Chuck aa0hw's Blog – June 2019 Archive (3)

QRQ CW Sidetone input for Mumble Voice Chat using MFJ-451 CW Keyboard & a telephone pickup coil

This is a follow up to the previous video using a CW KEYER:

https://youtu.be/4xXtQK57ssM

in this video, QRQ CW from an MFJ-451 CW KEYBOARD is utilized as the example

most of the modern PCs & Laptops on Windows 10 - do not have DIRECT audio INPUT MONITORING available...this video demoS…

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Added by Chuck aa0hw on June 30, 2019 at 10:23am — No Comments

QRQ CW audio & webRTC - issues and solutions for getting GREAT CW AUDIO QSOs over the internet

webRTC usually comes stock with several audio processing engines in place .... like AGC, NOISE FILTERING, ECHO CANCELLATION which all of them will destroy how QRQ CW sounds over webRTC's OPUS AUDIO CODEC audo processing engines...

used in this example is webRTC from JITSI MEET:…

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Added by Chuck aa0hw on June 14, 2019 at 12:56pm — No Comments

What QRQ CW sounds like at 75 wpm on a Tuned Radio Frequency(TRF) Receiver

Brief demo of using this TRF RECEIVER circuit(LINKED BELOW) to monitor the RIG's CW TRANSMIT - RF NEAR field - of my RIG's antenna on 80 meters

setup to listen to your rig's CW, using the RIG's antenna's NEAR FIELD RF EM - picked up by a TRF receiver's FERRITE ROD antenna - BFO'd by a simple VFO circuit

TRF Transmitter monitor…

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Added by Chuck aa0hw on June 2, 2019 at 8:57am — No Comments