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Re: No receive QMX

 

I'm not sure would have to check, but with 12v I'm getting between 3 and 4 Watts input on each band when connected to an aerial.
Re: USB Device not recognized .... another one #qmx

 

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That, I don't know...

On 8/23/23 22:34, Rick Williams - VE7TK via groups.io wrote:

Thanks for getting back Paul.

You are correct! In my case it should then trip the current limited supply. However, the QMX doesn't draw current at any time and never goes over my pre-set limit?

To confirm, when I apply power to the 2.1mm connector and long press the left encoder, the QMX should go into into Update mode whether it's connected to the PC via? USB cable or not?
--
73, Rick
VE7TK

Website:

Re: #QMX Are these Issues? #qmx

 

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I'll try that!

On 8/23/23 23:06, Chris wrote:

This isn't what I'd expect, my QMX comes on instantly when I press the power on button. It shows the Shut down message a fraction of a second after the long press but doesn't close until I take my finger off, then it's instant.

Thinking a bit I wonder about the controls board, try powering up with just the main board and PSUs, no display, no controls. The current should remain at zero indefinitely. If so you might try shorting pins 5 and 7 on JP201, the connector to the controls board. That's the same as pressing the power on button.

All these things seem to be associated with controlling things.

Chris, G5CTH

On 24/08/2023 06:06, Paul - AI7JR wrote:
Is there some kind of log for QMX issues? Don't want to bore anybody by reporting what's known, or my build defect!

Here's what I'm seeing (I've got Firmware version 9 loaded, 7volts, 250ma current limit):

  1. On application of power, initial current is 0, but goes to around 10ma after 10-15 seconds. Stays steady after it comes up.
  2. On initial power application, power on click is ignored, until the above 10ma step in current.
  3. At that point, power on click "delays" for ~10sec, then display comes on and 150ma current draw.
  4. Tune knob frequency only goes up?
  5. Long press power click displays Shutdown, but LCD never goes off, current (150ma) never drops.
  6. While "Shutdown" is displayed, band and mode can be changed!
  7. Going back to 3, if the power is interrupted briefly (maybe 200mS), device turns off. Pressing power-on click activates immediately!

I what I'm seeing "normal" at the moment? :-)

Haven't gotten so far as to transmit or receive, either one. (Need to read that operations manual!)

Please forgive if this is the wrong place to put this!

73, Paul -- AI7JR


Re: QDX xmit one flash

 

I backed everything down to 80%, but nothing changed.
Re: QDX xmit one flash

 

Hey, Charles. I'll try adjusting the power.
Re: QDX xmit one flash

 

Thanks, Evan. I rebooted my machine, but still no change.
Re: QDX xmit one flash

 

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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

On 8/24/23 10:43, Evan Hand wrote:

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

Re: No receive QMX

 

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

-mike/w1mt
Re: No receive QMX

 

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

-mike/w1mt
Re: QDX xmit one flash

 

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
Re: No receive QMX

 

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

Paul DJ0CU?
Re: Blue screen of death U3s

 

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.
Re: QDX xmit one flash

 

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

Wayne
Re: QDX xmit one flash

 



Re: QDX xmit one flash

 

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
Re: Audio level limiting with diodes?

 

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
Re: QDX xmit one flash

 

Here is my setup with the QDX:
Re: Audio level limiting with diodes?

 

Nope.

-mike/w1mt

On Thu, Aug 24, 2023 at 11:07?AM N1EDC <dragonfanatic90@...> wrote:

The AGC kits don't work on the QMX though, do they?
Re: Audio level limiting with diodes?

 

The AGC kits don't work on the QMX though, do they?
Re: No receive QMX

 

?? true
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