by 500 hertz from one signal to another
to pick a CW SPEED/signal that you would like to copy by ear - use your SDR
- here is a quick example of doing that here with a…
ContinuePosted on November 20, 2020 at 3:19pm — 2 Comments
60 wpm test - classic R-C exponential envelope VS Raised Cosine - for copying by ear - which do you prefer ?
NOTE: to get the RAISED COSINE edges from YPlog, its RISE/FALL time was set to zero and sent through this simple Gstreamer CW AUDIO BANDPASS filter…
ContinuePosted on November 18, 2020 at 11:00am
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