Date   

Re: U4B and PuTTY Questions #u4b

tony.volpe.1951@...
 

Thanks for the advice Hans (and the super little item).

I just swapped it onto 20 meters from 30 and picked up more spots.




I am MORE than happy with that for one transmission with a random wire and an unun. The wire is about 18 feet at its highest. 

Very pleased with this. It is going to be fun putting it in a box with its solar panel and mounting it up on a pole in the garden. 

de Tony G0BZB


Re: QDX as receiver

Hans Summers
 

Hello Paul

QDX can receive SSB and CW just fine. However the audio passband is fixed at 150Hz to 3.2kHz which may be wide for SSB and certainly is for CW. 

I did not write code in the SDR for AM or FM. 

The reception frequency is anything above 3.2MHz, and you'd need some software to send CAT commands to QDX to tell it what frequency to sit on. Away from the bands you built the BPFs for (80, 40, 30, 20m) there will be attenuation. But the BPFs are not very narrow. 

Another alternative is to put the QDX in IQ Mode. In this mode, the QDX built-in SDR is not used, QDX then just functions as an SDR front and and high performance USB sound card. The raw I and Q signals are sent straight to the USB stereo Left and Right channels, and you can use any PC SDR program to demodulate them - which will normally include any mode (CW, SSB, AM, FM) and choice of filter bandwidth. 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: Paul VandenBosch <skyl4rk@...>
Date: Sun, May 8, 2022, 10:01 PM
To: QRPLabs@groups.io
Subject: [QRPLabs] QDX as receiver
Does the QDX work as a receiver for SSB, CW and broadcast bands? If so, which software would one use?


Re: qdx

Hans Summers
 

Thanks Pat

But not necessary. Mick's order was one of the over-orders in batch #2. Hence it will, where possible, be sent as early as possible in the current batch #3 shipping. And nothing is held over to future batch #4 because there has been no over-selling in the current batch #3, in fact the shop still shows 127 in stock. 

So there is simply NO PROBLEM here except that QRP Labs doesn't have 100 employees. 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: Pat <pat.ring1@...>
Date: Sun, May 8, 2022, 9:57 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] qdx
My QDX order is:  #56724.  You can ship my QDX to Mick and ship mine out of batch 4 or 5.  


Re: U4B and PuTTY Questions #u4b

Hans Summers
 

Hi Tony

I'm happy to hear that it is working fine! 

The reason all the U4Bs have "KM46" in them when they arrive from me is that they are all tested here before shipping. We connect an ST Link 2 programmer to flash the bootloader and lock the chip. Then use the bootloader to install the latest U4B firmware (U4B appears as a USB Flash drive and just copy on the firmware file, done!), then connect a GPS antenna and a PuTTY terminal, and run the "Hardware test" application. A "pass" is when the entire screen is white text, no red error reports. That also means it has the locator, MY locator. 

Normally even one satellite is enough to get the time, which comes in first, followed a few seconds later by the date. 3D fix requires at least 4 satellites with sufficient signal strength. 

There's also a system variable called GL whose value is 1 if a GPS fix was completed successfully in the last GPS statement, and 0 if not. You could use this to prevent transmission when there's no GPS lock. 

IF GL = 1
    WSPR blah blah blah 
ENDIF

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: tony.volpe.1951@...
Date: Sun, May 8, 2022, 9:30 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] U4B and PuTTY Questions #u4b
I just got my U4B today - it was delivered yesterday but I wasn't here. Up and running straight away in simple mode and getting spots from about 800 km away on a random bit of wire on 30 meter band. Looks like it will be a fun project to run it as a garden wspr tx with a couple of solar cells and a proper antenna when I get sorted.. 

When I first tried to run it, it didn't transmit for the first half hour or so even though it was powered by a 4.2 v battery. I am wondering of the GPS took a while to get enough data to get a fix. Strangely, the first two transmissions sent Hans's locator - KM46. The U4b is temporarily set up in a window and may not have had great GPS reception. It obviously had the time before it got a  proper fix on my location. 


Re: EFHW from ARRL

Charles Johnson
 

I'm baffled at the cult like following the EFHW has. Put up a balanced dipole on the frequency you want to operate on. A 40 meter dipole is only 34 feet on each side of the balun/center insulator.

 

Thanks, 73, Jim W7RY

Jim,

Three letters - HOA :-) I can easily and discreetly put the box with the impedance-matching coil on the side of my house and, for QRP levels, loosely run insulated wire through the trees in my backyard. Save the jump from the house to the first tree, no one will notice. I should note that in my subdivision, all utility connections are buried, so there's basically nothing in the air (all satellite dishes are on the back sides of the houses and any OTA TV antennas are in the attics). I will be doing very well to get one end of an EFHW antenna 20-ft in the air.

Also, while my house is in a unique position such that I could probably rig a (sloping) dipole that could go as low as 40m, there is the issue of the feedline - the issue isn't the length, but the lawn service! Even if I came straight down and went into buried PVC piping, it would never last :-/ (remember, their work speed is set to Warp 3 or something...) True, I could do my back yard by myself, but I'm very sensitive to heat (I live in Tennessee, USA) and since an EFHW is an option...

~~~~~~~

For those running antenna wires through trees, while version one of my EFHW is a K6ARK-based antenna with half of 24-ga zip-wire for the antenna (it's just for QRP levels), so long as the wire is draped fairly loosely, should I be OK? Also, what about if/when I want to kick it up a bit wrt transmitter power and/or do something like FT8? (I would think that the heavier duty cycle would call for a more robust antenna) Is the insulation on, say, 18-ga wiring bought from Home Depot sufficient? We don't have -that- much in the way of wind here (though we do have rain...), but better safe than sorry :-)

Thanks!

Charles Johnson
KF4AYT


Re: Activity status: repairs, builds, etc.

Pat - N0SHU
 

You are the man, Julian  I don't care what anyone else has been saying bad about you.


QDX as receiver

Paul VandenBosch
 

Does the QDX work as a receiver for SSB, CW and broadcast bands? If so, which software would one use?


Re: qdx

Pat - N0SHU
 

My QDX order is:  #56724.  You can ship my QDX to Mick and ship mine out of batch 4 or 5.  


Re: QDX glitches

Dr. Pedro E. Colla (LU7DZ)
 

Hi Alan,

V1_03


Re: qdx

Hans Summers
 

Hi Mick

I checked my emails, my spam emails and my helpdesk tickets and I don't have any recent emails from you anywhere. The last email correspondence from you was in February 2021.

You were one of those who was caught in the over-ordering situation in December when the batch of 385 QDX sold out in 4 minutes 44 seconds and allowed quite a few orders beyond available stock. Everyone was emailed and offered the choice of a full refund or waiting for the 3rd batch, which I was unable to estimate a date for. 

We've actually been through most of this many times already but the same questions keep coming up. Hopefully the following explanation will serve as a reference to anyone curious about this, at least for now. 

We have a US helper who handles some US orders at our discretion. We pre-ship stock there in bulk via FedEx and he onward ships via USPS to the final customer. This is explained on the QRP Labs shipping page FAQ on http://qrp-labs.com/shipping . This arrangement doesn't save any money but it does increase our peak surge capacity and that saves some time in some cases. This is why certain US orders have already been shipped and received very quickly via USPS. 

Of the 2000 batch #3 QDXs, 600 are in US and 1400 in Turkey. 

In general, all things being equal, each of these two lists would be shipped independently of each other, in chronological order, meaning the oldest first. But all things are not equal; there are a multitude of reasons which arise and interfere with the plan. Hence things may not be shipped in exact order. 

We really do do our best. Ordinary QRP Labs shipping volume is about 500 packages per month. Our capacity is much more than that. But right now there are suddenly almost 2,000 outstanding orders to ship. There's no way that can happen overnight. If I had anywhere near that many employees to handle that huge volume very fast, the rest of the year they'd be sitting idle... Spare a thought got how I would afford that. 

So please be patient. There's nothing anyone can do, we just have to get through the list as fast as we can, one day at a time, doing our best where possible to handle the earliest orders first. 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: "mick baldwin via groups.io" <mickm3for@...>
Date: Sun, May 8, 2022, 4:09 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] qdx
Hi i got no reply to my email to qrp labs so had no option but here  Mick

On Sunday, 8 May 2022, 13:58:07 BST, KK4ITX John via groups.io <jleahy00@...> wrote:


When I had questions on my order, I emailed the nice folks at the Support, address found on the QRP-Labs website and got responses even on a Sunday.  My guess is that company emails are viewed and responded to first before one gets into the multitude of email reflector ramblings.  Seeing the statement "Complete" fooled me also but you should know that it must be a UK way of stating the order has been received complete from you, not that the order itself is complete, shipped and filed away.

John
KK4ITX



Click Here for Zephyrhills Area Amateur Radio Club
Many of life's failures are people who
did not realize how close they were to
success when they gave up.
       Thomas A. Edison     


On Sunday, May 8, 2022, 05:58:15 AM EDT, mick baldwin via groups.io <mickm3for@...> wrote:


Hi when is my order from 17 12 21 going to be shipped says complete not shipped but some are saying received when ordered on 1 5 22, I would have thought you would have shipped those that have waited 5 months 1st, This in my opinion is not the thing to do. oh yes got my money      Mick

Virus-free. www.avg.com


Re: U4B and PuTTY Questions #u4b

tony.volpe.1951@...
 

I just got my U4B today - it was delivered yesterday but I wasn't here. Up and running straight away in simple mode and getting spots from about 800 km away on a random bit of wire on 30 meter band. Looks like it will be a fun project to run it as a garden wspr tx with a couple of solar cells and a proper antenna when I get sorted.. 

When I first tried to run it, it didn't transmit for the first half hour or so even though it was powered by a 4.2 v battery. I am wondering of the GPS took a while to get enough data to get a fix. Strangely, the first two transmissions sent Hans's locator - KM46. The U4b is temporarily set up in a window and may not have had great GPS reception. It obviously had the time before it got a  proper fix on my location. 


Re: #QDX Rev3 Manual now available #qdx

david
 

Hans and all,

It was the usual interesting read. I'm eagerly awaiting my opportunity to follow it.

Just to show that I read the manual, there is a confusion on page 31 (section 2.14)
The text has "X1 - USB ......X4 - BNC", but the drawing below the text has 'X1 as BNC through to X4 as USB'.
I don't expect this to cause any real confusion, but you might want to change the text in a future revision.

Best Wishes
David, GM8XBZ

-----Original Message-----
From: QRPLabs@groups.io <QRPLabs@groups.io> On Behalf Of Hans Summers
Sent: 07 May 2022 11:08
To: QRPLabs@groups.io Notification <qrplabs@groups.io>
Subject: [QRPLabs] #QDX Rev3 Manual now available

Hi all

The Rev3 manual is now published see http://qrp-labs.com/qdx .


Re: Activity status: repairs, builds, etc.

N3MNT
 

No explanation is needed although appreciated I am sure.  Your assistance in trouble shooting here and actual repair at home goes way above and beyond.  I know those who have benefitted from your help are very grateful.


Re: U4B and PuTTY Questions #u4b

Johan Bodin
 

Choose a serial port and set its parameters under Category/Serial:

Choose connection type Serial under Category/Session:

You can save the settings for later use by typing a name, for example U4B, in "Saved Sessions" and click Save. Next time you start PuTTY just click U4B and then Load.

73 Johan SM6LKM

Ron Carr wrote:

On Sat, May 7, 2022 at 04:07 PM, Mike AE0IH wrote:
/dev/ttyACM0 is now returning:
It has been awhile since I ran a Unix system but I believe you do not run /dev files.  You need to run Putty and pick the serial device to connect to.


Re: Q6 MPS 751 source

Ronald Taylor
 

Here's a Mouser P/N George:     512-MPS751

Ron

On Sun, May 8, 2022 at 7:22 AM George Korper <georgekorper@...> wrote:
Hi All, 
Anyone who has a DigiKey or Mouser part 
number for the MPS 751. In WSPR or Beacon it seems to
be hotter than the BS 170's and I would like spares. 
Hans, thank you.
Thanks,
George


Re: Q6 MPS 751 source

Steve in Okinawa
 

George, you can substitute any PNP with at least the same voltage rating. I used one in a small power package on the reverse side of the board in my original QCX.


QCX AGC youtube W2AEW

cris blak
 

Hello Everybody,

I just found one of the newest Alan's W2AEW youtube video. This time was about installing the new AGC kit on the QCX.
As usual, well documented and very valuable for self instruction.
Have look and enjoy.

A big THANKS for Alan and all he did to teach others.

73 de YO3FFF
Cristi


QDX Build suggestion

David Birnbaum
 

Based on my experience with v1 I would wind all the toroids first. That way once you start soldering parts in place you don't have long breaks as you wind and install each toroid.

dave
k2lyv


Activity status: repairs, builds, etc.

 

I have a couple of outstanding repair/build project for my friends here, so rather than address each one individually, and in the interests of  transparency, here's a general status note:


I've just returned from a week-long business trip to California late last night. It's Mother's Day, and the XYL deserves some attention. I'll get back to the bench tomorrow evening. Some awaited parts have arrived, so hopefully I should be able to turn around those units awaiting them.

As a gentle reminder, please be aware, that I do this as a volunteer, and I'm not retired, which means that while I can (and choose to) do the work for essentially zero cost, my time has to be divided up between my job, my family, and my commitment to you all on this list. My job has been more demanding than I expected it to be, so I am later in completing some commitments than I had anticipated, for which I apologize. In accepting future commitments I will be clear to communicate anticipated timelines, so as to make you aware of your options.
--

Julian, N4JO.

p.s. If anybody cares, my new job entails working on software development for an autonomous flight control system for be used first for small cargo aircraft (e.g. Cessna 208B Caravan), and later for privately bookable flights for 4-6 passengers (think "flying regional Uber") using a custom electric aircraft currently in development. I'd be happy to share more privately: it's the dream job of a lifetime, the capstone project of my career. But I still love amateur radio, and especially supporting QRP and kit-building, so despite being busier than a one-armed paper hanger, I'm not giving up on y'all.
=============


Re: U4B and PuTTY Questions #u4b

Ron Carr
 

On Sat, May 7, 2022 at 04:07 PM, Mike AE0IH wrote:
/dev/ttyACM0 is now returning:
It has been awhile since I ran a Unix system but I believe you do not run /dev files.  You need to run Putty and pick the serial device to connect to.

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