Date   
Re: Real time clock Display?

Hans Summers
 

Hi Mike

It would be possible. The real time clock would have to be set though every time you power up. Doesn't that make it unattractive?

73 Hans G0UPL 

On Sep 27, 2017 1:53 PM, <mike@...> wrote:
Hallo Hans,
would it be possible to show the real time in the display? For example in the right bottom corner when the CW decoding is switched off?
73 Mike, DJ9BX

Re: Programming atmega with qcu rev 3 board

Mike Bowthorpe
 

Hi John/James

This link may provide some useful info.......

http://www.fischl.de/usbasp/

73
Mike
G0CVZ

Re: QCX LCD size

John PD7MAA
 

Re: AGC

John Kirby
 


Here is a hardware solution..(an AVC circuit (lower right yellow stickie)) I used for better audio control on the NE-40/40 then later added a 386 post amp (top yellow stickie) volume control and speaker driver. The diodes are 1n4148, but do not remember if other component values were my final choice. Best I know (or remember from early 1990s)/(retired EE 1997) this mod is my original idea.

Schematic in Photos File with my call.

John
N3AAZ

QCX LCD size

barry NF1O
 

I am awaiting my QCX and looking to Box mount it. Does anyone have a size layout for the LCD so I can prep the front and rear panels? I can figure out the other holes but the Display is not obvious. also does a decorative bezel come with it or is one available?

Thanks

Barry

NF1O

Re: Programming atmega with qcu rev 3 board

James Anderson
 

Hi John. 

It's been a few months since I used it but seem to remember that the U3S needs to be powered up..
I'm fairly sure of this. 

If you have the extra relay band board then this needs to be removed from the U3S otherwise it can cause relay chatter on the line that messes with the programming. 

If like me you're using the USBASP dongle and the ten way to six way adaptor, you might have an issue with the dongle being recognised. 
There's another piece of software called Zadig that will automatically with the press of a few option buttons install the driver for the USBASP dongle so that it'll appear on your PC. I use windows 10 successful with this. 

I'm no expert and have only dabbled with the programming but have managed to upgrade/downgrade the chips using the USBASP and AVRDUDESS. 

I've also managed to "brick" the chip before now messing about with the fuse settings out of curiosity but even then recovered the chip by making a "high voltage programmer" circuit to factory reset the chip. 
Again, my memory fails me as to the circuit but if you google it you should find it. 
I made one on a vero board and it worked brilliantly to recover my curious tinkering. I bought several atmega328p chips off the web months ago to practise on. 

I'll help where I can. Kindest. James. 


On 28 Sep 2017, at 06:53, James Anderson <james21170@...> wrote:

That's basically it John. 
It's how I've done it in the past. 

Just be careful as to which way round   you connect to the six way header pins as it's not keyed. Meaning it'll go on either way round so just check the connecting pins well before hand. They are marked up on the PCB and the six way adaptor used to connect them. 

I must admit, I've connected them the wrong way round with no detriment being in a rush. But It's probably better not too Hi Hi. 

Using AVRDUDESS to program it too. 

Regards. James. 

On 27 Sep 2017, at 23:17, radiomanjwt <jwtitmus@...> wrote:


Hi all,
Just a question regarding programming atmega chip with latest wspr firmware using rev 3 board. It has the 6 pins for interfacing to usbasp programmer, i.e miso, sck, rst, vcc, mosi, gnd, so does this mean no mods or cutting tracks as in the pdf are required? Just plug into the header and program? Thanks.
Cheers John de VK4JWT 


Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network

Re: Programming atmega with qcu rev 3 board

radiomanjwt
 

Thanks James, I would like to try and program a blank chip before trying to upgrade the one I have. I actually have 3 different ultimate wspr boards all with different firmware versions. Does the board need to be powered up when programming, or does the chip get vcc from the usbasp?
Sorry I am new to programming these chips, need to get averdudess as well
Cheers 
John de VK4JWT 



Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network

-------- Original message --------
From: James Anderson <james21170@...>
Date: 28/9/17 3:52 pm (GMT+10:00)
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Programming atmega with qcu rev 3 board

That's basically it John. 
It's how I've done it in the past. 

Just be careful as to which way round   you connect to the six way header pins as it's not keyed. Meaning it'll go on either way round so just check the connecting pins well before hand. They are marked up on the PCB and the six way adaptor used to connect them. 

I must admit, I've connected them the wrong way round with no detriment being in a rush. But It's probably better not too Hi Hi. 

Using AVRDUDESS to program it too. 

Regards. James. 

On 27 Sep 2017, at 23:17, radiomanjwt <jwtitmus@...> wrote:


Hi all,
Just a question regarding programming atmega chip with latest wspr firmware using rev 3 board. It has the 6 pins for interfacing to usbasp programmer, i.e miso, sck, rst, vcc, mosi, gnd, so does this mean no mods or cutting tracks as in the pdf are required? Just plug into the header and program? Thanks.
Cheers John de VK4JWT 


Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network

Re: Programming atmega with qcu rev 3 board

James Anderson
 

That's basically it John. 
It's how I've done it in the past. 

Just be careful as to which way round   you connect to the six way header pins as it's not keyed. Meaning it'll go on either way round so just check the connecting pins well before hand. They are marked up on the PCB and the six way adaptor used to connect them. 

I must admit, I've connected them the wrong way round with no detriment being in a rush. But It's probably better not too Hi Hi. 

Using AVRDUDESS to program it too. 

Regards. James. 

On 27 Sep 2017, at 23:17, radiomanjwt <jwtitmus@...> wrote:


Hi all,
Just a question regarding programming atmega chip with latest wspr firmware using rev 3 board. It has the 6 pins for interfacing to usbasp programmer, i.e miso, sck, rst, vcc, mosi, gnd, so does this mean no mods or cutting tracks as in the pdf are required? Just plug into the header and program? Thanks.
Cheers John de VK4JWT 


Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network

Re: AGC

@CurtisM
 

VK3YE has an unusual AGC circuit that features an LED and a light-variable-resistor.  I saw on the web a builder in Europe is planning to try this AGC with his QCX.  I can't imagine it to be a low power function!  also it will take some experimenting, but it sounds nice in a you tube video demonstration. 

But do enjoy your QCX without AGC - I think its more of a need when tuning the band than in most operating. 

I am progressing in my build - now beyond the fixed resistors. 

73 Curt

Re: LM317LZ Regulator Circuit on ProgRock

Robin Midgett
 

Thanks for all the inputs.
3.73V & 5.20V is what I ended up with, operating conditions, I'm satisfied.
No, my meter(s) aren't out of calibration...they agree on the measurements.

On Sun, Sep 24, 2017 at 5:50 AM, Hans Summers <hans.summers@...> wrote:
Hi Alan, all

The LM317 components were chosen to produce a "3.3V" voltage somewhat on the high side, because it helps get a little more power output out of the Ultimate3S PA circuit. 

In the QCX transceiver kit the "3.3V" for the Si5351A comes from two 1N4148 in series to 5V! A little approximate... but it does work just fine!

73 Hans G0UPL 

On Sep 24, 2017 11:02, "Alan G4ZFQ" <alan4alan@...> wrote:


Put the circuit under load, maby a 1000ohm resistor to gnd, and make your measurements again

Actually I think if you use the formula in the LM317 PDF using the typical Adjustment Pin Current of 50uA the voltage calculates to 5.15V.
So the Robin's measured LM317 voltage is not so far out.
The nominal 3.3 is not so easy to calculate but assuming no base current in Q1 and a 0.6V drop in the b-e junction I make it 3.6.
Maybe it will be a little lower, 3.6 volts is the maximum recommended for the Si5351. I think Hans designs it like this.

73 Alan G4ZFQ







Re: 3D printer design for the QCX enclosure?

John Rabson
 

The BBC Micro tended to generate QRM which was reduced by coating the inside of the case with conductive paint.

John F5VLF

On 09/27/2017 08:56 PM, John Sutter wrote:
I've heard people recommend conductive paint and conductive filament.
I've never tried it, but have planned on trying the paint.  The filament is
pricey.

On 9/27/2017 10:58 AM, N7PXY wrote:
I have used duct tape....
Not the common stuff of legend but the metal foil type used in heating ducts. It is thicker than household aluminum foil, has the glue already on it of course, and stays where you put it. Great stuff.

PJH, N7PXY


Re: QCX on WSPR

Tom Clifton
 

Might check voltage at input of low pass filter.  If there is a huge difference in voltage (input to output) it might be the filter is rolling off between  30m and 40m
  Should that be the case, double check the inductors and capacitors. 

Programming atmega with qcu rev 3 board

radiomanjwt
 


Hi all,
Just a question regarding programming atmega chip with latest wspr firmware using rev 3 board. It has the 6 pins for interfacing to usbasp programmer, i.e miso, sck, rst, vcc, mosi, gnd, so does this mean no mods or cutting tracks as in the pdf are required? Just plug into the header and program? Thanks.
Cheers John de VK4JWT 


Sent from my SAMSUNG Galaxy S7 edge on the Telstra Mobile Network

Re: PROGROCK output 10MHz when I started!

SM7ETW Jan
 

It is not in the operating manual. The information about bank select is in the assembly manual.

Jan

Re: PROGROCK output 10MHz when I started!

Robin Midgett
 

Scratch that..I found the bank select info. It's in the ASSEMBLY manual for the ProgRock, not the OPERATING manual.

Re: PROGROCK output 10MHz when I started!

Robin Midgett
 

Hi Hans, et al,
I've downloaded & read the ProgRock operating manuals from http://qrp-labs.com/progrock.html and I don't find a description of using the banks via the binary select mechanism. I'm confident I know how to do it if it's straightforward BCD, but I haven't found the info in the manual.
Am I missing a manual?

Re: 3D printer design for the QCX enclosure?

 

I've heard people recommend conductive paint and conductive filament.
I've never tried it, but have planned on trying the paint.  The filament is
pricey.

On 9/27/2017 10:58 AM, N7PXY wrote:
I have used duct tape....
Not the common stuff of legend but the metal foil type used in heating ducts. It is thicker than household aluminum foil, has the glue already on it of course, and stays where you put it. Great stuff.

PJH, N7PXY

Re: QCX on WSPR

la8uha@...
 

Hi Carlos,
I\ve got the same issue with mine on 20m. With 12V on a dummy load I`m getting abt 1,3W out.  All components are triple checked but will look further into it during the weekend.  

73, Bjarte LA8UHA

Re: 3D printer design for the QCX enclosure?

Mikael Dagman
 

Don't forget you have copper tape as well.

https://www.google.se/search?q=copper+tape&client=ms-android-huawei&prmd=isvn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjlpre--cXWAhVJZlAKHWFbBtUQ_AUIESgB&biw=360&bih=518

Re: 3D printer design for the QCX enclosure?

N7PH
 

I have used duct tape....
Not the common stuff of legend but the metal foil type used in heating ducts. It is thicker than household aluminum foil, has the glue already on it of course, and stays where you put it. Great stuff.

PJH, N7PXY