Re: My QCX 30M grabber is on the web.
Hi,
the python source for the LOPORA program can be found here:?
73 de Hajo
On Sat, Dec 2, 2017 at 9:17 PM, Ted Timmons <ted@...> wrote: 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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Re: 80m QCX - Questions about how I'm diagnosing a problem
I'm still having issues with this one. While the bandpass filter peaking with the alignment menu confirmed that the SA method worked, when I checked the output using the alignment section the value was very low (3 with 6 or 7 bars) and could not be raised. I couldn't get any more out of it using the QCX display and internal sig gen. I don't think that is a bandpass filter problem or transformer problem but acknowledge that it could be. I guess I could see if Han's voltage chart has anything for the QSD and make sure the voltages are correct. Unfortunately the chart was made from the internal voltmeter and it's not a high impedance meter. I'm already wearing "eyeball amplifiers" just to use my test equipment. I don't think I would like using a little piece of wire. Nothing against the internal test equipment. I think its a wonderful addition. I just don't think I can use it effectively.
I can't see where the ?P samples the signal for display on the schematic. If it's before the quadrature sampling detector then I don't know. It tunes but doesn't pass adequate signal. If it's after the quadrature sampling detector (I think it is) then the "blockage" is elsewhere in the signal chain.?
The thing that's odd is that I know that on first power up and alignment I was able to get a high reading and balance down in the 2's with a fairly high level. Now the alignment is very, very touchy. Like when a pot is noisy. Something changed but I haven't found it yet.?
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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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Hajo Dezelski
Wes WB7BR
Michael Monteith
Daniel Ekman SA2KNG