Re: QCX Firmware Featuure Request
Hans
It's used to verify that GPS is working.? Now gives impression that GPS is not working
Thanks?
73 Warren K2GQT
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Re: 80m QCX - Questions about how I'm diagnosing a problem
Thanks for that Michael. I plan on using some #32 I have on hand. Since I am more a 'maker' than a 'haver', it is all about the journey. Will post my results. -- Wes
AE6ZM
Hereford, AZ
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Re: DDS VFO - No Heartbeat
?Well, that took all of 5min.? I had an Arduino Uno.?? I used XLoader to upload the latest hex file (ie 1.0.4).? Swapped the chips.? I went in and set the GPS and the Line 2 to #HB.
Unfortunately that didn't take care of the problem.?
?I add #HB and then the Enter character and then hit the left button.? It saved it.? However now line 2 is all zeros that flash.?
?I'm closer. lol
73, Michael
KM4OLT
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On my 40m QCX kit, I measure only .31W at the output of the antenna into a 50Ω load. If I measure at the mosfets, I get 5.2W out, but if I measure at the other pad of C29 (the one not connected to the mosfets), I get 0.3W again. Does anyone know why this might be?
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Re: DDS VFO - No Heartbeat
?I was looking at the later version manuals.? The 1.01a has very limited things.? One of which is the #HB.? So now looking into upgrading the firmware.? That should be interesting.?? I'll keep you all posted on how that works out.
73, Michael
KM4OLT
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Re: QCX Firmware Featuure Request
Hi Warren
8.13 GPS Display is only for informational purposes, not actually used for anything. But anyway, I do already have that on my list to investigate. So will try to get it resolved soon.?
73 Hans G0UPL
On Sat, Dec 2, 2017 at 11:57 PM, <whend@...> wrote: Hans,
Some users, myself included, are having problems displaying complete GPS data when using menu 8.13 DPS display.
A similar problem in the U3s could be eliminated by setting GPS "check" to 0. It would be useful to provide a menu item in the QCX to turn off checksum validation.?
Thanks and 73,
Warren K2GQT
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QCX Firmware Featuure Request
Hans,
Some users, myself included, are having problems displaying complete GPS data when using menu 8.13 DPS display.
A similar problem in the U3s could be eliminated by setting GPS "check" to 0. It would be useful to provide a menu item in the QCX to turn off checksum validation.?
Thanks and 73,
Warren K2GQT
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Re: My QCX 30M grabber is on the web.
Where's the python code (LOPORAv3d.py) that you talk about? This is fantastic, it's what I'm in the process of doing with the bitx: receiver, audio patch cables, USB sound, headless Raspberry Pi v3. I'd love to be able to use an ADC and Pi (or better, ESP32) eventually, but I'll be happy to get things set up.
On Sat, Dec 2, 2017 at 11:07 AM David R. Hassall WA5DJJ < dhassall@...> wrote: Dear Members, ? Last night the last piece of the puzzle fell into place and my 30M QCX Grabber is on the web.?? The equipment configuration consists of a QRPLabs 30M QCX transceiver used as the grabber’s receiver with NO ,MODIFICATIONS.? A Raspberry Pi 3 running LOPORAv3d.py software and an inexpensive USB sound card.?? It is presently a “engineering Prototype” on my workshop bench but it is giving me extremely ?excellent pictures on the website ( ) of both close and distant QRSS transmitters.?? I am very pleased with its operation and value.?? It makes the cost per band for building QRSS Grabbers? and WSPR grabbers less than $100 per band.?? This allows all of us to build a grabber and help overcome the present problem of lots of transmitters but very few grabbers to receive them or no grabbers available on bands other than 30M or 40M for long haul observations.?? It also makes it no longer necessary to tie up an expensive Amateur Radio Transceiver or other expensive receiver being used for monitoring the QRSS Grabber frequencies.? Han’s little QCX transceiver does the job with ease at only $49 each.? (This is not a commercial, just my humble opinion) ? Here is the picture of my 30M “Engineering Prototype” Grabber:
? ? Well, back to work,? I have just finished the 40M QCX and need to get it ready for the next step in my grabber configuration. Merry Christmas and hope we all have a better New year. ? Take care and have fun.? QRSS IS A BLAST, even at mW’s ? 73 Dave Hassall WA5DJJ? Las Cruces, New Mexico Website: ?
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My QCX 30M grabber is on the web.
Dear Members, ? Last night the last piece of the puzzle fell into place and my 30M QCX Grabber is on the web.?? The equipment configuration consists of a QRPLabs 30M QCX transceiver used as the grabber’s receiver with NO ,MODIFICATIONS. ?A Raspberry Pi 3 running LOPORAv3d.py software and an inexpensive USB sound card.?? It is presently a “engineering Prototype” on my workshop bench but it is giving me extremely ?excellent pictures on the website ( ) of both close and distant QRSS transmitters.?? I am very pleased with its operation and value.?? It makes the cost per band for building QRSS Grabbers? and WSPR grabbers less than $100 per band.?? This allows all of us to build a grabber and help overcome the present problem of lots of transmitters but very few grabbers to receive them or no grabbers available on bands other than 30M or 40M for long haul observations.?? It also makes it no longer necessary to tie up an expensive Amateur Radio Transceiver or other expensive receiver being used for monitoring the QRSS Grabber frequencies.? Han’s little QCX transceiver does the job with ease at only $49 each.? (This is not a commercial, just my humble opinion) ? Here is the picture of my 30M “Engineering Prototype” Grabber:
? ? Well, back to work,? I have just finished the 40M QCX and need to get it ready for the next step in my grabber configuration. Merry Christmas and hope we all have a better New year. ? Take care and have fun.? QRSS IS A BLAST, even at mW’s ? 73 Dave Hassall WA5DJJ? Las Cruces, New Mexico Website: http://www.zianet.com/dhassall/ ?
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Re: DDS VFO - No Heartbeat
Well I set the GPS setting and the Line 2 to #HB.? But I get a flashing PR line.?
? Not sure at this point.?
Michael
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Re: 80m QCX - Questions about how I'm diagnosing a problem
I followed the manual so
Primary: 5T?
S1: 5T
S2: 5T
S3: 68T
I used a little smaller wire but still had to stack turns
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Re: QCX toroids and start up
I explained to a supervisor one time that the day I? made no mistakes was the day he should fire me, since that was the day I? did nothing. -- Wes
AE6ZM
Hereford, AZ
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Re: 80m QCX - Questions about how I'm diagnosing a problem
I have yet to start on my QCX-80, but your response trace looks good to me. I am curious what your turn counts are. -- Wes
AE6ZM
Hereford, AZ
?
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80m QCX - Questions about how I'm diagnosing a problem
I'm finally working on the 80m QCX. So far it looks like I wound T1 right but I'd like confirmation if possible.
The test method that I used is simple. I have a spectrum analyzer with a tracking generator. The TG is connected to the antenna connection and I have a 1x scope lead connected to the SA and the other end connected to the transformer winding that goes to pin 7 of the Quadrature Sampling Detector.?
SA settings (not sure what is useful info)
Span: 3.0 MHz
Center: 3.52 Mhz
10dB per division
C1 position vs peak freq on the SA
Meshed: 3.123 MHz
Open: 3.753
Unless I am completely off base, a distinct possibility, I think T1 is wound correctly but I'd like confirmation so I can move on.?
Here's a pic of C1's position?
and the SA peak at 3.52MHz
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Re: 17 meter QCX output issue.
Thanks Guy, got it covered, but it's very nice of you to make the offer.? Denny
On Sat, Dec 2, 2017 at 12:31 AM, Guy N7BIR <sgbridge@...> wrote: Dennis,
i have a few MPS751’s. If you need some let me know. No charge.?
73,
Guy N7BIR?
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Re: QCX Troubleshooting - Please can you help?
The encoder part sounds a bit strange, it has dedicated pins to the micro and does not operate in analog mode. Put the scope on those two pins and while rotating the encoder see that it looks like a clean square wave with 5V amplitude. The chip has built in pullup (activated by the program) so the positive going flank should have more of a rounded edge than the negative.
Nothing wrong with the socket? like pins not sitting properly ? Scoping the sidetone pin 15 should also show a square wave, at 700Hz or whatever it is set to in the menus. Perhaps doing a factory reset, woult not hurt and eliminates any possible strange settings messing something up.
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Re: QCX modification for 40 Meters
Om du vill prova att k?ra den innan du f?tt encodern s? g?r det att g?ra med str?mbrytare ist?llet, googla encoder s? ser du kanske hur du beh?ver sk?ta dom f?r att ?stadkomma samma sak som att rotera encodern.
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Re: QCX modification for 40 Meters
BONSOIR HANS,
j"aurais aimé répondre ,mais je n'ai toujours pas re?u l'encodeur
et je suis toujours bloqué sur 3520,000 certes j'entends
asez bien la cw avec le filtre 40m mais c'est tout la bf pour moi
la bf est suffisante, j"ai intègré un petit haut parleur
de 24 ohms dans le boitier de pd7maa, et c'est très bon ,si
vous avez les ref de l'encodeur je peux peut être trouver chez
"Mouser"
73 jo?l f6cht.
Le 02/12/2017 à 05:18, Hans Summers a écrit?:;HANS
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50V is enough.
73 Hans G0UPL?
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Re: QCX Troubleshooting - Please can you help?
Hi Julian, I have done some thinking on this, and if I were you I would go back to the original configuration (remove the modification) and start from there. The reason I say this is that your problems seem to have surfaced after you did the modification. Although it fixed your start-up issue you ended up with more problems. The sidetone is generated by the processor so with a scope you could check that on the? pin of the processor. There is quite of bit of good documentation in the assembly manual, along with circuit descriptions and diagrams. The Rotary encoder is very dependent on a good 5 vdc supply and I believe that is part of the modification that you had done, depending on which one that you did. Back to the sidetone issue you have a newly programed chip installed and I would check the parameters in the software for the generation of the sidetone level and frequency. Check and make sure you have a good clean 5vdc coming from your 5 volt regulator. Thats about all I can say but, wish you well. Bill KN8DMK
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Times do indeed change. When a few decades ago the idea emerged that it would one day be realistic to produce a Software Defined Radio, G4OKW suggested on our local repeater in Suffolk (UK) that it would now be possible to “write a radio”.
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On 2 Dec 2017, at 10:48, Howie WA3MCK < Wa3mck@...> wrote:
As a Novice back in the 60’s I made a monthly pilgrimage to the library in order to “Xerox” schematics and aerticles from QST which I could not afford... ?now I can have an enclosure created on a 3D printer at the library... AMAZING - how times change.
de Howie WA3MCK?
On Fri, Dec 1, 2017 at 18:14 PeteWK8S < pmeier@...> wrote: For those without a 3D printer be sure to check your local library. Many now have printers you can use or even drop off your .stl file for them to print and cheaper than you can do it yourself.?
Pete WK8S?
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Wes WB7BR
Michael Monteith
Daniel Ekman SA2KNG