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QMX+ appears dead after firmware update
5
Hi all, I had just completed the build of my QMX+ today and was very pleased that on first power up it sprang into life and appeared to be all functional. I then saw at power up that the firmware revision was 1.00.27 so I had downloaded the 1.02.000, extracted the file, then connected the unit to the PC. After entering the firmware update the screen went blank as expected and a USB drive appeared on the PC showing the eeprom and the QMX file. I then copied across the new file which appeared to go ok but nothing after that. I waited to see if it would come back after a while but nothing. At this point I disconnected the power and reapplied it, attempted to turn on from the front panel but no response. The unit now appears dead. I built this unit as a 12V version and am running it on a bench PSU set to 11.5V. Before I did the update it was drawing around 130mA. Now, after connecting the power and pressing the power on button, although there is no display the unit is drawing around 180mA but otherwise is dead. Any ideas what could be at fault or what could be checked? Ian
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QMX Alternate Bands
Has anyone tried 80-15? LPF0: 80m LPF1: 40m LPF2: 20m, 17m, 15m BPF0: 80m BPF1: 40m BPF2: 20m BPF3: 17m, 15m 73, Robert VE7ZN
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QMX and WinLink/WARA HF settings
14
Hello! I am trying to find right settings to start work with WinLink and VARA HF threw QMX. CAT connection is OK. The only problem here is that when I choose some Gateway channel QMX always switches to USB mode from DiGi. But it is not a big deal to return back to DiGi manually. The main problem is that when I start connection with the chosen channel QMX shows two dots as TX status. Which means that audio level from PC is too low. But I've put it to maximum. And everything works fine with WSJT-X and JS8Call. So problem is definitely with some WinLink VARA HF settings? Can smb help? Hans, did you try to use WinLink with QMX?
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SDR with the QMX
28
Hello, I am interested in enabling the IQ and displaying the information on my PC. I know it's possible but I have never attempted it. What SDR software should I try (I run both Windows & Linux) Has anyone done this? Please share your experience Is it simply a matter of enabling IQ in the Digi menu and pointing to the sound card from something like SDRPlay? Thanks in advance!
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Based on the large red warning on page 4 of the QMX+ assembly manual it is clear that Hans intended us to power the QMX (and presumably the QMX+) from 9V and tolerates us modifying the rig to operate 12V at our own risk. It is also clear from the discussions I have been able to find that most people opt for a 12V supply (along with various hacks and bodges to actually run it from 13.8 V or more). Given that, for a real world battery I'm going to need a buck/boost converter to get a stable supply that won't kill the rig 9V is just as easy to get as 12V (Assuming I go for a buck/boost converter rather than the three diode bodge) Given that a hardware choice has to be made early on in the build process I'd rather not have to change this at a later point so would like to pick the right option from the start. Has anyone had issues with running either 9V or 12V that might make one a preferred choice over the other? I've seen Druck converters recommended but here in the UK the choice seems to be limited just one buck converter and that needs a 1.5V overhead so would need a fully charged LiFe or Lead Acid battery to exceed the 13.5V I'd need to supply to get a 12V output. If I go for a 3S LiPo battery the voltage range is between 9 and 12.6V (3V-4.2V per cell) making 9V operation or a boost converter essential. There are other devices on eBay that claim to have both buck and boost capability but I have no idea how noisy they'd be.
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Searched but did not find anything - Completed the QMX+ build and was assembling into the case when I found that the front panel PCB will not fit into the case. The case is 96mm inside. The case is 99mm between the grooves The front metal panel is 106mm at the widest point The front PCB is 105mm across. Basically I am trying to squish 105mm into a 96mm opening. Not going to happen. Photos are attached -- Since it is completely built, should I try and Dremel 10mm off the front PCB? TIA Michael, KG5UMH
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Pacific Antenna mic used on new QMX+ not working?
7
I just built the Pacific Antenna electret mic kit to use on my new QMX+ with updated firmware to operate SSB...following the instructions in the QRP-Lab's manual to wire the mic connector, when I key the new mic, it transmits what I believe is a two-tone test signal! So, it keys the rig with RF output but somehow the QMX+ transmits a two-tone signal always...any thoughts what's going on? Thanks and 73 ed
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QMX+ & WSJT-X settings
3
I've been going thru the posts here and have not seen setting for the QMX+ and WSJT-X ? any help would be great
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Inadvertently downgrade to v 100 001
5
I went to finally update the new software but chose the fist alpha version by mistake....v 100 001 .... I can no longer find the upgrade software in the menu settings if the rig with this firmware...thoughts? Scott
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#QMX rev 3 - High Band
2
#qmx
So I finally got around to build my QMX High band after looking at it on a shelf for the last year. I thought thing had gone pretty smoothly and appeared to be so with the initial power on. I built it for 12 vdc, but used a bench power supply set at 8vdc and saw about 170 milliamp draw. I did the firmware upload and then I couldn't get the display to work. There was only 1.6 vdc on the 3rd pin of the side closest to the display. No other pins had voltage. I turned up the voltage on the power supply to 11vdc, but did not see an increase in amperage, in fact it went down to about 70 milliamps. I was even able to use the jumper to re-initialize it and saw the same readings. So I started taking voltage readings around the board. The 2x4 (S302) and saw this Top row (closest to LCD) Pins 1 - 0vdc 2- 10.8vdc 3- 3.2vdc 4- 3.2vdc Bottom row 1-2.9vdc 2- 3.28vdc 3- 3.25vdc 4- 3.25vdc Then I started to poke around some more on the power supply boards, and I believe I must have been a little sloppy taking some voltage readings, because now it won't power on at all. I can see the amperage increase to 10 milliamps when I try to turn it on, but it immediately goes back to zero when I release the encoder. Which makes me think I damaged something in the power hold circuitry, so I suppose I'm buying replacement power supplies, but I'm hesitant because that won't fix the original problem it just gets me back to where I started. Any thoughts or ideas would be appreciated.
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PTT over CAT - WSJT-X vs fldigi
4
#fldigi
#QMXplus
#ssb
#wsjt-x
I just updated to the new SSB firmware on QMX+ Rev. 3 and was hoping to try out MSK144 mode in WSJT-X. (Probably not enough power to be heard by anyone, but still.) I have found the PTT over CAT control to be inconsistent when in USB mode. Usually the first TX works and then the rest briefly trigger then un-trigger PTT. (DIGI mode still works just great.) Looking at the CAT monitor doesn't show anything odd (no early RX; sent) and it's not triggering SWR protection or anything. PTT over CAT in USB mode in fldigi---also using Hamlib, same Kenwood TS-480 config---works fine. As far as I can tell, the only difference is that WSJT-X is sending either 'TX;' or 'TX1;' depending on the configuration; while fldigi is sending 'TX0;' which for some reason is more reliable in convincing the QMX+ to transmit. Is anyone else having this issue? Any suggestions or ways to convince WSJT-X to send 'TX0;' instead? TNX 73 de Tim AF0CQ
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Different modes in Split Operation
2
Is it possible to operate different modes in Split? For example: VFO A (RX): LSB VFO B (TX): CW 73, Robert VE7ZN
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PSK31 with QMX + Digipan
15
Hi all, just some hints how to configure QMX and Digipan. QMX: - SSB Menue: Mic AGC ON; Input: USB; MIC Gain 50; Compression 0 USB Gain: Adjust for 50% power on idle PSK Signal. (I am using USB Gain 5) - VOX: ON - CESSB: ON Make sure your antenna SWR is ok. If "Protection" is on it might stop your TX. (Its not the fault of Digipan, hi) DIGIPAN: Set your Serial port (where QMX is connected), no RTS/DTR as we are using VOX. Soundcard: Type: "Computer soundcard"; Input/ Output: "digital interface QMX"; sample rate: 11025 Thats it. Ready to make first PSK contacts! Good DX and hope to work you in PSK. 73 Mat DF2OF
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50W Amp for QCX
9
I plan to build two QCX+: one 20M band and one 30M band. If I also build a 50W Amp for QCX with the 20M band low pass filter am I right to guess that this 50W Amp will work well in agrrement with the regulations about harmonics with the 20M and 30M QCX+ without any need for other filters? 73 - Pierre - FK8IH
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fldigi with QMX+?
11
Ok ..I have tried fldigi on other radios - always gave up after too much trying to make it work. So trying one last time with QMX+. Is there a simple "HOW- TO" for getting to work ? I want to use it for RTTY mainly . So far no fun...?thanks
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QMX receiver went deaf
22
Last night while playing with my qmx the receiver went deaf. This happened after txing on ssb with IQ mode on and panadapter open. I was using a mic connected to the radio. The S meter with antenna dropped to nearly nothing and I can only hear white noise now. The radio will still put out 5w. I ran my little signal generator into qmx and on receive I hear nothing at -33dbm. At 0dbm (I know quite strong) the signal will get through. Any thoughts? Thank you Ryan KK6DZB
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When Elecraft introduced the KH1 a year ago, I was immediately enthusiastic about the concept. A small and lightweight shortwave radio with an integrated telescopic antenna. This means that, weighing less than 400g, it can be used in any suitable location on shortwave. So I wanted to build something myself. I immediately began my own experiments with telescopic antennas for 7-30 MHz. This confirmed that a counterweight is absolutely necessary. This wire, which is a quarter of the wavelength long, contributes significantly to the radiated energy. So the idea arose to forgo the telescopic antenna and experiment with end-fed wires twice the length. Of course, it makes sense to stretch the wire as high as possible. But I also got respectable reports with EFHW lying on the ground or in bushes. In this place the antenna may detunes itself, so a tuner is necessary, as well as the standard 1:64 transformer (Unun). The tried-and-tested resonance circuit (Fuchs Kreis) performs both tasks. Once the antenna issue was resolved, QRP Labs brought out the QMX. The ideal TRX for my projects, and now even capable of SSB. Now all that was missing was a suitable housing with an integrated battery and a speaker with an amplifier. Then a paddle for CW as a contactless touch key directly on the device. And the QMX Carrot was finished. But it wasn¡¯t that simple, because everything had to be as small and light as possible. It now weighs 340g and measures 15x8.5x3.0 cm. I¡¯m happy with that. 73 Chris https://youtu.be/0kksiWVOtnQ
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#qmx #Firmware release 1_02_000 Mic Test not scrolling?
2
#qmx
#firmware
QMX, running Tabby Terminal on a MAC M1 The mic test shows one bar with mic response showing as dashes . Live response but only the one line. Still works for mic setup but scrolling would be nicer. Have always used the Tabby ( putty for mac and free) for both the QMX and QMX+. What is the sweet spot on the onboard display running now with 2 bars boise ob upper and 5 bars on upper when talking I've been lazy about getting my general so 10M is my playground now. Just as I got SSB working the10 M band has died. the U3 gets the same 2 receivers at 10+ miles away rather than 20 to 40 reports on PSK rptr when things are good. Rain dances etc welcomed!!
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You don't hear it from me
2
Hi Hans won a zBITx from Farhan yesterday at FDIM :) :) :) It was a random giveaway, random number generator picked Hans's number :) :) :) 73 muhsin TA1MHS
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Newbie with battery question
19
Hello All This is my first post to group. Thank you for the invite, I appreciate it. After searching thru some of the files I found myself somewhat confused by all the battery options. My kit building days took place in the 50s thru the 80's with the complete Heathkit SB line along with many other kits. My hands and eyes are not what they used to be. I ordered a prebuilt QMX-12-volt xcver and after perusing the files as to what type of battery and accessories to get, I found myself confused by all the different options. I have an IC 705 which is essentially plug and play. Apparently, that's not the case with the QMX. From what I gather from the group, the Talent Cell 12-volt battery is popular. There are many Bioenno 12-volt batteries available as well. Not sure what AH ratings I should be looking for. It seems the xcvr is very picky as to what you power it with and what accessories you should have along with the battery PD Banks, Buc converters etc. all that I'm not familiar with. Any suggestions you have would be most appreciated and the KISS term would help me a lot. Thank you very much for your help. 73 Jeff WB9DAR
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