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Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

?
Thanks for the update.
Do you need to reclaibrate after updating?

No need to recalibrate. The calibration vectors are stored in EEPROM and I did not change anything about the calibration.??

73 Hans G0UPL
Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

Thanks for the update.
Do you need to reclaibrate after updating?
--
? 73
??? KD8CGH
Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

Enjoy it. You deserve it more than anyone else.


On 20 Mar 2025 Per 11:31? Hans Summers? wrote:

Yes yes, going to Spain for 10 days next week during the school break here. Of course, I am sure I will not look at my email at all :-/??

73 Hans G0UPL
_._,_._,_
Re: Diagnostics fail with no BS170s installed #qmx

 

My QMX has been running nicely with the replaced MS5351 but last night I managed to knock the MS5351 off.? Running with no case...
It took a couple of the pads off so another repair is going to be a problem.? Still it showed SSB working.
?
I've ordered a QMX+ kit, It's been something I've been planning to do for some time.? Toroid winding time soon!
?
Chris, G5CTH
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

Hi All
?
Just noticed another firmware update.

beta 1_01_002

1. Bug fix: Update year to 2025 on terminal and LCD splash screen
2. Bug fix: Incorrect percentage completion status in phase error Calibration
3. Bug fix: Changes to SSB drive level did not take effect until leaving config
4. Bug fix: SWR protection was enabled in SSB even when SWR was disabled in menu!
5. Bug fix: CW memory keying activated with Tune DblClick during SSB mode
6. Bug fix: Hardware tests / Audio sweep wasn't working
7. Bug fix: Lockup when entering VFO modes menu on terminal
?
?
Cheers
?
Mal
Excess current (but only a little) #qmx

 

Another happy QMX customer, I admit that the built was challenging, but the excellent instructions and various tips from this group made it manageable, with first time switch on. This is a 12v mid band version, where getting the wires into the holes for L401 is very difficult if not impossible in the case of the 2 common wires from the a and b coils. I do think that if the holes were slightly bigger, then the wires could be tinned, easing considerably the uncertainties over wire stripping and proper solder connection of the toroids.
?
I do however observe ~100mA current drawn on receive on all bands. ?I have measured this various ways using different meters and via the voltage across a 10 ohm series resistor; so I think that this is accurate. ?The device powers up correctly, I have loaded the firmware, tested the transmitter and as far as I can tell is working properly. ?So, I don't think this is a problem, but 20mA is a significant percentage over the expected value and so I wondered whether there is something wrong, or is it within the observed tolerance seen by others?
?
Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

Hi Ton
?
Hans, you should really take a week rest after birth of the SSB QMX. Thanks for everything you are doing for your great group of "testers"

Yes yes, going to Spain for 10 days next week during the school break here. Of course, I am sure I will not look at my email at all :-/??

73 Hans G0UPL
Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

Hans, you should really take a week rest after birth of the SSB QMX. Thanks for everything you are doing for your great group of "testers"
73 Ton
#qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

 

Hi all

I just updated the QMX SSB Beta firmware page with release?1_001_002 which fixes a number of reported bugs, as follows:
  1. Bug fix: Update year to 2025 on terminal and LCD splash screen.
  2. Bug fix: Incorrect percentage completion status in phase error Calibration.
  3. Bug fix: Changes to SSB drive level did not take effect until leaving config.
  4. Bug fix: SWR protection was enabled in SSB even when SWR was disabled in menu!
  5. Bug fix: CW memory keying activated with Tune DblClick during SSB mode.
  6. Bug fix: Hardware tests / Audio sweep wasn't working.
  7. Bug fix: Lockup when entering VFO modes menu on terminal.
Thank you for all your support and testing! I am extremely pleased with how well SSB firmware is working for many?people.?

73 Hans G0UPL
Re: QMX Power on/off loud pop (wife warning update)

 

Thought I send out an update on my fool proof warning system detecting
the wife heading towards the shack with her “to do list”
Hans had some great suggestions but I came up with something that cost?
nothing and works 100 % of the time.
I hung a sign on the outside of the closed door to the shack that reads,
?
SALE-WALMART-SALE?
50% OFF EVERYTHING IN STORE
TODAY ONLY
?
She’s never made it through the door since!!
Dave
VE3ZZY
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

Hi Randy
?
've run into the following bug in 1_00_001:
QMX+: I upgraded from 027 to 1_00_000 then 1_00_001.
QMX: Upgraded from 027 directly to 1_00_001.
Symptom is, upon entering the "VFO Modes" menu location from PC, the radio locks up. No response from Putty, no response to button presses. Resolution is to remove power and restart.
?
This is repeatable every time from the serial interface. It does not lock up if accessed through the front panel buttons.

Thanks - the same thing was also reported by Muhsin TA1MHS and I have reproduced it here, and fixed. I will release a new beta version shortly.?

73 Hans G0UPL
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

Hi Brien
?
A minor discontinuity:? CW memory activates with a double press of the Tune button while in SSB mode.? It does not appear to transmit.? I occasionally get agressive with my button presses on the TUNE button to change tuning rate and accidently activate the CW memory.

Thanks, I have now fixed that bug and will release a new beta version shortly.?

73 Hans G0UPL
Re: Release of version 2.0 of ABS solution for QMX+ (Automatic internal antenna tuner, internal battery and internal speaker with audio amp) #PSU #QMXplus #audio #ABS #ATU

 

On Wed, Mar 19, 2025 at 06:15 PM, Jerry Gaffke wrote:
We could ship a QMX+ main board with the auto-stuffed surface mount parts installed (2.5 oz) for $0.73
Unfortunately you can't.? There is another rule that says if the letter is over 1/4" thick, it goes into a new rate structure - and I would never send a card like that without a bit of padding to avoid destruction in the postal service machines, so it will definitely be over 1/4".? I think those 330uH inductors by themselves are over 1/4".
Stan.
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

On Thu, Mar 20, 2025 at 01:07 PM, <adam@...> wrote:
I can certainly hear the difference.? Can I ask how you got the recording?? I would like to try on my own device.
I'm using an IC-7200 that has a built in USB sound interface.? The IC-7200 is connected to the QMX with about 100 dB of attenuators.? I use Audacity to do the recording on the PC.? Seems to work well for audio comparisons.
?
Glenn VK3YY.
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

I made a recording of testing SSB on my QMX HB on 17M:
?
The setup is QMX transmitting into dummy load and IC705 receiving near by. Overall it sounds pretty good, but there's a tone of 2kHz whenever the noise gating is not in effect (can be seen on IC705's waterfall). When my voice is loud, it seems the 2kHz tone will be attenuated, but otherwise it's quite obvious. Noise cancellation doesn't help - in fact, it raises the background noise by about 10dB. I have some other findings but they're relatively minor. For this 2kHz tone, I'm not sure it's from hardware of software. I'm planning to build a QMX+ to test again.
?
73 Zhenxing Han, N6HAN
Re: .6mm wire included in new kit

 

Hi Dean
?
I just finished the Mid QMX as stated before. I was supplied the thin .330 wire and completed all the windings. All went well and the kit fired up on the first shot and firmware was applied. All bands work as expected except for 60 meters. I'll work on that later.
?
Using the supplied wire gives me less than 4 watts on all bands. My first build with the thick wire gave me 5 or more watts.
?
Thats the only conclusion I can make. I would not call that result "better performance"
?
Any suggestions how I can raise the output?

It's nothing to do with the wire diameter. There must be some other reason. There is always variation from unit to unit anyway. In my tests for whether or not the wire diameter made any difference, I was extremely careful. I used a QMX+ which was the SAME throughout. I removed the choke and replaced the wire on it with 0.33mm. Then made power measurements (oscilloscope Vpp) and spectrum analyzer measurements (for harmonics) on all 12 bands. Next, changed the output transformer too, and re-measured. Finally, changed the SWR bridge and re-measured. The measurements were also done on a 9V QMX. By changing only one component at a time, I could be sure that no other build or components variance parameters could influence the conclusions.?

73 Hans G0UPL
Important Notice regarding weekly. MIQRP Zoom meeting

 

This is a reminder, beginning with the March 20, 2025 Weekly Zoom meeting, the Zoom Meeting ID has changed to 811 0835 6229. The meeting launches at 1600 Eastern Daylight time (2000 UTC).

This is an open meeting to all who are interested in QRP, you do not need to be a member to participate. Our hopes are that if you enjoy participating, you will consider joining the MIQRP Club and support our efforts to promote QRP operations.
Re: QMX+: what does an 'S' in the Practice Mode space mean?

 

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I’ve gotten it a couple of times on my QMX. ?I assume it means that you’ve triggered the SWR protection on the rig.

Don WS9Q

On Mar 19, 2025, at 7:24?PM, Bruce K1FFX via groups.io <rosen.bruce@...> wrote:

?
I'm not sure what I'm doing to make this happen, but I've now twice
had an 'S' appear in that space on the top line of the display where the 'P'
for Practice Mode, etc. can appear.?? Once it shows up, the QMX+ appears
to be pretty much hung and I need to turn off the power supply to get out.
?
I can't find it on the Operations Manual.?? Does anyone know what it
signifies?
?
Thanks!

- Bruce K1FFX
<qmxplus..jpg>
Re: Can't get SWR sweeps to be 1:1 with dummy load

 

Actually one more question here. I tried the q508 voltage tests again with a 10 volt supply. I get a reading of 9.33 volts on transmit, which I think implies that this FET is "leaky" in that current is flowing even though the RX logical signal successfully pulls down to zero volts?
?
I'm wondering if this is actually the source of the problem, in that the FET is only partially protecting the receive chain during transmit.
?
Sounds like I should plan to replace the FET as well, correct?
?
Thanks,
Greg
Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

 

Beta Bug:
I've run into the following bug in 1_00_001:
QMX+: I upgraded from 027 to 1_00_000 then 1_00_001.
QMX: Upgraded from 027 directly to 1_00_001.
Symptom is, upon entering the "VFO Modes" menu location from PC, the radio locks up. No response from Putty, no response to button presses. Resolution is to remove power and restart.
?
This is repeatable every time from the serial interface. It does not lock up if accessed through the front panel buttons.
--
Randy, N4OPI
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