开云体育

Just FYI.? I had a problem with my QDX being overdriven with the audio input.? It displayed similar behavior.? The transmit light would flash once and the power output was erratic.? I can tell when the audio is right because the red light flashes and the power output is rock steady.? YMMV.? Prior to upgrading my operating system, I could leave everything at 100% and it worked fine but not now.? (Xubuntu 20.04 to Xubuntu 23.04).? I assume this problem is not limited to Linux, especially with the bizarre way Windows seems to handle I/O devices.

73

Charles - NK8O

What is you transmit power into a dummy load for each band?

-mike/w1mt

Ensure that you have 2.5v at each solder joint for T401.

-mike/w1mt

Wayne,

Be sure to power cycle the QDX between settings changes.? It may be that the settings do not take effect until power cycle and or reboot.

73
Evan
AC9TU

yep, that's what I'm getting. attached is audio scan, looks bad.

Paul DJ0CU?

Ok,?
Probed the clock outputs, nothing, pin 13, sc has nearly 5v on it while pin 14 is very low. Pin 18, pll has 3.3v. Possibly Q7 died??
Andy?
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

Thanks for that catch. I changed that default, but I'm still not getting any audio to the QDX.

Wayne

Wayne,

On the second screen print, I noted that the QDX is the default output device.? It could be that the system is taking over the QDX audio and not allowing the WSJT-X to access it.? Since I do not have the QDX connected to my W11 PC, I can not see other options for the "Is default for audio" tab.? Try one of those.

73
Evan
AC9TU

All,

I would recommend patience.? The QMX has a very capable processor to process the audio.? Hans will add the AGC into the software at some point.? This should be much better than the simple diode limiter developed for the QCX.? Otherwise, you must hack a very tight board to add the limiter.

73
Evan
AC9TU

Here is my setup with the QDX:

Nope.

-mike/w1mt

The AGC kits don't work on the QMX though, do they?

?? true

Wayne,

Based on the TX working with PuTTY, there is most likely a configuration issue with your computer.? I suspect the volume setting for the QDX audio output (Speaker) is most likely the issue.? I am typing this on my one W11 machine to capture the screens.? As stated in my prior email, I do not have a WSJT-X setup for this PC.

Can you verify in the settings that the QDX device appeared on this screen?


Here is the same screen when I add my Bluetooth headphones:



Note that the Headphones are added.? You can then expand the QDX (Headphone in my example) to see the volume settings for that device:



Make sure that the volume setting is at 100%.

Let us know if that solves the problem.

73
Evan
AC9TU

Okay. Now you know one thing it AIN'T!

One obscure issue with time sync:

I have a cellular internet modem (T-Mobile) and it will not allow most of these time syncs, such as Dimension4, or many others, to work. It will also not allow ftp sites to work.

My work around for this is to use a Personal Hotspot from my cell phone. Even though it uses the same cell network and the same tower, this works, while the cellular internet modem does not- go figure.?

But built in time syncs in Windows and Mac OS do work fine, tho.?
--
73, Dan? NM3A

I read this with interest a few weeks ago and would be interested in Hans' thoughts on a commutating diode across L14 and wondering if perhaps there might be a future revision to the QDX?

Check the voltage at C406. One is ground the other should be about 2.5v.

-mike/w1mt

I just tried JS8 Call. I'm still not getting any power out and seeing two flashes on the LED. I also got this error, which I have also seen in WSJT-X: