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GPS module GY-GPSV3-NEO wont change baud!
3
HELP! I need to change my QRP Labs GY-GPSV3-NEO module, which has the UBlox NEO-7M-000 chip on it to 4800 baud, the old NMEA 0183 standard for the TinyTraker3 APRS units. I can use the UBlox u-center25.03 and everything I receive and send from it appears to work, telling me that the RS232/TTL interfaces that I try are correct. However, going into Messages View - UBX - CFG - PRT - TragetUART1 (or any other) setting BAUDRATE to 4800 and hitting the Send button makes NO CHANGE (EVER). It stays at 9600 Baud! Is there another way to try this and make the change permanent? Perhaps there is an inhibit connection on the chip? Or some sort of authorization command? Connecting a terminal program gives me the continuous GPS strings so the module is correctly putting out my location etc., so that part is also working fine (at 9600). I appear to be stumped! Miniature GPS units running at 4800 Baud are pretty rare and I want to resurrect my Altoids Box Pocket Tracker with one to make it truly pocket size, again. Thanks for any advice or help. 73 - Mike VE3EQP .....>
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QMX+ loose some characters while sending stored messages
5
#qmx
#QMXp
#QMXplus
#troubleshooting
hi, may i`m wrong with some qmx+ config, but sending cw from stored messages isn?t possible without loosing some characters, as like as "cq de df4bj" may ends in "ca de dfuba" or something else. Same behavior if sending from logging programm via cat. Did i don`t have correct configs or is that an known issue? I have installed the v1_01_003, updated from 1_00_027 on QMX+ Rev 3 , but going back to a non ssb fw doesn`t help. any suggestions ? vy 72/73 de Udo DF4BJ /qrp
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What do people do for building or sourcing custom inline fused power cables?
8
#parts
#power
#supply
#12v
Hi all, I'm a new ham trying to build a power supply cable like this for my QDX or QMX+ to use my existing battery in the field: 12.8V LiFePO4 battery > 18AWG cable w/ ring terminals > inline home-brew buck converter > 18AWG cable > fuse (1.5A?) > 18AWG cable > 2.1mm barrel connector The part in bold is what I'm having trouble finding an obvious solution for. Is there a way hams typically build such fused cables without a whole lot of extra splicing? I feel like I'm missing something because I don't see much discussion about this or any pre-made assemblies like that. Sources for such an assembly would also be appreciated. I saw this thread but ordering from UK to US and cutting off the Powerpoles isn't a good option. /g/QRPLabs/topic/95334671#msg95573 Here's some background discussion on the buck converter build we're doing if anyone's interested in that. Thanks, Mike
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QMX+ with 100 amp/hour lithium iron battery
19
Just about to finish my QMX+ build and I have a voltage question. The kit was built for 12 volts. I have a 100 amp/hour lithium iron battery for vhf base station emmcom backup. At full charge, its just north of 14 volts. Would it be wise to install a buck converter in the battery box to limit voltage out to 12 volts for the QMX+? Thanks in advance - I really don't want to fry this little gem. -- Jim, W7EZN 73!
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Winlink and VARA HF setup for QMX
4
I would be grateful if smb can explain in detail what I need to do send e-mails threw QMX. I have no experience with Winlink and limited experience with FT8 data transfer. I have tablet PC (Win 8) with VARA HF and Winlink Express installed and I have QMX. What I need to do to set all these properly?
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My QMX+ (Rev.3, 12V, FW 003) complains about low voltage at the finals. See picture: 9.7-9.8V in red. I checked the voltages at C506 and C529 and they show the expected divider ratio of ~5.7:1. But the actual voltage at C506 is ~11V (12V regulated power supply). May be this is one of the reasons for the SSB calibration problems? Gottfried oe1ira
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QMX+ Firmware laden
7
cq Nun habe ich den QMX schon einige Tage. Bisher ist es mir nicht gelungen, die Firmware zu laden. Im Detail: Der QMX soll auf einem Mini-PC ZOTAC für Portable Eins?tze installiert werden System: Win7 32Bit. Der QRP-Labs QMX-Transceiver wird im Ger?te-Manager mit Fehlercode 28 und als COM1. erkannt, erscheint aber nicht als Wechseldatentr?ger im Explorer Code 28: Treiber fehlt! Nun habe ich die QMX Installation auf dem Desktop Win10/64 versucht. Der QRP-Labs QMX wird als ?Serielles USB-Ger?t“ mit COM3 und bei ?Audio“ als QMX-Transceiver im Ger?te-Manager erkannt, erscheint aber nicht als Wechseldatentr?ger im Explorer : Was kann ich tun, um die Firmware zu laden? =================================================================================================================== Google ?bersetzung: cq I've had the QMX for a few days now. So far, I haven't been able to load the firmware. In detail: The QMX is to be installed on a ZOTAC mini-PC for portable use. System: Win7 32-bit. The QRP-Labs QMX transceiver is recognized in the Device Manager with error code 28 and as COM1. but it doesn't appear as a removable drive in Explorer. Code 28: Driver missing! Now I've tried installing the QMX on the Win10/64 desktop. The QRP-Labs QMX is recognized as a "Serial USB Device" with COM3 and under "Audio" as a QMX transceiver in the Device Manager, but it doesn't appear as a removable drive in Explorer. What can I do to load the firmware?
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QMX+ microphone ideas
3
I recently purchased this microphone kit from Pacific Antennas https://www.qrpkits.com/microphone.html for $15. The kit was easy to build and seems to work ok with the QMX+ usng a MIC Gain set at 50. Anyway I made my first SSB contact today on 10m so I'm satisfied. I've enjoyed reading about what others are trying and look forward experimenting some more. Les, N1SV
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Wouldn't it be loverly if the next version of the QMX had a display like the zBitx. Hans has done some amazing work with the QMX, with SSB and with bringing us some absolutely amazingly good quality radios and kits that definitely punch above their weight class. Thanks for everything you've done Hans. Can't wait to see what comes out of the QRP-Labs stable next.
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SORRY, Life got in the way. I had to change the time. It is now 15:00 EDT / 19:00 UTC Ed AB8DF On 4/9/2025 11:39 AM, AB8DF Ed Kwik via groups.io wrote: On 4/08/25 I had a CW practice / rag chew session on 30 meters. I worked three stations: Date / Time Call Bnd Frequency Mode Power Rec Snt Name SPC# Comments Off 4/8/2025 14:14 W9TO 30 10.111 CW 50 559 559 Tom OH K3 at 50 watts 100 ft sloper doublet 14:28 4/8/2025 13:44 KC9HEK 30 10.112 CW 60 599 569 Brian NY K3 at 60 watts 100 ft sloper doublet 14:04 4/8/2025 12:54 NM1I 30 10.109 CW 50 579 559 Butch MA K3 at 50 watts 100 ft sloper doublet 13:37 Conditions were OK. 30 meters seemed to be better than what I have been experiencing on 20 . SSN = 167, SFI = 162, A = 13, K = 2. My next CW practice session will be April 11 at 09:00 EDT / 13:00 UTC on 30 meters. Anyone and everyone is welcome. This practice is intended for operators who are new to CW or they need some practice. IT DOES NOT MATTER HOW POOR YOUR CW IS. Mistakes are OK. Poor fists are OK. Slow speed is OK. Really slow speed is OK. This practice is meant for you to improve your CW. I will do my best to adjust to your skill level. Operate at any power level. If several stations show up, I will operate as a round-table control station. I will do it as a round-table so everyone gets a chance to transmit. Please listen to my directions. Details: Date - April 11 2025 Time - 09:00 EDT 13:00 UTC Band - 30 Meters How to find me - I will find a clear frequency and call CQ. Go to the Reverse Beacon Network and search for my call sign AB8DF. That will tell you what frequency I am on. Tune your station to that frequency and if you hear me give me a call. If there is a QSO in progress, please wait for a break in the action. Then send your callsign. If I hear you, I will invite you to join the QSO and start a round-table QSO. Reply to this email if you have questions. IT DOES NOT MATTER HOW POOR CW IS Ed AB8DF
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QRP Labs FDIM/Hamvention
Will QRP Labs be seller the QMX+ kit at FDIM and Hamvention? Looking to acquire the following: QMX+ 160-6m, 5W multi-mode transceiver Assembled or Kit: Kit Optional Enclosure: Including enclosure Add kits: QLG3 GPS/GNSS Receiver Add kits: 2.1mm power plug Joe N7QPP
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CW Filters
21
I just upgraded to the 027 firmware on my QMX, from 018. Being able to select the CW filter is very nice, but I don't understand how to enable cascading or compounding of two CW filters. The manual says there are two CW filters - 300 and 500 Hz, yet the submenu shows 8 filters, ranging from 50 Hz to 500 Hz. Thanks and 73, Steve, N2IC
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QMX+ no power output, low SMPS bias current
19
I finished assembling my QMX+ (including a battery mod) and finally got the chance to test it. In the diagnostics everything appears to check out, until I press P. At that point the SMPS bias current for every band is ~4.6mA (where the PIN forward bias is 30mA). If I press T (while connected to a dummy load), the RF output and the Transmitter Voltage turn RED, with the Voltage reporting ~9.5-10.0V. Power is consistently listed as 0.0W, and the SWR (into the 50 Ohm dummy load) is all over the map. Any ideas what I did wrong? I've looked at all of my soldering connections multiple times and don't see any bad joints or bridges. I've checked everywhere I can think of for continuity, and everything has checked out so far.
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Winding toroids
I'm old... On Friday, April 11, 2025 at 03:34:41 PM EDT, Karl via groups.io <karlshumaker@...> wrote: So, what is your problem? Har, har! https://www.facebook.com/share/r/164oFDnJr6/ -- 73 Karl KI4ZUQ
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QMX+ PC software?
4
Other than WSJT-x, what do folks use for waterfall display and CAT control under Windows? -- Brent DeWitt, AB1LF Milford, MA
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QMX+ with ~1000 tone on 12M & 6M
43
The radio is a Ver. 1 QMX plus that in general performs exactly like I expect. It does not have the GPS option installed, and there is no battery in the clock battery slot. The radio is used for CW only. As the title suggests, I have an approximate 1000 tone on only 12M and 6M bands. It is internal, in that I can remove antenna and it's still there. It does not change in level or tone while tuning around the band. It appears to de-sense the receiver a bit, as a signal must be pretty strong for me to be able to copy it on 12M. There is normally a 'beat' frequency between the received signal and the tone when I can copy someone. I have run the I/Q sweeps in Putty, using a raspberry pi computer. The tone is present with or without the computer attached. The I/Q sweeps look very nice on the lower bands, and begin to deteriorate as the frequency goes up. They are still showing the two sine waves, but are a bit distorted( not a perfect line of x's ). This deterioration is also noted on 10M and 15M ( to some extent ) and the sweeps for 12M and 6M are not suspiciously worse than others. 10M works flawlessly, as do the other bands. The remaining filter sweeps look good, with some tweaking needed possibly, but totally functional as is. I have a set of QMX HB and LB radios to compare symptoms, and the HB QMX does not have the 'tone' on 12M when swapped into the system. I am curious what path to take troubleshooting this issue. I did not find anything in the archives that addressed this strange behavior. Thanks & 73 Dick W4PID
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Just finished my QMX+ and really enjoyed the build. Built a QDX a couple of years ago and it has been great. Powered up at 9 volts and no smoke! Draws about 100 ma and audio out can be controlled and tune appears to work and mode / band does something. Connecting an antenna increases the noise so it appears the receiver is working. But nothing appears on the display except for the backlight. Turned the pot from stop to stop with no results. I’m going to touch up all 16 of the display header pins. What a bad place for a soon to be 83 year old duffer to be soldering. Why couldn’t that bave been added to the display board before mounting? Any other thots? 72/73 Jim w0nkn
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On 4/11/25 I had a CW practice / rag chew session on 30 meters. I worked five stations: Date / TimeCallBndFrequencyModePowerRecSntSPC#NameCommentsOff4/11/2025 14:35AB2EW3010.108CW100579559NYSteveK3 at 100 watts 100 ft sloper doublet15:044/11/2025 14:17VE3UXJ3010.108CW100569559CanadaCraigK3 at 100 watts 100 ft sloper doublet14:224/11/2025 13:26W4SYV3010.108CW100579449FLRichK3 at 100 watts 100 ft sloper doublet14:054/11/2025 13:11K1PUG3010.108CW100559449CTHankK3 at 100 watts 100 ft sloper doublet13:224/11/2025 12:59WB4DKF3010.108CW100349229FLDickK3 at 100 watts 100 ft sloper doublet13:09 Conditions were OK. SSN = 112, SFI = 153, A = 17, K = 2. My next CW practice session will be April 12 at 20:00 EDT / 00:00 UTC on 30 meters. Anyone and everyone is welcome. This practice is intended for operators who are new to CW or they need some practice. IT DOES NOT MATTER HOW POOR YOUR CW IS. Mistakes are OK. Poor fists are OK. Slow speed is OK. Really slow speed is OK. This practice is meant for you to improve your CW. I will do my best to adjust to your skill level. Operate at any power level. If several stations show up, I will operate as a round-table control station. I will do it as a round-table so everyone gets a chance to transmit. Please listen to my directions. Details: Date - April 12 2025 Time - 20:00 EDT 00:00 UTC Band - 30 Meters How to find me - I will find a clear frequency and call CQ. Go to the Reverse Beacon Network and search for my call sign AB8DF. That will tell you what frequency I am on. Tune your station to that frequency and if you hear me give me a call. If there is a QSO in progress, please wait for a break in the action. Then send your callsign. If I hear you, I will invite you to join the QSO and start a round-table QSO. Reply to this email if you have questions. IT DOES NOT MATTER HOW POOR CW IS Ed AB8DF _._,_._,_
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Hi, I've just finished my QMX+ rev.3 (firmware 1_00_027). Everything seems to be working correctly, except for the SWR and PWR does not show. They don't appear on the LCD, even though I have them enabled ON in the setup. The LCD display is working properly, showing the battery icon and clock, frequency, etc. Any advice would be welcome Thank you so much! 73 Miguel
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QMX display unususal problem
8
#qmx
#dispay
Hi All, My mid band QMX Rev.2 developed display problem after 4-5 months of good working. Firmware 1_000_027 I build 12V version. After switching on all seems ok and works, but after 20-30sec display becomes corrupted. Initially it is just a few letters but soon after that all text is corrupted and gibberish. When I switch off and on top row is just black boxes. If I leave radio switched off and detached from battery for day or so and switch it on problem repeats itself again. I mean first it works and then display problems start. I done this couple of times now and each time Initially it works and then after display stops to play a game. Connecting to computer through USB works and all diagnostics and LPF/SWR/etc... tests do not show anything unusual. Any ideas what's going on? I am not that knowledgeable to sort it out myself. Can you direct me what else I should check? --------------------------------- 73 de Marek SP9TKW
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Image Name
Sat 8:39am
Sat 8:39am