All Blog Posts (419)

brief demo of what QRQ CW morse code audio tones sound like using the FLAC AUDIO CODEC on Gstreamer Pipelines

NOTE: the QRQ CW AUDIO you are hearing, if what the FLAC encoded CW AUDIO sounds like after decoding it finally on the LAPTOP(Lubuntu 18.04)

the QRQ CW AUDIO stream starts on the LAPTOP goes to the PI over wired Ethernet,…

test by sending a QRQ CW test file from TOM's W4BQF famous article:

https://sites.google.com/site/tomw4bqf/copyingcwover70wpm

software CW KEYBOARD by AD5DZ:

https://youtu.be/l8wKVnA4oGc

RASPBERY PI…

here is a brief VIDEO to demo the problem with the K3S transmit input monitor when operating AFCW transmit MODE

brief demo showing the ELECRAFT K3S transmitting QRQ CW in FULL QSK with RX AUDIO between LETTERS...AND while you are listening to the K3S input TRANSMIT audio monitor - it sounds like everything is ok and working well...even while…

     in HONOR of the late GREAT SK -   WILD BILL -   KB9XE   

demo of this - honoring the late great QRQcw OP

"WILD BILL", KB9XE

here are the Gstreamer scripts used for this example:

SEND a jpeg picture to…

Here is a video demo'N an experimental setup to key an ELECRAFT K3S at 75 wpm(FULL FAST QSK) so you are able to hear background HF RECEIVE audio between letters 

a test run using a setup using all LINUX FREE SOFTWARE to run REMOTE RIG OPERATIONS for QRQ CW at 75 wpm...trying to achieve good FULL QSK with RECEIVE HF AUDIO between letters at…

brief LIVE demo on 40 meters RX - of using the Noise-repellent LV2 PLUGIN to lower(or even virtually eliminate) the HF Background audio static while listening to a CW SIGNAL

(this plugin works well on VOICE too)

https://github.com/lucianodato/noise-repellent…

https://medium.com/@steve_peron/best-morse-code-cw-apps-for-ios-android-top-apps-c7cd445e73f5

This video is a short demo of a first test trying to broadcast 5 FLdigi's sending at 5 different qrq speeds...where you can choose which FLdigi//speed you want to listen to - right from your browser listening to the TWITCH QRQcw CHANNEL.

a test to transmit and receive 5 individual channels of audio to AND from the TWITCH Streaming server -…

iCW now has a new PRO MUMBLE SERVER dedicated for QSO'n QRQcw over the internet

It is located in Denver, Colorado

Please see this iCW website for more information: …

brief test creating 2 Gstreamer AUDIO PIPELINE LOOPBACKS from a Linux Laptop TO a RASPBERRY PI 2b - over the LAN - going through routers and switches...(both using Jack Audio Connection Kit)

one PIPELINE using rtpL16***

and the other PIPELINE using rtpL24***

to compare Gstreamer's rtpL16pay and rtpL24pay RTP AUDIO PAYLOADER…

After bringing together EhoCW, VoiceMeeter Banana and Mumble, I built an interface for my paddles using the following:

1 - Sewell USB-Serial Adapter (I had this on hand, a similar one is available on Amazon)

1 - 3.5mm Stereo Female Terminal Block panel mount connector…

TOM's article about his work with the DVORAK keyboard for QRQ CW TYPING

  https://www.eham.net/ehamforum/smf/index.php?topic=81139.10;wap2

HERE IS SOMEONE USING a DVORAK KEYBOARD to type 150 wpm…

this is an advanced setup for remote control of an ELECRAFT K3S over ip on the LOCAL AREA NETWORK - a LINUX LAPTOP to the Rig's Raspberry PI's computer

AUDIO OVER IP: over the local LAN with routers and switches :

zita-njbridge is used to provide audio for RECEIVE AND TRANSMIT…

short test by transmitting CW at 1 watt on 10 meters - going to a websdr rcvr to listen and record the sound - look for how well using AFCW MODE on an ELECRAFT K3S performs for its spectral purity and waveform preservation of a well constructed raised cosine edged CW NOTE made by the ZamGate CW RE-Keyer - transmitted by an Elecraft K3S using a…

brief demo of having 2 FLdigi(s) sending the same text file at 121 wpm...one FLdigi sending at the pitch of 821 hertz, the other sending at 700 hertz

there are a few QRQ CW OPS that can copy over 100 wpm that have reported in over the past years, stating that they prefer a higher CW PITCH when copying CW above 100 wpm...this short…

*********************************************************************

ADJUSTING TRIGGER MIDI MONO for extremely accurate AUDIO VOLUME input to CW MIDI DATA NOTE output conversion

*********************************************************************

FLdigi will transmit a dit at 200 wpm(1khz [green]square wave using FLdigi's…

this is a follow up to the first video about this topic:

https://youtu.be/BgVdf55w13M

to see how well this RE-KEYING SOFTWARE SYSTEM could RE-KEY low bit rate qrq cw audio over MUMBLE VOIP at 60 wpm

FROM 1st Video on this topic:

low bit rate…

the typical modern RIG, usually shapes its CW TRANSMIT waveform as a raised cosine edged cw note with a Rise and Fall time between 5 and 10 milliseconds....For this test a 7ms rise and fall time of a perfect raised cosine cw note created by FLdigi is used to represent the "modern rigs" and tested against another software CW KEYER called the ZamGate…

Brief test to see how well the ZITA-NJbridge software would do at streaming high quality, extreme QRQ CW, high speed Morse Code audio tones over the LOCAL AREA NETWORK(LAN)(audio OVER ip).  2 tests were done,  one using a "16 bit" digital audio PCM ZITA-stream and another test using a "24 bit" digital audio PCM ZITA-stream.   The ZITA-PCM 24 bit audio stream won the contest by a wide margin, and…

It's been a long hard road but I finally have net access good enough to do iCW. I live in a very rural area in the middle of about 60k acres of woods. Satellite internet just doesn't make it for iCW. Finally got a cell booster and found out 750 MHZ RF does NOT like trees. The system came with a 4 element yagi. Tried several different spots, not consistent enough. Now I've got an 8 element up around 70 ft. in a tree that has a somewhat clearer shot to the tower and it's working reasonably…