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Re: shorted PA on TX, dead SMPSU?
Hi Stan
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Thanks for the pointers.
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I got hold of a current-limiting PSU, and did the tests suggested in the wiki here: /g/QRPLabs/wiki/37128
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on PCB#1:
step 2, I got Vcc = 4.1v (should be 0v)
step 3, I got Vcc = 4.2v (should be 0v), I stopped there
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on PCB#2
step 1, I got Vdd = 0.67v (should be 3-3.3v). I stopped there
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Here's the results with a 8v supply, 100mA current limit, holding down the power switch:
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(on PCB#1)
12v goes to 5.3v?
Vcc goes 0.2v to 2.1v
pwr_on goes 7.4v to 0v
pwr_hold stays at 0v
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(on PCB#2)
12v goes 0v to 5.2v
Vdd goes 0v to 0.1v
lin_reg_en goes 0v to 0.01v
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when I do click the power button, current limits at 100mA every time.
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Hope this is useful
Cheers
Dan
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Re: SOTA QMX SSB
Roger great to hear its working! Thanks for sharing. Your picture got me curious - what antenna are you using with the tuner and Elecraft balun? 73 KD2WQI On Fri, Mar 21, 2025 at 1:06?PM Roger Dallimore via <mw0idx=[email protected]> wrote:
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Re: com port conflict
About the best option for sharing physical COMM ports is using TCP/IP.??
?? > Something like SoCAT can be used and is available on may operating systems, but that would require a lot of manual configuring.
?? > I believe FLRig is available on most operating systems, and is a good option for doing this.
????? WSJT-X has a radio option for it, and most logging programs will also connect to it.
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There is also a hardware option - create your own 1-wire (plus ground) serial BUS. And connect to multiple physical computer ports.
?? Just mimic the Icom CI-V connections, which requires several 2N2222 (2 at each device).
?? Icom uses addresses, but the reality is that every device connected, will receive the data, and any device can send.
?? Addressing, just makes sure the right device acts on it, but in your case, it would work.
?? I won't go into any more detail here, since this really is more effort than value (in my opinion), but mentioned as an option.
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Robert Giuliano KB8RCO |
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Re: Available Hand Mics for QMX SSB ?
Got your order, Glen. Also sent you a private message John.
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My bubble mailers didn't show up Saturday like they were supposed to, Amazon is telling me they should show up by Tuesday, so it looks like I should start shipping these out by Wednesday.
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Thanks for the great response guys. I have been having fun printing, putting together, and testing? microphones all weekend. I will order more parts as needed to fulfill orders, just trying to make it so as many of us as possible can enjoy this awesome mic that K6ARK designed the 3d print for.
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My email is good in QRZ.com for anyone interested in getting one of these, send me an email and I will send you payment details.
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Erik |
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Re: Software Development and Requirements Creep
Either way would have been fine.
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Releasing SSB firmware for 80m only, no CESS, limited menu, no support for CW or digital modes,
no calibration step would have shut down the "This EER SSB Stuff Can't Possibly Work" posts.
And many here would have been happy to try out an early version of 80m SSB.
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Pushing through and releasing it in more or less final form may be for the best, assuming Hans recovers.
It's mostly bug reports being reported, often stuff Hans wasn't aware of, not reports of needed additional functionality.
It would have taken months for Hans to find those bugs, releasing piecemeal would likely have a larger total bug count,
more documentation to write, more discussion in the forum.. All at once makes best use of his time.
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I'm just happy it's out, and that it mostly works.
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Jerry, KE7ER
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On Sun, Mar 23, 2025 at 02:55 AM, Chris wrote:
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Hans:
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I tried changing the 80/20 band swap advanced setting and it didn't fix the problem, but it changed the behavior a lot. It now runs longer before quitting.
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In another thread, others with this problem are suggesting that the configured center frequency in the band table might have something to do with the problem. I believe that's used as the frequency to run the tests.
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I'm thinking I may have to improve the BPF center frequencies to fix the problem.
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M |
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Re: Odd 20 meter calibration
My version 1 PCB installed an earlier band table with the band centers on the FT8 Frequencies. I'm having this sort of trouble on 80 and 40 meters.
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I think there may be a problem if the test frequency is too far down the slope of the BPF curve resulting in low signal feedback for the tests. I've mentioned it to Hans and he told me to try changing the 80/20 band swap, but I haven't quite figured out what he meant yet. ?My BPF filters are skewed quite a bit on some bands (but the manual indicated this was nothing to worry about at the time).
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I'll try to figure that out, but I'll also try moving the band centers and see what that changes in the calibration test.
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Re: FT8 in USB mode - not working right?
¿ªÔÆÌåÓý
At first I tried clicking the "Update hamlib" button in WSJTX. This did not fix the issue. So I copied over the latest manually. WSJTX will now allow me to select the QMX.?
Tony
AD0VC
From: [email protected] <[email protected]> on behalf of Richard Dyer via groups.io <rdyer39@...>
Sent: Sunday, March 23, 2025 8:05 AM To: [email protected] <[email protected]> Subject: Re: [QRPLabs] FT8 in USB mode - not working right? ?
Hamlib 4.6.2 or better if you want QMX support. Hamlib. 4.6.1 is BROKEN!?
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Re: Software Development and Requirements Creep
Well said John. I agree with you. Mike Krieger On Sun, Mar 23, 2025 at 7:34?AM John Olsavicky via <kc3pby=[email protected]> wrote:
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Re: Simulation of #QMX Filters + planned 6m in QMX
#qmx
Peter,?
Good idea! I think you have a winning idea.?
Altho the 60-15 m version is the sweet spot for me.?
--
73, Dan? NM3A |
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Re: FT8 in USB mode - not working right?
¿ªÔÆÌåÓý
The advantage of USB mode over DIGI mode is the ability to control the power level. DIGI is my preferred mode but there are times when reduced power is useful.
Tony
AD0VC
From: [email protected] <[email protected]> on behalf of Stan Dye via groups.io <standye@...>
Sent: Sunday, March 23, 2025 12:41 AM To: [email protected] <[email protected]> Subject: Re: [QRPLabs] FT8 in USB mode - not working right? ?
I have also duplicated the problem in running FT8 in USB mode in WSJT-X.
After the first transmission of the automatic exchange, it won't transmit again.
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My first note: FT8/FT4 will always work better in digi mode, so why are we trying this??
So a fix may be low priority, unless this also affects other WSJT-X modes that need SSB mode.
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Anyway, I tried to diagnose it a bit, changing settings and VFOs used, etc.? I tried what I think is the least complicated settings, for radio control, i.e. setting both 'Mode' and 'Split Operation' to 'None', and setting mode manually and selecting VFO
A.? But the problem persists.? I turned on the QMX CAT log, and observed the commands sent to QMX, and I see the correct commands being issued, but on the 2nd cycle when the TX command is sent, for some reason QMX immediately reverts to RX mode (per its log).
This same action happens on successive cycles.? I have no idea why.
See annotated log excerpt below:
01:17:26 IF; IF00007074000 ? ? +00000000002000000 ; [This is from polling which I have set to 60sec] 01:17:26 FA; FA00007074000; ? ? ? ? ? ? ? ? ? ?? ?? [This is from polling which I have set to 60sec] 01:17:26 MD; MD2; ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ?? [This is from polling which I have set to 60sec] 01:18:19 TX;??????????????????????????????????????? [Start of 1st TX cycle] 01:18:19 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:18:19 TX ? ? ? ? ? ? ? ? ? ? ? ? ??????????????? [QMX internal log msg noting change to TX?] 01:18:26 IF; IF00007074000 ? ? +00000000012000000 ; [next Poll] 01:18:26 FA; FA00007074000;???????????????????????? [ "" ] 01:18:27 MD; MD2;?????????????????????????????????? [ "" ] 01:18:33 RX;??????????????????????????????????????? [to RX -> end of 1st 13 sec TX cycle] 01:18:33 RX???????????????????????????????????????? [QMX notes change to RX?] 01:18:50 TX;??????????????????????????????????????? [Start of 2nd TX cycle] 01:18:50 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:18:50 TX ??????????????????????????????????????? [QMX notes change to TX?] 01:18:50 RX ??????????????????????????????????????? [QMX immediately shows change to RX! Why?] 01:19:03 RX;??????????????????????????????????????? [to RX -> end of 2nd 13 sec TX cycle] 01:19:20 TX;??????????????????????????????????????? [Start of 3rd TX cycle] 01:19:20 ID; ID020;???????????????????????????????? [it likes to send an ID cmd after TX] 01:19:20 TX ??????????????????????????????????????? [QMX notes change to TX?] 01:19:20 RX ??????????????????????????????????????? [QMX immediately shows change to RX! Why?] 01:19:26 IF; IF00007074000 ? ? +00000000002000000 ; [next Poll] 01:19:26 FA; FA00007074000;???????????????????????? [ "" ] 01:19:27 MD; MD2;?????????????????????????????????? [ "" ] 01:19:33 RX; ?????????????????????????????????????? [to RX -> end of 3rd 13 sec TX cycle] 01:19:39 RX; ?
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Glen Jenkins WB4KTF
Richard Dyer
Donald S Brant Jr
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