Always gotta be a complainer in the bunch. ?Kidding me? ?Hans is doing fantastic. ?SSB will happen eventually. ?The QMX+ was the next logical step. ?
Todd K4MSW
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Hi,
I finally have some spare time to sit down and assemble my QMX kit! It looks like the website has different assembly instructions for different PCB revisions. How do I check which one is the one I have? Are there any markings on the PCB that indicates its version?
Any tips regarding assembling the kit would also appreciate it :)
Thank you,
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But even without 160 and 6, you're getting all the bands in one radio rather than needing to carry two. So there is that.
I for one, am extremely disappointed in this announcement.? ?I was expecting the announcement of firmware that would give us the long awaited SSB.? Instead we got 2 new bands that have very limited usability at qrp levels.? How many qrpers have a portable antenna for 160?? And 6 has to have a band opening.? ?This is not a condemnation of the announcement,? just an explanation of my disappointment.? ?Hans, when can we reasonably expect firmware that will? give us SSB?
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I for one, am extremely disappointed in this announcement.? ?I was expecting the announcement of firmware that would give us the long awaited SSB.? Instead we got 2 new bands that have very limited usability at qrp levels.? How many qrpers have a portable antenna for 160?? And 6 has to have a band opening.? ?This is not a condemnation of the announcement,? just an explanation of my disappointment.? ?Hans, when can we reasonably expect firmware that will? give us SSB?
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I'd like to hear his 'Top 10 Junkbox projects'.? Do you know if his presentation will be recorded?
Dave
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Re: FLDIGI and QMX transmit RTTY - probably solved (?)
Jindra,
I read your message with great interest as I am also having difficulty transmitting RTTY from FLDIGI.
I made the changes you mention, and made sure the TX attenuation was set to 0.0 and am able to press the tune button and now a tuning signal is sent, showing about 3.5 watts of output.
However, if I try to send a test RTTY transmission, TX will key, but it goes back to RX in a second or two while FLDIGI continues to transmit until the end of the test message.? The QMX continues to work, not like the protection circuit have been activated and it needs to be reset.? All subsequent attempts of a RTTY transmission fail in the same manner.
Tried all the different bands and the problem is the same.? You have any other ideas?
Mark KD0QYN
On Wednesday, May 15, 2024 at 10:27:28 AM CDT, ok4rm <radio.miskovice@...> wrote:
Hi, folks,
I probably found a solution. It seems to be not in QMX but rather in FLDIGI (and other software as well).
In FLDIGI: Config dialog/Soundcard/Right channel. check "Modem signal on left and right channels". After this it should start transmitting. N.B. there is a TX indicator under VFO id (A or B is smaller than regular A or B because additional pixels are displayed during transmission mode). See pp. 63 and 64. Before activating right channel I always got two dots... Clearly, QMX receives its input from the right channel and the left channel seems to be ignored.
The setup example with WSJT-X shown in the Operation manual page 59 suggests that "mono" mode of the sound card be used (hence feeding both channels with the same signal). That's probably why I did not find any mention of "only the right channel is the right channel" for digi transmissions in the Operation manual. @Hans, could you please add somewhere a small note for those unlucky types like myself?
What? is a mystery to me is why software developers (such as W1HKJ or KN8CRD) somehow assume that "left channel" is the default and leave the right channel silent as default, while some other guys, such as the developer(s) of Digirig all-in-one box or our valued friend Hans design the circuitry in exactly the opposite way, taking audio signal from the left channel and ignoring the right channel :-D
I also made one more change in QMX menu:
Digi interface/minimum samples: changed from 480 to 16. Not sure how well this will work, but I cannot actually test it because there are zero RTTY stations on 80, 40 or 20 meters all day long. Hopefully i could find a sparring partner (preferably Central Europe, Germany and Italy sound best on 40 meters, DL and SP on 80 meters).
I hope I saved a lot of time and removed despair and frustration for all users of FLdigi, JS8Call and other software employing weird soundcard setup.
With my best 73,
Jindra?
OK4RM
a.k.a. "the cause-of-a-trouble detective" :-D
?
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Re: QCX Mini just finished but no input voltage reading
I just had a thought, do I need to tighten the washer as flat as possible over the mosfets on Q1,Q2,Q3 and Q6? Also, do I use DC or AC to test the voltage? I've heard AC, but on some using an Oscilloscope they say to use DC. I will check the gate and drain voltages again when I get home tonight.
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Re: #qmx+ Announcing new QMX+ 160-6m multimode transceiver kit
Hans:
Wow, this is just plain "Christmas in May" here in Phoenix.? Thanks for the extra breathing room in the PLUS kit!? As well as
all of the bands !!
72
Mark
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Re: #qmx update and 60-15m
#qmx
Now that my 60-15M QMX kit has arrived, it seems that mounting the toroid as suggested by Hans allows for easier access to the inductor turns to shift the 20-17M filter bandpass if required.
va3rr
toggle quoted message
Show quoted text
On Wed, May 15, 2024 at 12:12 PM, va3rr wrote: ... But in the photos on
page 39, the toroid seems to be flipped, which would put turn 0 closer to the
"end" hole and turn 24 nearest the "start" hole . I'm not sure if I'm just
mis-reading the instructions, as my kit hasn't arrived yet, and I am
pre-winding some toroids in anticipation thereof...
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50v NP0 or COG. Silver Mica might be ok, but more expensive. No X7R or lesser spec caps...
The cap you spec'd is likely identical to the original...
Russ, va3rr
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50v NP0 or COG. Silver Mica might be ok, but more expensive. No X7R or lesser spec caps...
Russ, va3rr
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Re: #qmx+ Announcing new QMX+ 160-6m multimode transceiver kit
That is awesome. Ordered but forgot to add the GPS module. Hans if you see this I've dropped a service ticket to see if one can be included but no worries if not.?
Couple of observations. The text on the store page seems to have been cut and paste from the QMX and refers to a 5 band transceiver quite a lot and the link to the GPS module is broken.?
Very excited though. I was about to order a new high band kit have messed up the first. This is better. Much better :)
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Hi Peter
Where did you adjust the VOX thresholds and what settings did you use please.
cheers
Richard
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Shirley KE1L wrote... Try try try to understand, it's the magic band... It is a magic band! For those that got the reference, there are probably thousands of people listening to Heart's Magic Man right now! I suppose it comes under famously mis-heard lyrics, but I'm glad that I'm listening to it now. I'm also listening on 6m! (band) -- 73 Keith VE7GDH
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Re: FLDIGI and QMX transmit RTTY - probably solved (?)
Hi Jindra
Fldigi is in a sense infinitely configurable L vs R channels. ie "normal", "reversed" or "both". The "non" channel can also be used to TX a fixed amplitude audio tone in external device VOX PTT. Handy if the signal audio is varied near the PTT threshold. Some Icom rigs put main/sub audio on L vs R as well.
I have successfully used fldigi VK>EU with the QDX using a minimum samples between 120 and 180, but that is more for "faster" modes like Thor and Olivia. Going too low puts slewing squeaks on the output. At 120 it wont TX a clean "wider/faster" modem like Thor 56, so would need to be less. I also modified the risetime/falltime parameters (2/40 on last test) to disable the raised cosine PTT inhibit as it was chopping the TX on and off despite 0dB audio. This also made it sound a lot less ragged, but I didn't do any RX s/n tests to check. I actually use/record a remote SDR for my testing. I have not experimented with RTTY at all.
I have setup some flrig command buttons to change minimum samples and RX audio as well. Can be altered during a QSO. I think this could also be done with a fldigi <RIGCAT...:> or <FLRIG...> command.
Certainly very enjoyable to experiment with.
Cheers Bob VK2YQA
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I'm looking forward to getting mine and putting it on 6 meters. Try try try to understand, it's the magic band...
Once the SSB firmware is out, that will be a very hard to resist offer!!!
73,
Yannig - F4IUJ
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I damaged C402 (220 pF capacitor) during my build of the Rev 4 12v LB QMX (80-20m). Although I located a , the QMX build manual does not provide component specs and I'm not sure how critical the voltage rating and tolerance may be. As far as I can tell, the dimensions of the component in the link are OK and I know Hans uses Vishay components. Can anyone offer insight regarding an acceptable replacement? I believe Hans is away for the next few weeks.
¡ª¡ª¡ª¡ª¡ª¡ª¡ª¡ª-
Jim?
N7RCS
Palm Bay, FL
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Once the SSB firmware is out, that will be a very hard to resist offer!!!
73,
Yannig - F4IUJ
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Re: Antenna tuner companion for QMX?
#qmx
On Thu, May 16, 2024 at 05:01 PM, Todd - K4MSW wrote:
Do you have a pic of the enclosure and front panel?
new one has two LEDs
?
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Has anyone figured out an effective and sturdy way to add 12V of battery power under the larger covers ?
73 Kees K5BCQ
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Shirley Dulcey KE1L
Joe AI5DD
Mark WO7T
va3rr