Re: Simple and very tiny mic for the QMX.
#qmx
#ssb
On Sun, Mar 23, 2025 at 02:46 PM, Bryan Curl wrote:
If so how do you solder that stuff?
Hi Bryan,?
It uses very fine multi-stranded enameled copper wire which is pretty easy to work with. You just need to hold the wetted iron to it long enough for the enamel to burn away. I set the temp to about 380°C.
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There is another type of wire that has tinselled flat-ish strands. That may be what you're referring to. It was used in some headphone cables.? That's a pig to work with and probably best replaced with something less troublesome.
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Cheers,?
Ronan
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Re: Loopback devices and Headsets on Linux
#qmx
#ssb
Here are two bash scripts that should make it easy to setup loopbacks
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Roger, Thanks for sharing the info.? I was wondering is the Kanga tuner case metal or plastic? I couldn’t find any info in their manual.?
73, Ken K9ZI
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On Mar 23, 2025, at 3:25?PM, Roger Dallimore via groups.io <mw0idx@...> wrote:
? Hi Joel,
I was using my 44' doublet with 300 ribbon feed, Elecraft balun, and the ATU is from Kanga, the Pocket Transmatch.
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73
Roger MW0IDX
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Re: Using the QMX+ with an auto-tuner
On Sun, Mar 23, 2025 at 01:07 PM, Stan Dye wrote:
Just use the Tune SWR feature
Thanks for the response, Stan ... I've hunted through the Operations Manual and
I can't find a reference to this feature.? [I have seen that in diagnostics mode, certain
tests turn off SWR protection and use 1/4 power, but not sure if this related to
this antenna tuner scenario.]
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Can you point me in the right direction?
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Thanks -
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Bruce K1FFX
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On Mar 23, 2025, at 3:08?PM, Jason via groups.io <ltanhonorsmiter@...> wrote:
? It looks like a Phoenix Transmatch?
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?https://qrper.com/2022/03/richard-recommends-the-qrp-pocket-transmatch/
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Re: QMX+ / USB / CAT / Windows 7
On Wed, Mar 19, 2025 at 12:43 AM, Alan G4ZFQ wrote:
Magic sauce indeed, Alan ... thanks very much for the pointer ... worked perfectly.
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- Bruce K1FFX
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Hi Joel,
I was using my 44' doublet with 300 ribbon feed, Elecraft balun, and the ATU is from Kanga, the Pocket Transmatch.
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73
Roger MW0IDX
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hi, just setting up my new and very handy GoBox, a beauty case by UGREEN, approx. L22 x W14 x H8 cm, with hand strap and carabiner hook.?
Equipment inside is the QMX, a talentcell powerbank, noname speaker and the tiny paddle by .
Only some coax , an 8m-pole with transport length only 70cm and the have to go in an extra little package to fit into my bicycle trailer? ;-))
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inside look :
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the case:
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hopefully the spring / summer comes soon so i can get into our park or forest for /p operation.
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vy 73 and hope to meet you OTA?
Udo DF4BJ /qrp
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Pierre,?
? ? ?The BPF sweep problem on 20M on High band QDXs has been there for most people, and L12 changes to fix it haven't been established that I've seen. Doesn't seem to be much you can do about it, but make sure the audio level on that band is appropriate in WJST-X..and seems to still work pretty well on 20M for me.?
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As far as power output, the middle set of toroids is for 15/17m... And I've found those to be a tradeoff...messing with them to increase power on 15m may mean a slight decrease on 17m.?
If you study the QDX manual and schematic, you can see which toroids affect which bands. There are 3 sets of LPFs, and they are assigned to different bands in the terminal application.?
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-Nate
N8BTR
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It looks like a Phoenix Transmatch?
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?https://qrper.com/2022/03/richard-recommends-the-qrp-pocket-transmatch/
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Re: Using the QMX+ with an auto-tuner
Just use the Tune SWR feature.? It (by default) uses 1/4 power, which is low enough that even very high SWR won't cause damage.? And SWR protection is automatically disabled in this mode.
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newest go-box with QMX, Talentcell powerbank, noname speaker and tiny paddle by N6ARA, completly fits in a beauty case by UGREEN.... only a portable 8m pole (70cm packed) and some coax as extra package? ;)
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Re: shorted PA on TX, dead SMPSU?
Ludwig
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Thanks for your coment, with sub-boards removed, I have 6.6k ohm gnd to Vcc and 2.3k ohm gnd to Vdd.
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Do you think this indicates something broken on the main board?
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Dan
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Re: Using the QMX+ with an auto-tuner
Perhaps, ill-advisedly, I turn off my SWR protection long enough to tune, then turn it back on.
--
73 Michael N6QP
Up in Thin R
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Using Retevis HK-008 speaker microphone with QMX for SSB
Hi all, while I am eagerly awaiting the stable release of the SSB update (not brave enough for the beta) I am trying to figure the microphone situation.
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I am absolute newbie both in amateur radio and all the electrical stuff, including wiring and soldering. So naturally I was looking for video tutorials on YouTube.
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Will this contraption work for QMX?
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https://youtu.be/Ih6scBu1Mko?si=Jts6MUJGJWOhiz_6
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I keep reading that everything made for the trusdx should do, but that's primarily for the microphone. How about the speaker?
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If I follow this tutorial 100% will I be ok both in terms of audio and microphone?
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Thank you :)
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Re: CW Practice / Rag Chew
we can just see Ed 14.058.5, on the 7300 scope and copy is 55n from OR. ?can't hear any others.
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Using the QMX+ with an auto-tuner
I am using my new QMX+ with the HardRock-50+ (HR-50+) amplifier with its
integrated ATU.
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The ATU requires a bit of RF energy to trigger the tuning procedure.? So, one
pushes the Tune button on the amplifier and then you key the QMX+.? When
tuning begins, the amplifier takes itself off-line and QMX+ is then driving
the ATU directly.? So, at that point, the QMX+ could (and probably will) encounter
a mismatch, its SWR checker goes into action, and the QMX+ is taken off-line.
I was able to confirm this by putting a watt meter between the QMX+ and the
amplifier.
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Parenthetically, this would also be the case with a manual tuner.
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So (and risking that this has been covered already a dozen times), how does one
tune an antenna without triggering SWR protection in the QMX+?
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Thanks, all!
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- Bruce K1FFX
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it worked but now a new bug where I don't know where to look. QMX+ is selected in WSJTX input and the PC and decoding is ok but no transmit and when I try to transmit I get? a rig control error.
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WSJT-X
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Rig Control Error
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Do you want to reconfigure the radio interface?
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OK ? Retry ? Cancel ? Configurations... ? Show Details... ??
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Hamlib error: 0000 ? ?49 46 30 30 30 32 38 30 37 34 30 30 30 20 20 20 ? ? IF00028074000 ??
0010 ? ?20 20 2b 30 30 30 30 30 30 30 30 30 30 36 30 30 ? ? ? +0000000000600
0020 ? ?30 30 30 30 20 3b ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0000 ; ? ? ? ? ?
ic10_cmd_trim: incoming data_len is '37'
ic10_cmd_trim: data['36'] is ' '
ic10_cmd_trim: For i='37' data_len is now '36'
ic10_cmd_trim: finished loop.. i='36' data_len='36' data[i-1]='0'
?1:rig.c(2563):rig_passband_normal entered
rig_passband_normal: filter not found...return 0
?1:rig.c(2591):rig_passband_normal returning(0)?
rig.c(2314) trace
ic10_set_mode: unsupported mode PKTUSB
rig_set_mode: targetable retcode after set_mode(PKTUSB)=-1
Invalid parameter
0:rig_set_mode: elapsed=33ms
0:rig.c(2369):rig_set_mode returning(-1) Invalid parameter
Invalid parameter
Invalid parameter
?while setting current VFO mode
Timestamp: 2025-03-23T19:49:28.835Z
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PC is Win 11
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any ideas ?
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PS my Flex 1500 works for WSJT-X and I could toggle between the rigs before
And the QMX+ works in CW
--
Martin
DK3UW
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Hi Roger, Looks like a nice setup. I am wondering what tuner you are using in the photo?
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On Mar 21, 2025, at 12:06?PM, Roger Dallimore via groups.io <mw0idx@...> wrote:
? Last night I downloaded the latest firmware and threw together a rather basic microphone, and after going the the calibration tests it appeared to be working well into my main station transceiver. This afternoon I went to my local SOTA summit and was very pleased how well the QMX on SSB worked. Although I'm mostly a CW op its great to have another another mode available in such a small radio, ideal for SOTA.? ?
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Thank you Hans for all your hard work on this project, I enjoy building and learning about your radios just as much as I do operating them.
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73
Roger MW0IDX
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Re: QMX+ Transmitting on 10m but no receive
Okay I think it was my antenna, I haven't even weirder problem now. As soon as I start transmitting after around 3 seconds, the whole qmx just turns off
There is plenty of 10m activity on FT8 right now, at least where I am.? Check your audio card settings.
Stan KC7XE
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Roger Dallimore
Udo Die?elberg DF4BJ
Jason
Michael N6QP
Ken Cone