Hey you can play the SSB'd version of Highway to Hell in the background while assembling a shiny new QMX or QMX+ kit while waiting for the new firmware!
-Steve K1RF
------ Original Message ------
Date 10/17/2024 4:01:05 PM
Subject [QRPLabs] Torturing QMX+ CESSB...
Hi all
Muhsin TA1MHS (visiting) asked what happens if we try transmitting music over QMX+ CESSB... Resulting recording is attached for your entertainment.?
Remember?this is an actual transmission of SSB from a QMX+ to a QMX 80-20m with 63dB of coax inline attenuators in between. Power output is 1W PEP (leaving a little over 6dB of dynamic range on the table for when full power 5W is used). Frequency is 7030kHz with all due apologies to the QRP calling frequency (no microwatts were delivered to any antenna during this experiment).?
CESSB is switched on with the threshold set at 1W PEP. My PC played a YouTube video into the QMX+ over its USB soundcard; the other QMX is also connected to the PC and I used Audacity to record the received audio.?
Sounds pretty great!?
We actually recorded a nice video but YouTube blocked it on copyright grounds (recognizing the audio content); which is a bit weird considering we were actually?playing a YouTube video of it into QMX+, so why was that one allowed but not the recording of the re-transmission via QMX+ CESSB. Anyway.?
