Date   

Re: Modify REV 5 Already Built?

Dean Smith
 

Hi Scott..
And just in case you and others may not be aware!
There is a forum dedicated to this project here..  https://groups.io/g/ucx/topics


Re: Modify REV 5 Already Built?

Guido PE1NNZ
 

Hi Scot,

Yes, if you have a QCX already built you can still run the original SSB mod (without removing half of the components). It also works on as Rev 5 board. To do so make the following changes:
  • SSB receiver: Insert a SPDT switch between C21(+ side) and IC9(pin1) for CW and R27(pin2) for SSB (as was done in original QCX-SSB modification). This will implement an analog SSB backed. If you want to experiment with DSP, you can disconnect the SIDETONE pin, and hook up a loudspeaker with 10uF capacitor in series. It is not an SDR hence you still need to do the analog alignment procedure.
  • SSB transmitter: change D4,R56 (10k); R58 (.22uF); C32 (10uF), remove C31; wire IC2(pin21) to pin R57(side DVM-pin3); wire IC2(pin20) to DVM(pin2); wire IC2(pin18) to junction D4-C42-R58; install a microphone to tip (+ of electret) and sleeve GND of paddle-jack; PTT-switch to ring and sleeve (X1M-mic).


On Tuesday, June 9, 2020, scot forshaw <scot.forshaw@...> wrote:
Hi all,

With the demise of the original QCX before getting a chance to get another to modify, I was combing GitHub to work out if a fully built QCX R5 can be modified without butchering it?

By that I mean, the original QCX-SSB mod seemed to imply just 4 component changes and a few wires...
All the instructions there are for Rev4 boards to do the simple changes required, but then 5 comes along and separate instructions that all seem to consider a new unbuilt kit?
Seems also the project moved on and I can fully work out if the newer revisions of Guido's code and all the improvements will work with Rev 5 "unless everything is ripped out" making it no longer possible to switch the mods in/out.

So my questions are:-

Can the Rev 5 be modified without ripping out half the components?
If so, does it have the same features (sdr rx etc) as one built from scratch?
Finally, can it still be implemented with the ability to switch it in / out as in the first incarnation of QCX-SSB?


I am not particularly worried about backward compatibility I guess, but as it is already built it would be nice if possible.

Cheers
Scot




Modify REV 5 Already Built?

scot forshaw
 

Hi all,

With the demise of the original QCX before getting a chance to get another to modify, I was combing GitHub to work out if a fully built QCX R5 can be modified without butchering it?

By that I mean, the original QCX-SSB mod seemed to imply just 4 component changes and a few wires...
All the instructions there are for Rev4 boards to do the simple changes required, but then 5 comes along and separate instructions that all seem to consider a new unbuilt kit?
Seems also the project moved on and I can fully work out if the newer revisions of Guido's code and all the improvements will work with Rev 5 "unless everything is ripped out" making it no longer possible to switch the mods in/out.

So my questions are:-

Can the Rev 5 be modified without ripping out half the components?
If so, does it have the same features (sdr rx etc) as one built from scratch?
Finally, can it still be implemented with the ability to switch it in / out as in the first incarnation of QCX-SSB?


I am not particularly worried about backward compatibility I guess, but as it is already built it would be nice if possible.

Cheers
Scot




Re: Upgrading firmware on the QCX to Ver 1.05 ....where is the .hex file

Kees T
 

After everything is said, the net is that the QCX (and QCX+) is a very well and thoughtfully designed QRP rig for low $$. The likes of which we (or at least in my 60+ years in ham radio) have never seen before. The 10,000 sold sure reinforces that.

Great piece of work Hans.

73 Kes K5BCQ


Re: How about a QSX

Hans Summers
 

Hello Chuck

Many thanks for your kind, thoughtful and supportive feedback and comments. 

Change is inevitable. It is easy to see the evolution in design from the first kit in May 2010 to the present day. Thanks to so many of you, the growth in my own skills and knowledge is clear to see too. There's still a long way to go!

Success drives growth, and this seems also somehow inevitable. 

I believe the original concept of performance, quality and low price all at the same time, delivered with passion and throughly backed up, lives unaltered through the last 10 years... and will through the next and the next! 

Thanks again for your support and that it so many countless others over the years, past and present. 

73 Hans G0UPL 


On Tue, Jun 9, 2020, 00:38 Chuck, N1KGY <cwayers17@...> wrote:
Hans,
Your stuff upper lip is world class, as are your kits. :)
I've said it before and I say it now - don't change a thing about QRP Labs. Please. 
In context: I just purchased my 7th kit from QRP Labs, owning now 2x U3S w/QLG1 each, a QCX40, and a Progrock (my original U3 having recently been retire by ESD/lightening), and I expect I'll buy at least that many more in coming years.
I've bough and built radio kits from at least a dozen other outfits over the years - NorCal Sierras, Webber Dual-Banders, Fireflys, NoGA Pigs, etc. etc. all the way back to my first Heathkit (HW-12A), and I can honestly say that Hans and his team have proven themselves time and again over this last decade.  Proven designs. Proven quality. Proven dedication - to design new hardware, code software, debug and optimize their products, source and kit them at reasonable cost, and to promote and support these kits with depth, vigor, and genuine love of the radio arts. 

Hans, I don't know what your sales ratio is between kits, or how it varies over time, nor how intertwined your supply chain is between products. I do, however, know what the risks are when an organization is pushed to grow, or produce product, beyond its organic capacity to do so -- inevitably either quality or innovation are sacrificed in the push for "MORE". As a professional systems engineer, I have "taken the ride up" with several big tech companies, and I've personally experienced how that "MORE" mentality can derail or even kill a company.
Thus I say, don't change a thing. 

Thanks and warmest 73,
Chuck


Re: How about a QSX

Chuck, N1KGY
 

Hans,
Your stuff upper lip is world class, as are your kits. :)
I've said it before and I say it now - don't change a thing about QRP Labs. Please. 
In context: I just purchased my 7th kit from QRP Labs, owning now 2x U3S w/QLG1 each, a QCX40, and a Progrock (my original U3 having recently been retire by ESD/lightening), and I expect I'll buy at least that many more in coming years.
I've bough and built radio kits from at least a dozen other outfits over the years - NorCal Sierras, Webber Dual-Banders, Fireflys, NoGA Pigs, etc. etc. all the way back to my first Heathkit (HW-12A), and I can honestly say that Hans and his team have proven themselves time and again over this last decade.  Proven designs. Proven quality. Proven dedication - to design new hardware, code software, debug and optimize their products, source and kit them at reasonable cost, and to promote and support these kits with depth, vigor, and genuine love of the radio arts. 

Hans, I don't know what your sales ratio is between kits, or how it varies over time, nor how intertwined your supply chain is between products. I do, however, know what the risks are when an organization is pushed to grow, or produce product, beyond its organic capacity to do so -- inevitably either quality or innovation are sacrificed in the push for "MORE". As a professional systems engineer, I have "taken the ride up" with several big tech companies, and I've personally experienced how that "MORE" mentality can derail or even kill a company.
Thus I say, don't change a thing. 

Thanks and warmest 73,
Chuck


Re: QCX+ wishlist - wire tilt bail DIY

K7CTQ
 

QCXs Got Legs


I made my 'fold unders'  from 1/2" aluminum angle. Less than an hour's work.


Re: QCX+ wishlist - wire tilt bail DIY

Mike Besemer - WM4B
 

A piece of angle aluminum laid with the 90 degree angle upward works very well to tilt the front upward.

Mike
WM4B

On Jun 8, 2020 3:39 PM, Brien Pepperdine <brianpepperdine@...> wrote:

Sorry for the formatting below, but I pulled this off an archive.

The wire bail has been discussed on and off on the Elecraft list since the option for the K1 rig was not available for long. This outlines making your own. Looking at my QCX here in the BAMA Tech case I can see the wires could be easily be incorporated into the screws for the back feet using some ingenuity. I am thinking for instance those wire holders that are essentially a loop with flattened ends where the screw is put through.

Here is the DIY outline.


"The Never Fail Cheap & Dirty K1 Bail"; (with apologies to Tom, =N0SS, and his probe) Take a piece of 15" long by 3/32 – 1/8" diameter sol=id wire (a heavy duty coat hanger works great!). Slide two 1/2" X 1/8" ID=vacuum hose (any auto parts store) to the middle of the wire. Starting f=rom the middle measure 2-5/8" each way and bend 90 degrees. You now have =a square “U”, with the base measuring 5-1/4". From the corners of the “U”=measure 3-1/2“ and bend 90 degrees so that if the ”U" is sitting on a ta=ble the two bends you just made would stick straight UP from the table. N=ow, measure from those just completed bends 1-1/4" and make a 90 degree b=end such that the ends of the wire are now facing each other. Clip the en=ds of the wire about 3/8" away from the just completed bends. These littl=e stubs will fit into the screw holes on the K1 that are designed for the=tilt stand. When you first complete this stand take the top cover off to=ensure that there are no interf
 erence's with the KNB1 or the KBT1 when t=he stand is installed. Trim accordingly. Slide the two rubber hose pieces=to the corners. These will act as the feet of the stand. This compact stand can be flipped beneath the radio and the bottom of the=bail can snapped against the rear of the radio and beneath the antenna j=ack for stowage. To use simply flip the stand forward and use a rubberband mounted three-quarters the way up the parallel arms to secure the radio=at the desired viewing angle.    

---------- Original Message ----------
From: Roger Hill <rhill@...>
Date: June 8, 2020 at 9:54 AM

It seems to me that a wire bail, so that the case can be tilted upwards for easier viewing, would be a useful addition to the list of options for the QCX+.

73
Roger
G3YTN


 


Re: QCX 40 meter build help, 700 HZ tone shows up in weird place... #40m #si5351a

James Daldry W4JED
 

Hi, Mark

1380 ohms? Something is leaky, and that something won't act like a capacitor. Most likely one of the low pass filter caps is punctured and that is allowing the RF to arc to ground. If I was troubleshooting it I would unhook one filter coil lead at a time until I determined which capacitor had the problem. The coils can easily be unsoldered one end at a time. Not so much the caps. Safe (not tearing up the board) removal of a small ceramic cap pretty much requires crushing the cap with pliers, then desoldering the leads 1 at a time. Have fun.

73

Jim W4JED

On 6/8/20 12:40 PM, Mark Garrisi via groups.io wrote:
Hi James;

     I've check C29 to center pin on antenna jack, and yes, full continuity.  1380 Ohms from pin to ground, 1.5 ohms from center pin to board pin.  I'm almost calling it quits...


Re: QCX+ wishlist - wire tilt bail DIY

Brien Pepperdine
 

Sorry for the formatting below, but I pulled this off an archive.

The wire bail has been discussed on and off on the Elecraft list since the option for the K1 rig was not available for long. This outlines making your own. Looking at my QCX here in the BAMA Tech case I can see the wires could be easily be incorporated into the screws for the back feet using some ingenuity. I am thinking for instance those wire holders that are essentially a loop with flattened ends where the screw is put through.

Here is the DIY outline.


"The Never Fail Cheap & Dirty K1 Bail"; (with apologies to Tom, =N0SS, and his probe) Take a piece of 15" long by 3/32 – 1/8" diameter sol=id wire (a heavy duty coat hanger works great!). Slide two 1/2" X 1/8" ID=vacuum hose (any auto parts store) to the middle of the wire. Starting f=rom the middle measure 2-5/8" each way and bend 90 degrees. You now have =a square “U”, with the base measuring 5-1/4". From the corners of the “U”=measure 3-1/2“ and bend 90 degrees so that if the ”U" is sitting on a ta=ble the two bends you just made would stick straight UP from the table. N=ow, measure from those just completed bends 1-1/4" and make a 90 degree b=end such that the ends of the wire are now facing each other. Clip the en=ds of the wire about 3/8" away from the just completed bends. These littl=e stubs will fit into the screw holes on the K1 that are designed for the=tilt stand. When you first complete this stand take the top cover off to=ensure that there are no interf
 erence's with the KNB1 or the KBT1 when t=he stand is installed. Trim accordingly. Slide the two rubber hose pieces=to the corners. These will act as the feet of the stand. This compact stand can be flipped beneath the radio and the bottom of the=bail can snapped against the rear of the radio and beneath the antenna j=ack for stowage. To use simply flip the stand forward and use a rubberband mounted three-quarters the way up the parallel arms to secure the radio=at the desired viewing angle.    

---------- Original Message ----------
From: Roger Hill <rhill@...>
Date: June 8, 2020 at 9:54 AM

It seems to me that a wire bail, so that the case can be tilted upwards for easier viewing, would be a useful addition to the list of options for the QCX+.

73
Roger
G3YTN


 


Re: QCX+ wishlist

ajparent1/KB1GMX
 

Me I'm inclined to ask how much would you pay for that?

Then again If I need one there are places to find them.  One
of my favorites is McMAster-Carr.  Also some creativity.

Allison
-------------------------------
Please reply on list so we can share.
No private email, it goes to a bit bucket due address harvesting


Re: QCX+ wishlist

Arv Evans
 

Roger

For those with a bit of mechanical skill, a flip-up or flip-down bail should 
be rather easy to design and build.  The bail itself could be just a length 
of coat-hanger wire bent into shape.  Real task might be to design, build, 
and install the bail mounting bracket.  A quick on-line search indicates 
that there are several ways to do this.  

Alternative approach might be to salvage the flip-down feet from a dead 
or unwanted keyboard and install those on the chassis bottom.  This 
could involve cutting out the foot mounting area and gluing it to the bottom 
of your chassis.  

For my own use I usually run a 6-32 screw through the chassis bottom 
and screw a wire-nut onto it.  That is not flippable, but works for non-
portable use.  

Arv
_._


Arv
_._


On Mon, Jun 8, 2020 at 11:48 AM Roger Hill <rhill@...> wrote:
Hi Arv. Yep. I was thinking one for the QCX+ specifically would be good, maybe with holes pre-drilled (obviously not in this first batch).
Roger
G3YTN

On 8 Jun 2020, at 13:36, Arv Evans <arvid.evans@...> wrote:

On Mon, Jun 8, 2020 at 8:07 AM Roger Hill < rhill@...> wrote:
It seems to me that a wire bail, so that the case can be tilted upwards for easier viewing, would be a useful addition to the list of options for the QCX+.

73
Roger
G3YTN


Re: QCX+ wishlist

Roger Hill
 

Hi Arv. Yep. I was thinking one for the QCX+ specifically would be good, maybe with holes pre-drilled (obviously not in this first batch).
Roger
G3YTN

On 8 Jun 2020, at 13:36, Arv Evans <arvid.evans@...> wrote:

On Mon, Jun 8, 2020 at 8:07 AM Roger Hill < rhill@...> wrote:
It seems to me that a wire bail, so that the case can be tilted upwards for easier viewing, would be a useful addition to the list of options for the QCX+.

73
Roger
G3YTN


Re: QCX+ wishlist

Arv Evans
 

On Mon, Jun 8, 2020 at 8:07 AM Roger Hill <rhill@...> wrote:
It seems to me that a wire bail, so that the case can be tilted upwards for easier viewing, would be a useful addition to the list of options for the QCX+.

73
Roger
G3YTN


Beep in TX

Eng. Fabio Barroso <fbbrito@...>
 

Hi builders,

My QCX for 40m have a unpleasant beep, like switching, during the transmission, my board is Rev 5, and firmware is 1.04. Any suggestions?

Tks, 73
--
Fábio Barroso Brito
Engenheiro de Telecomunicações
CREA 061787033-0 


Re: Upgrading firmware on the QCX to Ver 1.05 ....where is the .hex file

Bill Cromwell
 

Hi,

The file is here:

https://groups.io/g/QRPLabs/files/Firmware%20for%20QCX%20kit/1.05

73,

Bill KU8H

bark less - wag more

On 6/8/20 12:50 PM, Julian Opificius wrote:
Unless I'm mistaken, Mike, that page only gives you the opportunity to purchase a chip, not to download the hex file.
I could, of course, have missed the link and be wrong :-)
Julian N4JO
On 6/8/2020 11:41 AM, Mike Besemer - WM4B wrote:
You have to go to the QRP-labs 'shop' site.

Mike
WM4B
On Jun 8, 2020 12:07 PM, Julian Opificius <@julianop> wrote:

You're welcome Kees. I just happened to catch a glance at my
inbox, and I happened to remember where the announce was :-) It
was announced on this forum upon the formal release of the final
version, back on 8th May. I'm not sure there is a link anywhere on
the qrp-labs.com website, though.

Julian, N4JO.

On 6/8/2020 10:35 AM, Kees T wrote:

Thanks Julian, that was fast. I looked all over the QRP Labs
website (or so I thought). Where was it hiding ?

73 Kees K5BCQ


Re: Upgrading firmware on the QCX to Ver 1.05 ....where is the .hex file

Mike Besemer - WM4B
 

You're right. It's in the file section of the groups. IO page.

Mike
WM4B

On Jun 8, 2020 12:49 PM, Kees T <windy10605@...> wrote:
Mike,

All I see there is the programmed ATMega328P for sale with the new Ver 1.05 firmware. I don't see a link to the .hex code if you want to re-load your existing ATMega328P.

73 Kees K5BCQ


Re: Link to QCX Ver 1.05 firmware for upgrading

Ronald Taylor
 


On Mon, Jun 8, 2020 at 8:22 AM Kees T <windy10605@...> wrote:
Finally received my USBISP AVR programmer and would like to upgrade from a previous firmware level. Where does Hans have the .hex file available ?

73 kees K5BCQ


Re: Upgrading firmware on the QCX to Ver 1.05 ....where is the .hex file

RACHAEL SANDERS
 

They’re held in the files section........just seen them
Rachael M1AYG 


On 8 Jun 2020, at 17:55, Rachael Sanders <m1ayg.rachael@...> wrote:

Found this on the shop site guys!

The firmware version files are hosted by the QRP Labs groups.io forum.


On 8 Jun 2020, at 17:50, Julian Opificius <n4jo@...> wrote:



Unless I'm mistaken, Mike, that page only gives you the opportunity to purchase a chip, not to download the hex file.

I could, of course, have missed the link and be wrong :-)

Julian N4JO

On 6/8/2020 11:41 AM, Mike Besemer - WM4B wrote:
You have to go to the QRP-labs 'shop' site.

Mike
WM4B
On Jun 8, 2020 12:07 PM, Julian Opificius <n4jo@...> wrote:

You're welcome Kees. I just happened to catch a glance at my inbox, and I happened to remember where the announce was :-) It was announced on this forum upon the formal release of the final version, back on 8th May. I'm not sure there is a link anywhere on the qrp-labs.com website, though.

Julian, N4JO.

On 6/8/2020 10:35 AM, Kees T wrote:
Thanks Julian, that was fast. I looked all over the QRP Labs website (or so I thought). Where was it hiding ?

73 Kees K5BCQ


Re: Upgrading firmware on the QCX to Ver 1.05 ....where is the .hex file

Hans Summers
 

Firmware is in the group files see:

https://groups.io/g/QRPLabs/files/Firmware%20for%20QCX%20kit

Which due to space limitations is just a link to the website

73 Hans G0UPL 

On Mon, Jun 8, 2020, 19:50 Julian Opificius <n4jo@...> wrote:

Unless I'm mistaken, Mike, that page only gives you the opportunity to purchase a chip, not to download the hex file.

I could, of course, have missed the link and be wrong :-)

Julian N4JO

On 6/8/2020 11:41 AM, Mike Besemer - WM4B wrote:
You have to go to the QRP-labs 'shop' site.

Mike
WM4B
On Jun 8, 2020 12:07 PM, Julian Opificius <n4jo@...> wrote:

You're welcome Kees. I just happened to catch a glance at my inbox, and I happened to remember where the announce was :-) It was announced on this forum upon the formal release of the final version, back on 8th May. I'm not sure there is a link anywhere on the qrp-labs.com website, though.

Julian, N4JO.

On 6/8/2020 10:35 AM, Kees T wrote:
Thanks Julian, that was fast. I looked all over the QRP Labs website (or so I thought). Where was it hiding ?

73 Kees K5BCQ