Date   

Re: If a U4B was to be used as a garden dipole

tony.volpe.1951@...
 

This is brilliant stuff Hans. Very exciting things being done here and made available to lots of people. It is a very long time since I did any Basic programing (or any programing). I think I did it on a ZX81 and  a BBC B! The provision of th installed three line WSPR transmission program would suit my garden solar powered beacon perfectly as the first stage of use for my UB4. 

Many thanks for your detailed response. 

Tony 
G0bzb


Re: Screeching feedback on QCX-Mini startup #10W_PA #20m #troubleshoot #qcxmini #problem

 

OK, sounds like a plan. You said resetting; you meant cycling power, right?

That additional information does support the bad op-amp hypothesis, though it could be something else that makes the system marginally unstable, like a whisker short or something...  That's the problem: there are thousands of ways for it to be wrong, but only one for it to be right.
--
Julian, N4JO.


Re: Screeching feedback on QCX-Mini startup #10W_PA #20m #troubleshoot #qcxmini #problem

Vance.Langer@...
 

I can try artificially cooling the components once it's properly powered up. The thing that gives me doubts about this is that as the squealing quiets down, it never completely goes away and the audio (such as practice sidetone) is faint and not quite right. Resetting until a quiet startup gives good audio, but resetting again after that could still cause noisy startup


Re: BEGINNERS & QDX R2 :-(

Skip Davis
 

Tom when you try to reflow the solder joints on those parts make sure you allow the heated side to cool down otherwise you may remove the parts unintentionally.

Skip Davis, NC9O


Re: QCX Mini keyer stuck #qcxmini

 

To expand on Steve's two emails...

As he says, those pins are shared by the GPS input, and by a connected in-circuit programmer, so be sure to not have either of those connected when the Tx is live.
It doesn't sound like you do, so moving on...

The dit and dah line should float to logic high (5V) and are brought down to zero by what you might consider to be "manually induced shorts to ground" by the contacts of the key.  So if the dit key inputs floats at between 1.25 and 0.5V, then it will be seen as a key-down, explaining your stream of dits.

You said that reversing the key dit-dah allocation, the continuous stream changes from a stream of dits to a stream of dahs: this proves that it is the processor input pin that is nearly shorted. That short might be in the processor itself, however....

You then said that you get a stream of dits or dahs even when i straight mode. That definitely suggests that either there is a short to another high impedance pin (yes, I know you said you tested and said there aren't any shorts, but I deduce that you are looking for shorts to ground, and there are more possibilities than that!) or there is a problem in the processor itself. I can't imagine how the processor decides to run Iambic when straight is selected. UNLESS you tried to configure the unit with the GPS attached: if you did that, chaos will ensue, trust me. Do not do that - ever: the sky turns green, up is down, text finds its way into numerical fields, libs and dems live in respectful harmony, you get my point.

If you are getting appropriate interaction while configuring the unit, and can tune the VFO, and so on, then the problem seems constrained to the dit input. Either there is a short from the dit input pin (19) to some other track (as Steve says: check the programming header socket) OR the processor is indeed faulty.
--
Julian, N4JO.


Re: Thank You Hans QDX rev. 2 Brilliant

Bill Sanders
 

My mini build went just like that ... so smoothly! Bravo! +1

My hope is that the example QRP Labs set is contagious ... it wouldn't hurt anyone if all the kit makers stepped up to that level ... or at least strived for it :)

73 de Bill (AI1S)


Re: Win7 + QDXv2 not recognised #troubleshooting #qdx #w7

Alan G4ZFQ
 

On 07/01/2022 12:12, Alan G4ZFQ via groups.io wrote:
On 07/01/2022 10:47, Mike wrote:
 despite installing, and re-installing, the relevant drivers for WIN7 it refuses to be recognised.
Mike,
Missed a step

"I am not certain if the first STM installer has to be run first but I think it would need to be otherwise the drivers will not be present on the computer."

I guess this installation did not actually work even after I tried forcing the installation.

73 Alan


Re: Win7 + QDXv2 not recognised #troubleshooting #qdx #w7

Alan G4ZFQ
 

On 07/01/2022 10:47, Mike wrote:
despite installing, and re-installing, the relevant drivers for WIN7 it refuses to be recognised.
Mike,

I made these notes, put it on my old laptop for testing.

https://www.st.com/en/development-tools/stsw-stm32102.html STM XP-W8 drivers \en.stsw-stm32102_v1.5.0(1).zip


http://deviceinbox.com/drivers/859-stm-virtual-com-port-drivers.html

This downloads \STM_Virtual_COM_Port_1.3.1.zip. In it are .inf files.
Try updating the driver and directing the installer to the relevant .inf 32/64 bit.

Select COM ports
Select STMicroelectronics - virtual COM port
Dimiss "unsuitable" warning.
Now the COM port should show in Device Manager.
This may be required if you subsequently use a different USB port.

I also think I never got W7 to see the QDX as a memory stick for updating..

73 Alan G4ZFQ


Re: QCX Mini keyer stuck #qcxmini

g4edg
 

 Hi Rob


The keyer may register a Dit or a Dah with far more resistance than the "short" of a keyer contact. Looks like your 0.5 to 1.25v on the dot line is being registered as a logic 0.

For reference my QCX mini, dit and dah lines sit at 4.9v and measuring 132 microamps when connecting my DVM between dit or dah lines to 0v to create a string of dits. 

73 Steve G4EDG


Re: QDX Rev.2 PROBLEM. >>HELP<< #qdx

Mike
 

Tom M7MCQ wrote...
I’m not being funny, but there is absolutely no way that I got T2 wrong.
How many times have I read that :-), ISTR actually saying it myself .... once ......


Win7 + QDXv2 not recognised #troubleshooting #qdx #w7

Mike
 

Just finished the QDX V2 and its working fine on a WIN10 and a LINUX box, but despite installing, and re-installing, the relevant drivers for WIN7 it refuses to be recognised.
I've read all the other list comments and tried all of them, hot/cold/lukewarm/frozen boot etc. any ideas gleefully received.
Is'nt the thing tiny, but doing well on 40m into an inv-vee.73 Mike


Re: QCX Mini keyer stuck #qcxmini

wa8yan.radio
 

On the other hand, were Hans to say he needed any and all spares my 2 would be in shipment to him no cost and I'd pay the shipping, and then thank him !
73 Phil WA8YAN



Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: "Chris Wood via groups.io" <g4cws@...>
Date: 1/7/22 5:10 AM (GMT-05:00)
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] QCX Mini keyer stuck #qcxmini

Rob

Don't tell Hans you've got some unused 328s - he'll be round at dead of night in his mask and striped jumper!  :-))

Chris  G4CWS


Re: If a U4B was to be used as a garden dipole

Hans Summers
 

Hi Tony

If you look at http://www.qrp-labs.com/flights/u4b26.html (on its 6th world tour) that you were receiving yesterday and is currently over Libya, you will see that there are two maps. 

The top map is the one generated by my Excel spreadsheet we have been using for tracking for nearly 7 years now. The spreadsheet parses WSPR data and decodes the second telemetry WSPR packet, to extract the 5th and 6th Maidenhead  subsquare characters, altitude, ground speed, temperature and battery voltage. It converts the grid subsquare to latitude and longitude and creates a Google map which is FTPed to the QRP Labs website. At the top of the map is some text which currently as I write this, reads:

Updated 07-Jan-2022 09:34Z; Loc=JL76GB, Duration=3d 00h 34m, Distance=191,313km
Alt=11,720m, Speed=80knots, Batt=3.41V, Temp=9C, GPS=1, Sat=1


Note that the "Duration" parameter lacks month data and should be fixed really. 

The second map basically moves that whole Excel spreadsheet process into some code I wrote that runs on the QRP Labs web server. It industrializes the decoding and tracking process, making it robust, reliable and scalable. This system can support up to 600 simultaneous balloons flying. 

The optional 3rd and 4th WSPR transmissions can send your own customized numeric data or 7 characters of free text per message. These are also extracted and decoded and written both to the screen and to a database so you can later retrieve the whole flight. The server program also writes a Google map, automatically colour coding each lap of planet Earth with the resistor colour coding :-) 

This is an example from U4B-26 currently:

Updated 2022-01-07 09:34:00 UT, Loc=JL76GB, Duration=, Distance=
Alt=11720m, Speed=80knots, Batt=3.41V, Temp=9C, GPS=1
WSPR Frequency: 14097024 from 28 reports.
TELEN #1: 345601 101713, TELES #1: OHN6OKQ


Note that I did not yet add the code for calculating the duration and total distance estimate so these are shown as blank. The third row shows how many WSPR stations reported this slot, and also the WSPR transmission frequency, which is calculated in realtime by my program using a cross-referencing matrix of all 20m WSPR reports in the last few minutes, allowing accurate estimation of the errors on receiving stations' frequency calibration. The frequency accuracy is usually +/-1Hz. It also lets us see how well the TCXO on the U4B is doing! 

The fourth line is the decoded third WSPR packet which carries additional telemetry that Dave has customized to this flight; you can see the BASIC program listing at http://www.qrp-labs.com/flights/u4b26.html (scroll down). The data contains:
  • Measurement from the down-facing cloud reflected light sensor 
  • Measurement of the available power output from the solar panels
  • Measurement of how long it took the GPS to get satellite lock
  • Temperature measurement from an external additional I2C temperature sensor (out in the cold)
  • Whether the U4B is transmitting on low power (9mW) or high power (27mW)
These are packed into the two numbers shown there 345601 101713. The interpretation of those numbers, I don't know off the top of my head though examination of the BASIC program would reveal it. 

If Dave had wanted to send additional telemetry back he could have used a 4th WSPR transmission, and that would also get decoded by the server and written to the screen (and database). 

I also plan on making available a download feature so that a user can download the entire data for their flight. 

73 Hans G0UPL
http://qrp-labs.com

On Fri, Jan 7, 2022 at 12:38 PM <tony.volpe.1951@...> wrote:
@ Dave VE3KCL:

I've been receiving your current balloon Dave. It came our way the day before yesterday, passing over and then turned south over France and is now over the Sahara. I was getting it yesterday when it was in the south of France, but not so far today. It may be too far now for my KIWIS SDR setup. Since I am running wspr on my QCX+ on twenty, the local oscillator is constantly running as a strong signal in the WSPR band even when the setup isn't transmitting. This probably de senses the decoding on the KIWI.

I was reading yesterday about how you encode and decode the telemetry... Looks like a pretty tough process if you have to decode it manually.


Re: QCX Mini keyer stuck #qcxmini

Chris Wood
 

Rob

Don't tell Hans you've got some unused 328s - he'll be round at dead of night in his mask and striped jumper!  :-))

Chris  G4CWS


Re: Clamshell battery pack for QCX mini

wa8yan.radio
 

That looks like a possibility Luc, thanks for the pic.  They are always worth the proverbial 1000 words. 
73 Phil WA8YAN



Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: ON7DQ Luc <on7dq@...>
Date: 1/7/22 2:32 AM (GMT-05:00)
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Clamshell battery pack for QCX mini

Hi Phil,

maybe make something like this, and stick it to the side of your QCX+
My paddle was made from a strip of double sided PCB, and two relay contacts.
Cable was cut off from a broken earpiece. Two pieces of plastic glued on as fingerpieces.
In the picture, it is attached to a QCX Classic.

73
Luc ON7DQ


Re: Clamshell battery pack for QCX mini

wa8yan.radio
 

Actually it was 2 days after I placed the order before I got the email that it was shipped and then 7 days later it was here.  He makes them as soon as he has your order and ships them immediately.  Mine was shipped by Spanish then. US Postal Service.  I was VERY pleasantly surprised actually.  No complaints about getting it to me and a very nice little key.  The touch is at least as good as my Kent paddle.  You can tell I'm a fan can't you ? 
73 Phil WA8YAN
CW FOREVER !



Sent from my Verizon, Samsung Galaxy smartphone


-------- Original message --------
From: "Mike Perry, WA4MP" <editor@...>
Date: 1/6/22 10:10 PM (GMT-05:00)
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Clamshell battery pack for QCX mini

I thought of doing much the same and may still. But I needed one quickly and I feared that the wait list for one of EA3PP’s works of art might take months.

—Mike Perry, WA4MP

> On Jan 6, 2022, at 8:14 pm, wa8yan.radio via groups.io <wa8yan.radio@...> wrote:
>
> I recently purchased a small paddle from EA3PP in Barcelona, Spain. This is a fine instrument and totally worth the $33 USD I paid for it.  I really enjoy using it.
> 73 Phil WA8YAN
>







Re: If a U4B was to be used as a garden dipole

tony.volpe.1951@...
 

@ Dave VE3KCL:

I've been receiving your current balloon Dave. It came our way the day before yesterday, passing over and then turned south over France and is now over the Sahara. I was getting it yesterday when it was in the south of France, but not so far today. It may be too far now for my KIWIS SDR setup. Since I am running wspr on my QCX+ on twenty, the local oscillator is constantly running as a strong signal in the WSPR band even when the setup isn't transmitting. This probably de senses the decoding on the KIWI.

I was reading yesterday about how you encode and decode the telemetry... Looks like a pretty tough process if you have to decode it manually.


Re: QDX Rev. 2 as SWL SDR, too? #qdx

Rod Smith
 

Thank you, Hans.  Congratulations on your QDX; I hope you find a way to produce enough kits to meet the enormous demand, and then have that high bands version available in time for the sun spots.

73
Rod G0VKX


QCX Mini keyer stuck #qcxmini

Rob KI4MCW
 

I just finished building a QCX Mini for 40m, and was doing the alignment procedure... when the radio started beeping frantically. The keyer sends a continuous stream of dits and will not stop. I have to put the radio in practice mode to prevent it from transmitting.

More;

* The dit lead from the key jack is not shorted anywhere (tested a dozen different times and ways by DVM). I have tested at key jack, at the ICSP pins, and also at the controller socket with the chip out. That said, the voltage on that line in all three places is between 1.25 and 0.50 vdc.

* The dits are flying either with or without a key attached. If I plug paddles in and hold the dah paddle down, it alternates iambically. Reversing the paddles (via menu) switches the dits to dahs.

Sounds like a basic short somewhere, right? But now it gets weird.

* The dit-storm does not always start right away, but sometimes takes a minute or so after power-up to start.

* At first it only played dits when in an iambic mode (silent when in straight key mode), but now the radio dits continuously no matter what keying mode is set.

Board version 3, firmware 1.08, both TCXO and AGC are installed. I have done multiple factory resets, and tried two different power supplies. All testing has been done with a dummy load attached.

I'm perfectly willing to concede user error, but I just can't figure out where else to look. Any suggestions? 

Rob 

PS, I have a couple of never-used ATmega328s and a programmer, so I suppose I could try swapping microcontrollers if the firmware is available.


Re: Clamshell battery pack for QCX mini

ON7DQ Luc
 

Hi Phil,

maybe make something like this, and stick it to the side of your QCX+
My paddle was made from a strip of double sided PCB, and two relay contacts.
Cable was cut off from a broken earpiece. Two pieces of plastic glued on as fingerpieces.
In the picture, it is attached to a QCX Classic.

73
Luc ON7DQ

14281 - 14300 of 91336