Re: QDX won't load firmware...?
File name is "manual_operation_1_05a.pdf".
I'll be curious to see what you find!
73
Paul
On 7/19/23 20:41, Leigh KG7WED wrote:
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On Wed, Jul 19, 2023 at 02:50 PM, Paul - AI7JR wrote:
BTW, on page 45 of the assembly manual, in the lower
right-hand corner I think is the 5 pin connector you refer to...
Depending on how you count it, pin "3" could have all sorts of
interesting effects on the MPU... :-)
I'm curious to see this, but there are multiple versions of the
assembly manual, and I'm not finding it... which version were you
looking at?
And thanks for the other ideas, I'll look into those too. I think
I did run those commands to stop the ModemManager, but I should
double-check that, and see if there's anything else hijacking the
serial port.
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Re: Birthday season at QRP Labs HQ
You, sir, are quite diplomatic! Good show! 73 Tom W4OKW
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Re: Obsessive QMX tracking
Lunch with Fried Green Tomatoes (Irondale Cafe) and then a QRP-Labs rig?!? I love it.?
Lee KX4TT
On Thursday, July 20, 2023 at 01:24:12 PM EDT, August Treubig AG5AT <atreubig@...> wrote:
Out for delivery this morning after a trip from Newark to Memphis to Irondale, Al (Birmingham suburb). ?
There are probably many others out for delivery all over US ham land.
Aug
AG5AT
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Re: QCX Birthday - 20,000 sales coming up!
>?I have no plans to retire the QCX-series despite the hi-tech QMX.?
Very glad to hear that!. I just finished my first QCX+ build and I absolutely love it!
I will be ordering more.
Fantastic design Hans!
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Re: Birthday season at QRP Labs HQ
Hans, being the ever efficient designer, even slopes his roof to fit his staff. Hi hi.
--
Colin - K6JTH?
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Re: Birthday season at QRP Labs HQ
Aaaarg!? So sorry Hans.? I was joking.? But I do agree, in these days someone might really say that seriously!? Anyway happy birthday to all the birthday people and sorry for taking up your time, making you write all that long response!
Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14
On Thursday, July 20, 2023 at 12:32:09 PM EDT, Hans Summers <hans.summers@...> wrote:
Barry:?
> Are you really tall or are all your ladies short?
I really am tall. 1.96m (or 6'5" if you prefer Imperial).?
Steve:
> Great looking crew Hans!? I assume they are all women? > due to the increased hand eye coordination of that sex? > over males.? Or is it because they know how to bake the? > cakes?
We might be on shaky political correctness grounds but I hate PC and in any case I think you may have already crossed that line.?
Well... long answer... at least one of them is my XYL because well, I'm that way inclined ;-)? And one more is my daughter (the smallest of them, as she is only 9) again presumably because I'm that way inclined. The two boys are my sons, including the LFB (Little Fat Baby) now 3 years old, who is blowing out the candles in one photo not because it is his birthday (it was a few weeks ago), but just because he likes blowing out birthday candles.?
As for the other 7... well one is the XYL's second cousin temporarily borrowed to assist during summer holidays, in these times of high QMX demand; the other 6 happen to be all ladies just because that's the way it turned out... however there ARE local, cultural and demographic reasons why there is a higher probability for females to get this job than males. If I might put it simply and carefully: in some ways this rural area in SW Turkey is still a simpler and perhaps more traditional society than one might find in more urban centers or in UK or US for example.?
I don't know how else to put it other than that a man goes out and works, a woman Mothers children; where there is a financial need, a woman also works, but the types of jobs are different. Because fundamentally men and women ARE physically different, and often have different preferences on schedules and type of work.?
I know it isn't a popular view in 2023 but I have to be a realist, sorry. It's not being offensive, it's just practicality. I don't like or dislike men or women differently, nor prefer one over the other, nor think that one is better than another; neither could I consider it reasonable to say that they are identical in every possible way.?
In this area there is tourism during the summer; it often involves very long hours and no days off (7 days a week work) during tourist season which is 5 months a year. The other months there is work in industries such as agriculture or construction. In all cases these jobs (summer or winter) are more likely to attract males; a Mother often prefers a steady job which is 5-days a week, 8:30-6, she can spend evenings and weekends at home with her children and on cooking and housework. When not at school, extended families and neighbours can help with child supervision where needed. Tourism and construction may be more lucrative when available, but are not so attractive to women as to men here.?
We have not, and do not, tried/try to recruit women rather than men. Personally I really couldn't care less whether we employ male or female; young or old; I just wanna get the kits shipped out and the?assembly line on assembled?radios flowing.?But when we have a vacancy, due to the nature of the work and the schedule, we find that we normally get more female applicants than males; we have also experienced a higher turnover of male employees than female ones. Ladies on average are well suited to this work which requires detailed attention and patience, which are less likely to be found in men.?
All factors which have tended to mean that we end up with more ladies than men; nor how old they are; historically it hasn't been exclusively 100% ladies. But you can perhaps understand now how the probabilities and tendencies go, and it just so happens that right at this moment, they are all ladies.?
So I should put on my asbestos flameproof suit now for the SECOND time in as many days.?
73 Hans G0UPL
Great looking crew Hans!? I assume they are all women due to the increased hand eye coordination of that sex over males.? Or is it because they know how to bake the cakes?
Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14
On Thursday, July 20, 2023 at 09:08:25 AM EDT, Hans Summers < hans.summers@...> wrote:
Last Friday we had two birthday cakes and one today... for some reason a lot of team-QRP Labs birthdays all come at once! A lot of cakes involved.? 73 Hans G0UPL
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Re: Obsessive QMX tracking
Out for delivery this morning after a trip from Newark to Memphis to Irondale, Al (Birmingham suburb). ?
There are probably many others out for delivery all over US ham land.
Aug
AG5AT
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Re: Build tips for QMX, QDX and QCX rigs
I love it, thank you. I do most of those things but I still have issues with getting good readings. I was hoping you could expand on item #10. What tools are you using to probe small leads. I have, three times now, been using my ohm meter and had the probes in the exact right place to only have one slip as looked to the screen and requiring a compo9nent replacement. Fortunately, so far, they have been easy components to replace.
--
Colin - K6JTH?
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Re: QCX+ R50, R48 question
Thanks Ron....gonna change it now
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Great advice, thank you Jeffery!
Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14
On Thursday, July 20, 2023 at 11:46:15 AM EDT, Group Notification < [email protected]> wrote:
Jeffrey W Moore <jeffreymoore@...> added folder /Assembly tips for QMX, QDX and QCX
The following files and folders have been uploaded to the Files area of the [email protected] group.
By: Jeffrey W Moore <jeffreymoore@...>
Description:
Tips for QMX, QDX and QCX assembly
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Re: QCX Birthday - 20,000 sales coming up!
Amazing little radios. Well done.
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On Jul 20, 2023, at 7:43 AM, mike/w1mt <w1mt.qrp@...> wrote:
?Congratulations and we¡¯ll done! That is quite an achievement and they are engineering marvels.
-Mike/w1mt
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Re: Birthday season at QRP Labs HQ
Hans,
I like the view of all that smiles of the HQ staff. Could you send me please some cake? Oh, I see, nothing left.
73 Bojan S53DZ
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Done!... just finished building and calibrating.. bottom line? have already made several QSO's, getting 5w out with 12.5vdc supply. I powered it up yesterday and tested it right in the middle of a contest!. Great time to check out the receiver with all the big signals on the band. Very impressive opposite sideband rejection!. Honestly, I wasn't expecting performance like this but was very pleasantly surprised. A few observations.... If hadn't watched this video, I would have had a much harder time performing the alignment procedure and tweaking the LPF for maximum output. My worries about correctly winding T1 were for naught. Got the peak just where it should be. As Hans mentions in the video, the 20 meter version rarely needs changes. This verbal explanation in the alignment section of the manual at first had me like a deer in the headlights....? "It is very important to understand the number at the top right of the LCD, here shown as 09. This is
an amplitude scaling factor, expressed as a power of 2. In this example, the actual amplitude is
divided by a factor of 512 (2 to the power of 9) then displayed on the screen. In this photograph,
27 little vertical bars are shown, which means the actual measured amplitude value is 13,824."
.... and again, after watching the video, the lightbulb went on and I figured out that the numbers in the upper right corner
represented different ranges of amplitude... oh yea, I get it... (grin)
I ended up removing 3 turns on L3 and moving the turns around to get max output. Just squeezing turns together a little on L1 and L2 and there? it was, 5 watts out. Didn't have to touch L4.
I guess the only real "Issue" i had was fitting the front panel PCB to the optional enclosure. The "black 20mm M3 screws" that hold the LCD module to the PCB are too big for the holes on the LCD module. they will not just slide through. You have to actually force thread them through. I could have enlarged the holes in the LCD module slightly but I was afraid of damaging the multilayer LCD PCB. One more point... It would be WAY easier if you used non-threaded spacers between the PCB and LCD module and only used threaded nuts on the back of the PCB. I was having such a hard time getting everything tied down because of those threaded spacers, I ended up using some nylon, hollow, non-threaded standoffs that I happen to have and that did the trick.
Not a complaint really, but I was disappointed in the AGC module.... Setup as suggested, setting the pot so it barely cuts down the background noise, it still let somewhat bigger signals come blasting through. Since this is an audio AGC, I was thinking there must be a better audio limiter/compressor circuit that can be implemented here. There isn't enough gain reduction when bigger signals hit.
Let me say, in the end, I absolutely love this radio!. in fact I'm ready to order the 40m and 30m versions.
An incredible design, Hans is a genius. If you take your time with the build, pay attention to details, you will end up with a box of fun!
Glenn W2BX
?
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Re: QCX+ R50, R48 question
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My QCX+ is the latest rev, 4? Just finished the build. I'll post comments on my thread "my QCX+ build" later today...
Yes, I noticed when I powered up, the LED backlight that you can see on the side of the display was extremely bright, I'll change r48 and see how it looks... is that just R48? not also R50?
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Re: Build tips for QMX, QDX and QCX rigs
Thanks JM.? I saved the file.? After building about 10 QRP Labs kits I learned the hard way nearly everything you just wrote about!
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Re: Birthday season at QRP Labs HQ
Barry:?
> Are you really tall or are all your ladies short?
I really am tall. 1.96m (or 6'5" if you prefer Imperial).?
Steve:
> Great looking crew Hans!? I assume they are all women? > due to the increased hand eye coordination of that sex? > over males.? Or is it because they know how to bake the? > cakes?
We might be on shaky political correctness grounds but I hate PC and in any case I think you may have already crossed that line.?
Well... long answer... at least one of them is my XYL because well, I'm that way inclined ;-)? And one more is my daughter (the smallest of them, as she is only 9) again presumably because I'm that way inclined. The two boys are my sons, including the LFB (Little Fat Baby) now 3 years old, who is blowing out the candles in one photo not because it is his birthday (it was a few weeks ago), but just because he likes blowing out birthday candles.?
As for the other 7... well one is the XYL's second cousin temporarily borrowed to assist during summer holidays, in these times of high QMX demand; the other 6 happen to be all ladies just because that's the way it turned out... however there ARE local, cultural and demographic reasons why there is a higher probability for females to get this job than males. If I might put it simply and carefully: in some ways this rural area in SW Turkey is still a simpler and perhaps more traditional society than one might find in more urban centers or in UK or US for example.?
I don't know how else to put it other than that a man goes out and works, a woman Mothers children; where there is a financial need, a woman also works, but the types of jobs are different. Because fundamentally men and women ARE physically different, and often have different preferences on schedules and type of work.?
I know it isn't a popular view in 2023 but I have to be a realist, sorry. It's not being offensive, it's just practicality. I don't like or dislike men or women differently, nor prefer one over the other, nor think that one is better than another; neither could I consider it reasonable to say that they are identical in every possible way.?
In this area there is tourism during the summer; it often involves very long hours and no days off (7 days a week work) during tourist season which is 5 months a year. The other months there is work in industries such as agriculture or construction. In all cases these jobs (summer or winter) are more likely to attract males; a Mother often prefers a steady job which is 5-days a week, 8:30-6, she can spend evenings and weekends at home with her children and on cooking and housework. When not at school, extended families and neighbours can help with child supervision where needed. Tourism and construction may be more lucrative when available, but are not so attractive to women as to men here.?
We have not, and do not, tried/try to recruit women rather than men. Personally I really couldn't care less whether we employ male or female; young or old; I just wanna get the kits shipped out and the?assembly line on assembled?radios flowing.?But when we have a vacancy, due to the nature of the work and the schedule, we find that we normally get more female applicants than males; we have also experienced a higher turnover of male employees than female ones. Ladies on average are well suited to this work which requires detailed attention and patience, which are less likely to be found in men.?
All factors which have tended to mean that we end up with more ladies than men; nor how old they are; historically it hasn't been exclusively 100% ladies. But you can perhaps understand now how the probabilities and tendencies go, and it just so happens that right at this moment, they are all ladies.?
So I should put on my asbestos flameproof suit now for the SECOND time in as many days.?
73 Hans G0UPL
Great looking crew Hans!? I assume they are all women due to the increased hand eye coordination of that sex over males.? Or is it because they know how to bake the cakes?
Glory to God in the highest, and on earth peace, good will toward men. Luke 2:14
On Thursday, July 20, 2023 at 09:08:25 AM EDT, Hans Summers < hans.summers@...> wrote:
Last Friday we had two birthday cakes and one today... for some reason a lot of team-QRP Labs birthdays all come at once! A lot of cakes involved.? 73 Hans G0UPL
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Tnx QSO, W3WKD.
72,
Bill, N4QA
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Re: #qdx firmware 1_10 release
#qdx
Thanks for your reply Linas,
however, this method does not use the new feature of ¡®custom USB name¡¯, which I was trying to do.
73 Ken g4apb
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Re: Software for Hobby RF Design?
I use LTSpice for "low frequency" (below 100 MHz) work with filters and simple linear designs.? The standard models for capacitors and resistors are quite accurate enough, especially if you are building using surface mount components (which have virtually zero lead inductance -- no leads!) and modern surface mount multilayer ceramic capacitors have very low series inductance and resistance.
Inductors are a bit tougher, but if you can find manufacturers Spice models (Coilcraft has these) the sim results can be quite accurate.? Accuracy is still fairly good even if you just use the published values for "Q", series resistance, and self-resonant frequency and plug those into the Spice inductor parameters.? Toroids are a bit trickier since the published values for the parameters are harder to come by, and Ferrite cores are actually pretty complex.? Iron powder cores are more predictable.
The LTSpice "Monte Carlo" process lets me assign tolerances to my filter components so I can see how the filters are likely behave under real-world component variations.? I usually start a filter design using one of my familiar favorites, reference material, ELSIE, or on-line filter design tools, then play with the filter using LTSpice.? I do try to make my filters as parameter-tolerant as practical, avoiding the need for heroic "high loaded Q" behavior.
But eventually you need to build the circuit and measure the actual performance.? By using the simulation tools I'm usually not terribly surprised by the final results.?
Recently I've been skipping the "breadboard on a blank PC board" step and going directly to having a circuit board made.? Using KiCad and JLCPCB is extremely quick and easy, and cheap enough that it makes more sense for me than hand-carving traces on a blank board.? Last night I sent this filter design off to JLCPCB for fab and assembly, specifying components in the JLCPCB/LCSC inventory.? I will get five assembled boards (minus the connectors) for under $12 each, including shipping.? It would be still cheaper if I ordered more, which I will once I get the design dialed-in.? Yeah, it will take about two weeks before the boards arrive here, but I've got so many irons in the fire that I will be plenty busy in the meantime.? This board combines a two-stage 10 MHz shelving filter, and a steep four-section 30 MHz elliptic low-pass filter.? This is intended to go between an antenna and a SDR having a sample rate of 66 MHz.? The shelving filter reduces the low-frequency signal level (where SDR overload is typically a problem), and the LPF is for additional anti-aliasing.? The "pure" design gives 70dB stopband attenuation, simulations show better than 60dB, and if I get at least 50dB then I will consider it a success.
--
Paul Elliott - WB6CXC
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Re: Birthday season at QRP Labs HQ
Hans
Happy birthday to all.
Are you really tall or are all your ladies short?
cheers
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Paul - AI7JR
Tom
Lee
Colin Kaminski
Ronald Taylor