Started Feb 14, 2015
Started this discussion. Last reply by Chuck aa0hw Sep 25, 2017.
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one of the challenges when using a speaker for "copy by ear" listening to QRQ CW audio tones, is that the pure sine cw audio tones bounce off the walls, floor and ceiling of the room you are in and can cause all kinds of weird effects...this experimental combo of using a surplus, 5 buck, 4 ohm, flat panel speaker and the CW AUDIO CANNON…Continue
Posted on March 9, 2019 at 7:02am — 1 Comment
this is a follow up video to the first two videos about using a PETERSON CHROMATIC TUNER 320 as a COMPUTER based CPO CODE PRACTICE OSCILLATOR that you can key, in with STRAIGHT KEY, IAMBIC PADDLES and a CW KEYBOARD
this video demos using an MFJ 451 CW KEYBOARD for QRQ CW sending using the same setup - a PETERSON CHROMATIC TUNER 320 and a…Continue
Posted on February 8, 2019 at 2:10pm
this video demo's using an old 1 CPU laptop as an AFCW mode, QRQ CW KEYBOARD KEYER for an ELECRAFT K3S by using the K3S USB SOUND CARD and AFCW MODE, for keying QRQ CW with the AD5DZ software CW KEYBOARD into the K3S USB SOUND CARD's LINE INPUT...the K3S VOICE VOX CIRCUIT menu setting is "ON"
the old laptop is using the latest release of…Continue
Posted on January 3, 2019 at 12:57pm
LIVE DEMO of remote rig operations for CW using a software CW KEYBOARD, PADDLES and a STRAIGHT KEY at the remote site, as well as VOICE from the REMOTE LOCATION....
The ELECRAFT K3S has its own USB SOUND CARD, it will be used for AUDIO OVER IP and SERIAL COMMANDS over IP
to send and receive audio between the RIG and the REMOTE…
Posted on December 27, 2018 at 12:00pm
Even at 8.3 ms RISE and FALL time, as was used in this test setup, which is even more than the usual COMMERCIAL RIG's RAISED COSINE WAVE SHAPE, the amount of CW EDGE NOISE harmonic energy that you will still transmit above and below the actual CW PITCH, when sending at QRQ CW - say at 90 wpm, is shown here in this Spectrum Analyzer view below:…Continue
Posted on December 23, 2018 at 8:30am