Re: Difficulty after loading ssb firmware beta 1-01-03 on QMX+
I've seen this before when users have deleted the previous firmware before copying over the new firmware. The procedure is to just copy or drag over the new firmware and let the radio replace the old firmware with it. Corruption seems to occur when you manually delete the old firmware first.?
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73, Dan - W2DLC
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Re: Very simple QMX software request
In relation to this topic, is there a shortcut to the "tune SWR" menu? It would be very convenient to access this menu with a simple key press rather than navigate the menus, particularly when using an ATU, to facilitate band changing.
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If there isn't already one, could I suggest a long press on the "Tune" knob to take us to the Tune SWR menu? If there is one that I missed, apologies!
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Many thanks, Hans, for your Herculean efforts with this firmware. It must have taken huge effort to create it in the first place and your responsiveness to issues has been superb! I'm loving it! I hope that you managed a break, although I've still seen responses trickling in on the forum!
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73
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Ellis
GM4GZW
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
I just found another mic capsule on an Arduino MAX9814 board. Took that off to try again.
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Without calibrated, much better audio! Adjusted mic gain and compression. I set the noise gate to 30 and everything else as default. Still not perfect but very much improved and very usable!
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Ran the calibration through and left every thing else as it was and the audio is very rough.
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I'm going to factory reset it again and dial in the setting I was happy with and leave it at that, unless anyone has any suggestions to improve calibration results to improve the audio.
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Note that there is a lot of merit in what Hans says. Not every electret mic are the same. This last one that I found on an Arduino board seems to work nicely.
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Cheers,
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Mel. M0KMD
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hi Myles,
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Yep, I tried the dial back as well. I eventually settled on mic gain of 65 but the audio was still rough without background noise.
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Thanks for sharing your settings.
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Are these setting post calibration?
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Cheers,
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Mel. M0KMD.
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hans' suggestion of microphone can be found on the beta page: under the heading Microphone Choice.? Though I suspect this microphone is more sensitive than needed for HF radio transmission.
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I had a similar issue with the noise you describe when not speaking.? I found it was caused by having the Mic. gain set a little to high.? The sweet spot for me was to actually transmit silence and dial the gain down until that noise disappeared.
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My Mic. gain is set at 75, with Mic. compression set at 14, and Transmit EQ. Global gain set at -8.? Just for reference as all Mics. are different...
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hi Hans,
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Yep, that did cross my mind..
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In fact my first attempt was to use a PC gaming headset with mic. The audio gain was very low from the headset compared to the electret mic's I found in my junk box.
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These electrets seemed to work quite well on my PC. I would have thought they would work equally as well on the QMX...
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I forgot the mention, I also removed an electret mic from a Baofeng speaker mic to use on the QMX. That gave the same results as the other electret mic's.
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Could you remind me of the mic that you used please?
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Cheers.
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Mel. M0KMD
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Re: Very simple QMX software request
OR...one could switch to their trusty Yaesu FT-450D, as I do, during antenna "tuning" :0)
72,
Bill, N4QA/4/QRP Oak Island ( OKI ), North Carolina, U.S.A.
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Did you leave predistortion off during calibration?
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Let me give that a go..
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Cheers,
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Mel. M0KMD
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Yep, done that one. I was using headphones on the IC 7300 whilst testing TX on QMX.
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Cheers.
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Mel, M0KMD
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hi Mel
It's possible the microphone isn't sensitive enough. Turning up the gain increases the audio but also the noise (if the mic SNR isn't enough)
73 Hans G0UPL
Well, I bit the bullet and installed the 003 FW.
Update of FW went all fine, no issue there.
I wired up a electret mic I found in my junk box.
Tested the mic on pc and sounded fine.
I made an adapter using the electret mic and a foot switch for ptt.
The Mic and ppt switch works. But...
Testing SSB TX with QMX on dummy load and listening on my ICOM 7300, the audio is badly distorted before calibration and even worse post calibration. So much so that the speech is unintelligible.
The audio sounds like the QMX is only picking up the peak signals from my voice.
Most of the calibration plots look nothing like the example ones from the release notes. And only a few mildly resemble the examples.
Adjusting mic gain to about 70 seems to improve the audio. However, every time I key up,? there is now an awful lot of noise before I even start speaking. Once I start speaking the audio is ok'ish with a load of background noise.
I tried messing about with other SSB settings with no improvements.
I did find a second electret mic that gave me similar results.
I have now set it back to factory default and seeking advice.
Any suggestions?
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Mel. M0KMD.
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Make sure you are not getting feedback between QMX and IC7300. I had lots of feedback and distortion until I backed the audio way down on my receiving QMX+. I made two QSOs with good signal reports.
Well, I bit the bullet and installed the 003 FW.
Update of FW went all fine, no issue there.
I wired up a electret mic I found in my junk box.
Tested the mic on pc and sounded fine.
I made an adapter using the electret mic and a foot switch for ptt.
The Mic and ppt switch works. But...
Testing SSB TX with QMX on dummy load and listening on my ICOM 7300, the audio is badly distorted before calibration and even worse post calibration. So much so that the speech is unintelligible.
The audio sounds like the QMX is only picking up the peak signals from my voice.
Most of the calibration plots look nothing like the example ones from the release notes. And only a few mildly resemble the examples.
Adjusting mic gain to about 70 seems to improve the audio. However, every time I key up,? there is now an awful lot of noise before I even start speaking. Once I start speaking the audio is ok'ish with a load of background noise.
I tried messing about with other SSB settings with no improvements.
I did find a second electret mic that gave me similar results.
I have now set it back to factory default and seeking advice.
Any suggestions?
?
Mel. M0KMD.
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
HI Mel,
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See my earlier message with a similar issue.
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I had that distortion and then turned off predistortion etc. and it improved.
I re-ran the calibration and then is was OK ( for a bit ) and now have distortion again.
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I don't have time to perform more rigorous testing/recording conditions, but I will post again when I do.
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72 Simon G0FOZ
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Stan,
mine has done that since 001, depending on what menu you have visited before you exit out.?
--
73, Dan - W2DLC
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SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Well, I bit the bullet and installed the 003 FW.
Update of FW went all fine, no issue there.
I wired up a electret mic I found in my junk box.
Tested the mic on pc and sounded fine.
I made an adapter using the electret mic and a foot switch for ptt.
The Mic and ppt switch works. But...
Testing SSB TX with QMX on dummy load and listening on my ICOM 7300, the audio is badly distorted before calibration and even worse post calibration. So much so that the speech is unintelligible.
The audio sounds like the QMX is only picking up the peak signals from my voice.
Most of the calibration plots look nothing like the example ones from the release notes. And only a few mildly resemble the examples.
Adjusting mic gain to about 70 seems to improve the audio. However, every time I key up,? there is now an awful lot of noise before I even start speaking. Once I start speaking the audio is ok'ish with a load of background noise.
I tried messing about with other SSB settings with no improvements.
I did find a second electret mic that gave me similar results.
I have now set it back to factory default and seeking advice.
Any suggestions?
?
Mel. M0KMD.
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Re: mic test doesn't scroll up
I am having the same issue with screen on a Mac. I worked around this by using the microphone calibration from the menu on the LCD screen.?
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Karl Heinz - K5KHK
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Re: QMX+: quick exit from menu system?
+1 for
that!!
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Bill
W2EB
East
Syracuse, NY
toggle quoted message
Show quoted text
Hi Bruce
Good idea, I can add that no problem. I suggest use of the
normal exit button... But a long press to get all the way out of the menu,
compared to the normal many-presses to come up one level at a time.
73 Hans G0UPL
Hi, all -
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Is there by any chance a button push to exit from the menu system back
to
the operational frequency display, i.e., without having to do multiple
EXITs to
navigate up and out?
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[I think the answer is "no", but thought I'd ask anyway.? If so, I'd
like to suggest
something like "long press of the MENU button while in the menu system
will
exit the menu system" ... very low priority, of course!]
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Thanks -
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Bruce K1FFX
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Re: Very simple QMX software request
My preference would be that instead of shutting the power off a high SWR would switch to the Tune power, then when the SWR improves the power is restored (ideally after a delay).? This avoids the need to do something other than using the tuner to get a low SWR while still keeping the QMX safe.
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This may be a bit more work but would make operating using a tuner much easier.
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Chris, G5CTH
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Re: mic test doesn't scroll up
On Wed, Mar 26, 2025 at 12:57 AM, Dave Koberstein wrote:
When running the mic test I get the bottom row. However, it does not scroll up. So I don't see the history covered on the beta firmware page.
I have the same problem.? Settings for one mic seemed OK but I changed mic and it worked OK for a recent SOTA - no unfavourable comments on audio quality.? New mic on the way so I will repeat the test when that is ready for use.
Using Putty on Win11.
Rod
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I'm building a QMX+ and will get to that stage in a day or two but I really doubt that the PCB wiring is incorrect.? I checked some of the connections round T507 and it seems fine.
I've always considered that the wiring instructions for T507 to be totally clear - wind the two transformers one on each side of the binocular core and connect using the holes that seem obvious but people do seem to have the ability to misinterpret this.
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T507 is wired as two separate 10:1 transformers, one through the upper hole of the binocular core, the other through the lower hole.
Holding the board with the RF output in the lower right corner the T507 connections are two vertical rows of 4 holes just to the left of the RF BNC:
- The top pair of holes are used for the ends of the upper 10 turns of the upper transformer.
- The upper centre pair of holes are used for the 1 turn wire for the upper transformer, this comes straight from the upper centre left hole to the upper centre right hole, through the upper hole of T507.
- The lower centre pair of holes are used for the 1 'turn' wire for the lower transformer, this comes straight from the lower centre left hole to the lower centre right hole, through the lower hole of T507.
- The bottom pair of holes are used for the ends of the lower 10 turns of the lower transformer.
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Hope that helps, if you have a problem then photos showing exactly what you have done will be useful.
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Chris, G5CTH
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Re: QMX+ Strange Audio Artifact - Help, Please...
On Wed, Mar 26, 2025 at 10:21 PM, Jeffrey W Moore wrote:
I use this from DigiKey:
399-4701-1-ND
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The corresponding Mouser number is: 80-T495D477K006E100
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Daniel Conklin
Bill, N4QA/QRP
Si Smith