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More recent testing on my QMX+, QMX-LB, QMX-HB, and QMX-MB.?
I have used them all in field operations (mostly POTA, some SOTA) with good results with all of them.
FIRST:
Click/Thump (c/t) issues are pretty similar on all 4 units whether they have 1...018 or 1...019 F/W. And the issue is NOT gone, although THUMP SUPPRESS (TS) does help.
Biggest variable is SIDETONE VOLUME (STV). The lower the volume, the worse the c/t is.?
ABS ST:? STV-70? Minor c/t with only very slight worsening with TS OFF. Much worse at STV-30 with significant worsening with TS OFF.
REL ST:? STV-99? No c/t with slight worsening with TS OFF.? ?STV-70? Almost no c/t with significant worsening with TS OFF. However, the STV is WAY too high at 70. Significant c/t at STV-20 with extreme worsening with TS OFF.
I believe this STV issue is the reason why some have had horrible c/t issues, while others have had little trouble.
Usual settings for AGC, ST:
AGC-ON; Threshold-S-8; Slope-40; NoiseFilter- 10; HandTime-30; SmoothSamples-50; Recovery-40; SampleBlocks-2; S9-9; ThumpSuppress-ON; STVol-70; ST-ABS.? With these settings, the c/t is low level and not particularly bothersome.
SECOND:
There is a constant tone (RX) in my QMX+ on 12, 11, 10, & 6 metres. Tuning around does not change it. It is relatively low in volume, but very noticeable. It varies with volume level and is higher in pitch than the ST - about 800-900 Hz, I'm guessing. An identical tone is also present in my QMX-HB on 12 & 11 metres only - curiously not on 10 m.?
THIRD:
There is still a slight delay in the initial element of a transmission. It does not shorten the initial element, just delays starting it. This is somewhat infrequent and random in occurrence and only rarely happens once a sending sequence has started. It is probably less than a dit long, but just enough to be noticeable and throw off one's rhythm unless you really pay attention. This is the same on all 4 units and is the same on both 1...018 & 1...019.
FOURTH:
QMX+ on 160 m cannot be tuned. As soon as any tuning is attempted on 160 m, the frequency changes to 3200 kHz and will not go below this. Storing a 160 m preset does not help, as recalling it also changes the frequency to 3200 kHz.
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73, Dan? NM3A
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With the inability?to tune <3200 KHz, could the QXM+ have been set up to be a QMX lowband? 73
More recent testing on my QMX+, QMX-LB, QMX-HB, and QMX-MB. I have used them all in field operations (mostly POTA, some SOTA) with good results with all of them. FIRST:Click/Thump (c/t) issues are pre
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DuckDuckGo did not detect any?trackers.
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More recent testing on my QMX+, QMX-LB, QMX-HB, and QMX-MB.? I have used them all in field operations (mostly POTA, some SOTA) with good results with all of them. FIRST: Click/Thump (c/t) issues are pretty similar on all 4 units whether they have 1...018 or 1...019 F/W. And the issue is NOT gone, although THUMP SUPPRESS (TS) does help. Biggest variable is SIDETONE VOLUME (STV). The lower the volume, the worse the c/t is.? ABS ST:? STV-70? Minor c/t with only very slight worsening with TS OFF. Much worse at STV-30 with significant worsening with TS OFF. REL ST:? STV-99? No c/t with slight worsening with TS OFF.? ?STV-70? Almost no c/t with significant worsening with TS OFF. However, the STV is WAY too high at 70. Significant c/t at STV-20 with extreme worsening with TS OFF. I believe this STV issue is the reason why some have had horrible c/t issues, while others have had little trouble. Usual settings for AGC, ST: AGC-ON; Threshold-S-8; Slope-40; NoiseFilter- 10; HandTime-30; SmoothSamples-50; Recovery-40; SampleBlocks-2; S9-9; ThumpSuppress-ON; STVol-70; ST-ABS.? With these settings, the c/t is low level and not particularly bothersome. SECOND: There is a constant tone (RX) in my QMX+ on 12, 11, 10, & 6 metres. Tuning around does not change it. It is relatively low in volume, but very noticeable. It varies with volume level and is higher in pitch than the ST - about 800-900 Hz, I'm guessing. An identical tone is also present in my QMX-HB on 12 & 11 metres only - curiously not on 10 m.? THIRD: There is still a slight delay in the initial element of a transmission. It does not shorten the initial element, just delays starting it. This is somewhat infrequent and random in occurrence and only rarely happens once a sending sequence has started. It is probably less than a dit long, but just enough to be noticeable and throw off one's rhythm unless you really pay attention. This is the same on all 4 units and is the same on both 1...018 & 1...019. FOURTH: QMX+ on 160 m cannot be tuned. As soon as any tuning is attempted on 160 m, the frequency changes to 3200 kHz and will not go below this. Storing a 160 m preset does not help, as recalling it also changes the frequency to 3200 kHz. -- 73, Dan? NM3A
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Jay,
?I believe that the 3200 kHz low limit was introduced by Hans to prevent some (unknown to me) issue in the past. I am sure he will correct that in the next f/w version. I think he's rather busy these days, though.
I don't know if other f/w setups (HB, MB, or LB) will work properly with the QMX+. There are a different number of LPFs and BPFs and they have different bands that each covers, so I doubt that you could use other than the 160-6m version and have it work properly in the QMX+.?
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73, Dan? NM3A
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Jay, I just reread your message. Obviously I misunderstood you. No, it was set up correctly as a 160-6 m QMX+.?
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73, Dan? NM3A
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Hi Dan,
That has been my observation too - the sidetone click/thump issue hasn’t been resolved and is dependent on sidetone volume. ?Yes, folks who run high sidetone volume are not likely to hear thumps. Those of us who prefer lower sidetone volumes will still be hearing the clicks/thumps. ?And it doesn’t depend on the Absolute/Relative sidetone setting. ?At very low sidetone levels (which you’d likely never use) - it’s all thump and no sidetone, with the thumps gradually decreasing as you increase the volume.
73,
John VK7JB
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Hi gang, I just received my QMX+ kit so no operating experience, but I’m wondering if the three power rails are rock solid as you key the rig?
John
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Yes no issue with the power rails. 5V and 3.3 V are good for the plus and the mini. The plus has much bigger Vin traces and there is very little voltage drop to the finals on key down. The mini QMX drops Vin about 1 to 1.5 V to the finals. Probably due to smallish power traces. Not a big deal for me.?
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73, Dan? NM3A
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Regarding the SECOND issue in this thread (see below). My build has the exact same issue. I can't see any reply or remedy for this.
Is it on the to be sorted list?
73
Ian G4GIR
SECOND:
There is a constant tone (RX) in my QMX+ on 12, 11, 10, & 6 metres. Tuning around does not change it. It is relatively low in volume, but very noticeable. It varies with volume level and is higher in pitch than the ST - about 800-900 Hz, I'm guessing. An identical tone is also present in my QMX-HB on 12 & 11 metres only - curiously not on 10 m.?
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Luwig, I s your response in connection to my post?
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If it is, there is nothing mentioned in that link concerning the continuous tone from 12mtr through 4mtr.
It would be nice to know if anyone else has this problem apart from Walter and I.
I checked the QMX High Band ? I have and it is not present.
Thanks for the link.
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73
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Ian G4GIR
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toggle quoted message
Show quoted text
----- Original Message -----
Sent: 10/06/2024 19:23:44
Subject: Re: [QRPLabs] QMX/QMX+ Thump/Click & other issues
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Ludwig,
?I am aware of those postings. I have played around with all of them, but the AGC settings do not make a lot of difference. It's especially the Side Tone Volume level and alsowhether the Side Tone is set to Relative or Absolute.?
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73, Dan? NM3A
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On Mon, Jun 10, 2024 at 02:43 PM, Ian G4GIR wrote:
Regarding the SECOND issue in this thread (see below). My build has the exact same issue. I can't see any reply or remedy for this.
Is it on the to be sorted list?
73
Ian G4GIR
SECOND:
There is a constant tone (RX) in my QMX+ on 12, 11, 10, & 6 metres. Tuning around does not change it. It is relatively low in volume, but very noticeable. It varies with volume level and is higher in pitch than the ST - about 800-900 Hz, I'm guessing. An identical tone is also present in my QMX-HB on 12 & 11 metres only - curiously not on 10 m.?
Ian,? I have the same to me it sounds like processor noise again only on 12, 11, 10, & 6 metres.? I dont know if the frequency sensitve SMPS control is implemented on these bands but it might be a source or indeed the main CPU. One for Hans.
Rgds, Clive
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On Mon, Jun 10, 2024 at 10:29 PM, Ian G4GIR wrote:
Luwig, I s your response in connection to my post?
Ian, sorry I have no clue about the continuouse tone. Following the link you may find something related to "thump / click". Btw, using my LB and HB QMX I heard never such a tone. 73, Ludwig
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On Mon, Jun 10, 2024 at 11:05 PM, Daniel Walter wrote:
?I am aware of those postings.
Daniel, I guess No 2 and 3 at the end of the linked document is related to "clicks". Maybe this could explain something. 73, Ludwig
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Hello Clive,
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Hope so, guess it is one for Hans.
Along with this tone, have you noticed the hash noises when tuning on 10m. It kicks in around 28.05 and disappears around 28.2, then starts again at 28.3 and goes away at 28.4 then starts again at 29.05?and stops at 29.2?This is with a dummy load fitted.
This noise appears on all the bands, but the bandwidth narrows as the frequency is reduced. It seems to start around 50 KHz from the band edges where the bands start with i.e 14, 7, 21 ?MHz etc.
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73
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Ian G4GIR
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toggle quoted message
Show quoted text
----- Original Message -----
Sent: 11/06/2024 15:21:06
Subject: Re: [QRPLabs] QMX/QMX+ Thump/Click & other issues
On Mon, Jun 10, 2024 at 02:43 PM, Ian G4GIR wrote:
Regarding the SECOND issue in this thread (see below). My build has the exact same issue. I can't see any reply or remedy for this.
Is it on the to be sorted list?
73
Ian G4GIR
SECOND:
There is a constant tone (RX) in my QMX+ on 12, 11, 10, & 6 metres. Tuning around does not change it. It is relatively low in volume, but very noticeable. It varies with volume level and is higher in pitch than the ST - about 800-900 Hz, I'm guessing. An identical tone is also present in my QMX-HB on 12 & 11 metres only - curiously not on 10 m.? Ian,? I have the same to me it sounds like processor noise again only on 12, 11, 10, & 6 metres.? I dont know if the frequency sensitve SMPS control is implemented on these bands but it might be a source or indeed the main CPU. One for Hans.
Rgds, Clive
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I have horrible clicks and sidetone level even at 50 is waaay to loud.? If i reduce st level to 25 tone is about what i like but clicks become unbearable, loke the headphones will pop.
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Jay W6CJ
John, WA6YSY
Clive - G4KCM