Date   
Re: QLG1 Observation

Roger Hill
 

Runs fast and gives 112.5%!

Roger

On 16 Nov 2019, at 13:59, _Dave_K0MBT <davesters@...> wrote:
Mike You made me chuckle
A clock that runs 27/7 ??

On Sat, Nov 16, 2019 at 05:39 AM, Mike wrote:
I have a QLG1 with SMA external aerial. Its running 27/7 .....................
73 Mike
73
Dave
k0mbt
Ham_Made_Keys

Re: QLG1 Observation

_Dave_AD0B
 

Mike You made me chuckle
A clock that runs 27/7 ??

On Sat, Nov 16, 2019 at 05:39 AM, Mike wrote:
I have a QLG1 with SMA external aerial. Its running 27/7 .....................
73 Mike
73
Dave
k0mbt
Ham_Made_Keys

Re: More paddles and keys ...

R2ATQ
 

On Sat, Nov 16, 2019 at 02:13 PM, Ken KM4NFQ wrote:
Thanks for the link to the books.
https://wrsmithclocks.com/books
I join in the gratitude! In Russian, there are almost no such books, and in foreign languages, it does not even come to mind, because you do not guess the existence.

Re: QLG1 Observation

Mike Berg
 

I was able to "fool" my QLG1 into pulsing it's 1PPS LED by putting my finger on the data header when it was powered up.

I assume the inverter IC was reacting the the 60Hz being coupled from my body.

73 Mike N0QBH

QLG1 Observation

Mike
 

I have a QLG1 with SMA external aerial. Its running 27/7 and for the last few
days it has'nt had an antenna connected, yet it occasionally starts producing
1pps pulses that are obviously not synced to anything.
Has anyone else observed this phenomenon ?
73 Mike

Re: More paddles and keys ...

Ken KM4NFQ
 

Hello Eric,

Thanks for the link to the books.
https://wrsmithclocks.com/books

Now I understand why your Bug looks so good.
EricKE6US.png
W.R.Smith was a clockmaker. You have a very good influence.
Unlike you, I am not a big fan of filing and sanding. ;-D

I saw that he had a book about Sherline lathes.
That is about the size of my micro lathe.
I have a Taig micro lathe which I purchased many decades ago.

My very first drawing used round stock instead of rectangular blocks.
paddle.png
But I couldn't find enough brass round stock, so I switched to blocks.
That first design also had smooth brass rod for spring tension and gap adjustment.
I had planned to use a set screw for adjusting spring tension and contact point gap.
I ended up using 8-32 brass screws instead.
I had to tap the parts for 4-40 and 8-32 brass screws.
I only broke on 4-40 tap, while tapping holes for the finger pads.
Luckily, I was able to extract the broken piece from the hole, and tap it with a second tap.

Right now, my brass paddle is functional.
I doubt that it will ever be 'finished'. ;-D

Regards,
Ken, KM4NFQ "Not Fully Qualified"


On Fri, Nov 15, 2019 at 4:47 PM Eric KE6US <eric.csuf@...> wrote:

Thanks, but I'd probably remove a couple fingers. I love to work with hand tools. I even enjoy filing and sanding. They're never a chore for me.

For those interested in homebrew keys, I recommend two books by W.R. Smith, W4PAL. "How to Restore Telegraph Keys" (restoration of a 1914 Vibroplex) and " How to Make a Vertical High Performance Telegraph Speed Key" (his vertical bug design).  I corresponded with the author several times before his death, and learned several valuable lessons. The books are still in print:

https://wrsmithclocks.com/books

Eric KE6US

On 11/15/2019 1:23 PM, Frank wrote:
Eric, I'd love to see what you could with a small lathe and mill !

 Frank  KB4VU
_

Re: QCX firmware upgrade instructions for USBASP and Extreme Burner #qcx #firmware

Mikael Dagman
 

This is a good guide, Extremeburner is the best program looking at its intuitive interface for avrdude compared to others , thats in imho ofc :)

one essential piece of information to ge the usbasp running under win10 is to get the correct driver installed using zadig, use the lib-usbwin32(v1.2.6.0) driver - se picture

also drop this chips.xml in (unrar first) "C:\Program Files\eXtreme Burner - AVR\Data"  or just ad this to the chips.xml
 
-<CHIP>
 
<NAME>ATmega328P</NAME>
 
<FLASH>32768</FLASH>
 
<EEPROM>1024</EEPROM>
 
<SIG>0x000F951E</SIG>
 
<PAGE>64</PAGE>
 
<LFUSE layout="2">YES</LFUSE>
 
<HFUSE layout="5">YES</HFUSE>
 
<EFUSE layout="4">YES</EFUSE>
 
<LOCK>YES</LOCK>
 
<CALIB>YES</CALIB>
 
<PLACEMENT>.\Images\Placements\ZIF_DIP_40.bmp</PLACEMENT>
 
</CHIP>
 
 
-<CHIP>
 
<NAME>ATmega328PB</NAME>
 
<FLASH>32768</FLASH>
 
<EEPROM>1024</EEPROM>
 
<SIG>0x0016951E</SIG>
 
<PAGE>64</PAGE>
 
<LFUSE layout="2">YES</LFUSE>
 
<HFUSE layout="5">YES</HFUSE>
 
<EFUSE layout="4">YES</EFUSE>
 
<LOCK>YES</LOCK>
 
<CALIB>YES</CALIB>
 
<PLACEMENT>.\Images\Placements\ZIF_DIP_40.bmp</PLACEMENT>
 
</CHIP>

Re: More paddles and keys ...

Eric KE6US
 

Thanks, but I'd probably remove a couple fingers. I love to work with hand tools. I even enjoy filing and sanding. They're never a chore for me.

For those interested in homebrew keys, I recommend two books by W.R. Smith, W4PAL. "How to Restore Telegraph Keys" (restoration of a 1914 Vibroplex) and " How to Make a Vertical High Performance Telegraph Speed Key" (his vertical bug design).  I corresponded with the author several times before his death, and learned several valuable lessons. The books are still in print:

https://wrsmithclocks.com/books

Eric KE6US

On 11/15/2019 1:23 PM, Frank wrote:
Eric, I'd love to see what you could with a small lathe and mill !

 Frank  KB4VU

Re: More paddles and keys ...

Frank
 

Eric, I'd love to see what you could with a small lathe and mill !

 Frank  KB4VU

Re: Unnecessarily high QCX Brown-out reset voltage? #qcx

Torbjorn Skauli
 

I finally installed the new chip with lower brown-out voltage threshold today. At the same time I installed a 2200 uF/6.4V capacitor across the output of the 5 volt regulator into my 3D printed QCX cabinet (filling the last remaining volume in there: https://groups.io/g/QRPLabs/topic/31672996). This clearly has the desired effect: I can now rotate the break-before-make power switch to turn the GPS off while keeping the processor alive. This enables the following use case:
- Set up the QCX in a convenient indoor location with no GPS coverage
- Enable practice mode and WSPR beacon
- Disconnect from antenna temporarily and move the QCX in a location with GPS coverage
- Leave it on with GPS enabled until GPS PPS is flashing AND WSPR completes a cycle, so that time, frequency and locator are set automatically
- Turn the power switch one click to disable GPS
- Bring the QCX back indoors and connect the antenna
- Disable practice mode, and let WSPR run

It may look complicated, but is actually easy as long as the QCX is a complete unit with battery. This will surely help to get WSPR running correctly in new places without having to look up the right locator and get the clock set right manually. Not least, this is useful when showing off the magic of WSPR to other people, for example at exhibits of ham radio.

Thanks again, Hans.

  Torbjorn, LA4ZCA

Re: #qcx Firmware version 1.02 release #qcx

Hans Summers
 

Thanks Geoff

But please use 1.02b which is the latest version!

73 Hans G0UPL 

On Fri, Nov 15, 2019, 23:37 GD <lowemmission@...> wrote:
Hans, programmed 40M QCX this evening with ver T1.02a , appears good with this version.

 73 Geoff
                G4CAO

Re: #qcx Firmware version 1.02 release #qcx

GD
 

Hans, programmed 40M QCX this evening with ver T1.02a , appears good with this version.

 73 Geoff
                G4CAO

Re: BPF Filter question #bpf

 

For info, atmospheric noise in a 2.5Khz window on 80m is about -100dbm or -111dbm in a CW window.
At 28Mhz that becomes -120dbm and -130dbm.

I think most rx's have more than enough gain to compensate for a few db lost in a filter especially at LF.

Spreadsheet for this stuff, and more is here www.qsl.net/g0ftd/other/misc/


73 de Andy

Re: newly built QCX not working. #qcx40 #qcx

Fast hosts
 

now working and the odd things on boot up solved by a factory reset.. now for some setting up

Re: newly built QCX not working. #qcx40 #qcx

Fast hosts
 

Update... it suddenly started working so might have ben an oxidised contact surface somewhere I cleaned by removing/replacing.
However the boot screen is normal ie "5w CW Tcvr 1.01A QRP labs 2019" but this goes straight to a screen showing "A24,910,00" no select band screen. This is the 40metre version so that VFO is totally wrong although, of course, I should have been offered the opportunity to select my band?

Re: newly built QCX not working. #qcx40 #qcx

Fast hosts
 

OK, so when I use an antenna on the SDR I get the 20k oscillator signal proved by turning on and off the QCX. so is it pointing now towards the microcontroller more?

Re: newly built QCX not working. #qcx40 #qcx

Bill Cromwell
 

I agree with Alan, a scope is not needed for everything and there are methods that don't require a scope even when a scope might be useful (if you have one). There are also times when a scope can even be misleading or detrimental. On the other hand, if you also do not have another receiver that can detect the frequencies of interest that method will obviously not help. Perhaps some of the hams building these radios do not have any other receiver or more likely do not have one that covers the frequencies of interest. The first, most important tool is a reliable DMM, DVM, VTVM (all the same tool) and knowing how to use it. Please notice that I used 'reliable' and not that overused word 'accurate'. 'Accurate' comes in degrees and graduations and shades or grey while reliable is absolute. It is reliable or not. After that, voltage, resistance, current readings are useless if you don't have some idea what those readings should be. In early 1952 I didn't know about any of that stuff either, just like people starting new today. But I started then and I am still learning, even if I can already find my way around in activities of various kinds. The underlying principle is "critical thinking" and that needs frequent sharpening and honing. But is is fun:)

Enjoy the journey and..

73,

Bill KU8H

On 11/15/19 12:24 PM, Alan G4ZFQ wrote:
I get just the top row of squares in the display. Following the suggestions, I checked all solder connections on the microcontroller socket and pulled the chip to find all pins were straight and seating properly.
Keith

I have a small Chinese DSO138 oscilloscope but i am not au fait with using it to measure the oscillator output at pins 9 and 10 as suggested.
All you need do is put the probe on the pin. The scope just needs to show a signal is there. The problem is that a scope might kill the oscillation.. If that happens have you a radio to listen around 20MHz?
I'm not sure I like Hans' troubleshooting in so far as it puts a lot of emphasis on a scope. Most faults can be found without one, a scope sometimes makes it easier. I've scopes but still do not use one very much.
You have checked voltages?
73 Alan G4ZFQ

I am not inexperienced in kit building, having built the UBITX successfully and several small Chinese radio kits.
I know Hans says always suspect the component last but I am thinking I may have a duff microcontroller..
Any suggestions are more than welcome
 M6OLP 73
--
bark less - wag more

Re: BPF Filter question #bpf

Hans Summers
 

Hi Jack

The 80m filter has plenty of bandwidth to cover the whole band.

If you do happen to want it wider this can be achieved by using a slightly larger coupling capacitor between the two tuned circuits, this is covered in the manual. 

73 Hans G0UPL 

On Fri, Nov 15, 2019, 17:18 Jack Brabham - KZ5A <kz5a@...> wrote:
I am considering building a 10 band BPF filter set to function as front end filtering for an Afedri SDR. The filters all look good for this purpose except the 80M filter which appears to run out of bandwidth before getting to 3885.   80M digital is a priority as well as is the AM window around 3885.   So... I'm wondering if  someone has worked out a mod for a 75M filter?   I would just drop the 60M filter and have seperate filters for 75M and 80M in the 10 band set.

73 Jack KZ5A

Re: BPF Filter question #bpf

Ronald Taylor
 

Hi Jack. According to the specifications on this filter, it has a 3 dB bandwidth of 465 kHz on 80 meters. You should be able to see from the digital segment to the AM segment with no more than 3 dB additional loss from the center. You should be able to peak the filter somewhere between those two band segments and come pretty close to those numbers. Of course, if you want the filter to have minimum loss at both band segments, you will need to use two separate filters as you mentioned.

Good luck … Ron

On Fri, Nov 15, 2019 at 7:18 AM Jack Brabham - KZ5A <kz5a@...> wrote:
I am considering building a 10 band BPF filter set to function as front end filtering for an Afedri SDR. The filters all look good for this purpose except the 80M filter which appears to run out of bandwidth before getting to 3885.   80M digital is a priority as well as is the AM window around 3885.   So... I'm wondering if  someone has worked out a mod for a 75M filter?   I would just drop the 60M filter and have seperate filters for 75M and 80M in the 10 band set.

73 Jack KZ5A

Re: newly built QCX not working. #qcx40 #qcx

Fast hosts
 

I do have aN RSP1A SDR which I guess I could use...