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Potential buyer here, When the embedded STM USB sound card is detected by Windows does it set 'correct' bit depth/sampling rate? I've been reading over the QDX Instruction manual's circuit

Andy, The trials that I have done do not point to a USB audio issue.? There is something disturbing the QDX that causes it to go into a state where the opposite sideband is not being suppressed as

The next step would be to get some snapshots of what the OS thinks it has connected and probably to split it into 2 threads, 1 for Windows and 1 for Linux. Get the QDX working OK and then capture the

Unfortunately disabling USB auto suspend did not solve it for me. After a while the RX audio level was zero, JS8Call was in TX mode but the QDX not. And the audio and RF filter sweep looked as below.

Hi All, Everything was working fine, and then I switched firmware 1.01c.? When I loaded it up the QDX LED turned off.? I removed the power and then plug it in and the fast flashing occurred as usual

I have found that my issue was the different max audio out variation in my various windows machines (with out levels set at 100%).? On one laptop QDX works on 40M only and on an old windows tablet it

Hi Andy, This is interesting! I remember getting a 4-bay USB DAS to enumerate only after disabling auto suspend. So I just disabled auto suspend (added kernel option usbcore.autosuspend=-1) and

Guys, There seems to be lots of people with their guaranteed cures for USB issues all of which are ignoring the elephant in the room. USB is a hugely mature technology and if things are going wrong,

Oh yes, I use a third tool if I know who I'm looking for http://www.reversebeacon.net/srch.php (you can do this also with the map version, but this one has a simpler interface) just type the callsign

Hi Hans, we understand ... busy times for you. But of course we will be happy when you are back in the QCX parties ! Chris, best is to join the discord sked page (

Chris I have seen your post too late. its rather 10116. Yesterday condx were no fun.? A bit like the actual weather. 13:00 session only OK2BQN from the QCXes made it to have a QSO. 19:00 30 m was

Hi Robert, I found this info...see attachment. Maybe you have only damaged the 7805 regulator?? 73 Ken g4apb

Ben, I find this to happen sometimes. I tend to think it happens if I do not leave the QDX unpowered long enough, one minute or more? But all I'm certain of is that it does not always start correctly

The lines are what you would see on the audio input (QDX to PC) when the QDX is normally in TX mode. So maybe a CAT / serial issue. JS8Call thinks it is in RX mode, but the QDX audio was still cut

I got the same yesterday evening. Tried everything on Linux (power down/up a few times, factory reset, pc reboot) then switched to Windows and it worked again. Don't know what triggered it. But this

Hi Julian, Jay expire That's an academic point anyway. Since you never stop paying for it, the scenario never arises. As for the pull-up resistor... this 1.5K pull-up resistor is part of the Full

On Fri, Nov 12, 2021, at 08:49 PM, Evan Hand wrote: > > * Windows10 Home. > * Firmware 1_01c. > * Built for 12 volts operation > * Both Battery and switched DC > * Rev 1 Board > * One deviation:

Hi Alan The key-down threshold is set in the QDX configuration screen at 80% amplitude. This setting is adjustable if you wish. But yes at default, 2dB would be about it. There's no advantage to be

Yes, obviously the first thing? you'll have to do is select the band, then manually entering the cal number into alignment menu (8) will certainly will certainly be close enough: that's Reference

I have the chip on order to update a 20 meter QRX+ radio fitted with the 1.06 software. I assume I will need to re-calibrate the radio after I install the new chip. Will it suffice to note the 1.06