Date   

Re: How do I adjust the display to the actual TX on QCX?

Alan Richmond
 

Jerry, that is the best ever description of how to adjust your frequency, and in so few words. Are you a lawyer?
Your description deserves to be inserted in the manual.

Well done.

Alan
GU3ONJ


On Wed, Jan 2, 2019 at 11:54 AM, Jerry Gaffke wrote:
Yup, that has something to do with it.

As Alan said in post 29847, "The 27MHz frequency must be reduced in proportion to  the frequency you are using."
That's because the si5351 creates a 7mhz clock by using what comes down to integer dividers and multipliers.
Exactly how it does this is best left to another thread.
So the 7mhz clock is a strict ratio of the si5351's  27mhz crystal reference oscillator.

The ratio of 27mhz vs your 7mhz operating frequency is 27/7.
If you see a 400hz error at 7mhz, then the 27mhz reference must be adjusted by  400hz*27/7 = 1543hz.

Jerry, KE7ER


Re: New Sick 40M QCX

Alan G4ZFQ
 

It was two rows
Don,

That means the processor is alive, has initialised it.
If R47 gives a smoothly varying voltage then you seem to have done all the continuity/short circuit tests. I can't think of anything the troubleshooting does not cover.

73 Alan G4ZFQ


Re: Extra parts in my OCXO/Si5351A synthesizer module kit #synth #ocxo #si5351a

Hans Summers
 

Hi All

There was a special run of 10MHz OCXO variants of the kit, at some point a couple of years ago. 100 were produced without Si5351A; and instead of the 27MHz crystal they had 10MHz, and 150pF capacitors instead of 56pF. I still have a handful left here. 

In only one or two cases, there was a point where we ran out of the OCXO kit and the next batch was days away from arriving here. So I got some of those old 10MHz OCXO kits and added a 27MHz crystal and the 56pF capacitors, and swapped over to a board with the Si5351A on it. Really this must have been literally only 1 or 2, I can't remember. So John - I believe this is the explanation - you are just the one or two! 

73 Hans G0UPL

On Thu, Jan 3, 2019 at 1:35 AM John Canfield <bucket@...> wrote:
I think one of the other kits in my Q3S Ultimate package also had a 10 Mhz crystal. A bonus!


--
John, WB5THT


Re: Thank you...

Hans Summers
 

Hi Dave
 
I'm looking forward to seeing you again at FDIM this year.

Looking forward to it also! 
 
It would be real treat to see you present your QSX technical details, like you did for the QCX last year.

Well, I note that the speaker list for FDIM has not been published yet. But... 

73 Hans G0UPL


Re: QRSS New Year's Eve Celebration!

Mark
 

Thank You Hans!  I look forward to your update following some time on the air with it.  I too have a the 12m Spiderbeam mast, but alas the Model 404 is out of stock here in the US for the time being.  Note, I cannot imagine being able to throw one side of the antenna over my neighbor’s roof here at my QTH!  You have very accommodating neighbors.

Mark 


Re: Shack clock out of date

KI7MWA
 

Nope, that's not it either.  With the local time offset set to -480 (that's minus four hundred eighty) minutes, and the first line set to display local date and time, the date rolls over at 4:00pm local time (in the case of today, the 2nd of January, the first line displayed "01Jan19" until 4:00pm local, when it changed to "02Jan19").  With the offset set to +960, the local date shows 03, instead of 02.


Re: New Sick 40M QCX

Don Huffstetler <wa6ouw@...>
 

It is version 4
 
Don
wa6ouw
 
 

-----Original Message-----
From: Kurt Zimmerman <kurt@...>
To: QRPLabs <QRPLabs@groups.io>
Sent: Wed, Jan 2, 2019 12:17 pm
Subject: Re: [QRPLabs] New Sick 40M QCX

Good day Don;
  Which circuit board version do you have?  (printed lower right corner
of the board).

73;
Kurt - W2MW

-------- Original Message --------
Subject: [QRPLabs] New Sick 40M QCX
From: "Don Huffstetler via Groups.Io" <wa6ouw=aol.com@groups.io>
Date: Wed, January 02, 2019 2:09 pm




-----Original Message-----
From: Don Huffstetler <wa6ouw@...>
To: qrp-labs <qrp-labs@groups.io>
Sent: Wed, Jan 2, 2019 11:07 am
Subject: New Sick 40M QCX

  Happy New Year QRPers in the Group!

Bought and assembled my Christmas present which was a QCX /40M that came
from Turkey with a chassis kit!

I assembled it over the holidays and was so disappointed in the outcome.

With power, dummy load, keyer paddle and earphone in place I turned on
my power supply (RS-7, 5 Amp, 13.8V) and got a

Big Bright LCD with nothing but white squares on it.  I know R47 is in
play because it goes from the squres to a

blank screen when I try to adjust. The kit is a Rev 4 and the 28 pin/IC2
is Version F

I did everything mentioned in the QCX/Trouble, but nothing changed. I
even looked for shorts on IC1.  After checking all the pins

including reflowing the pins/pads, it almost looks like the 28 pin is
dead, not responding or not communicating.

I am not a Electrical Engineer, but I do own and run
Kitbuilderssoldering.com with kit building

experience since joining NorCal in 1994.  I will contiinue to look at
this problem and hope that I

have a break thru..................

73's

Don Huffstetler
wa6ouw








Re: New Sick 40M QCX

Don Huffstetler <wa6ouw@...>
 

Hi Alan
 
It was two rows
 
Don
wa6ouw
 
 

-----Original Message-----
From: Alan G4ZFQ <alan4alan@...>
To: QRPLabs <QRPLabs@groups.io>
Sent: Wed, Jan 2, 2019 12:01 pm
Subject: Re: [QRPLabs] New Sick 40M QCX

> Big Bright LCD with nothing but white squares on it.

  Don,

One row or two?

73 Alan G4ZFQ




Re: Extra parts in my OCXO/Si5351A synthesizer module kit #synth #ocxo #si5351a

John Canfield <bucket@...>
 

I think one of the other kits in my Q3S Ultimate package also had a 10 Mhz crystal. A bonus!


--
John, WB5THT


Re: Thank you...

Dave New, N8SBE
 

Hans,

Happy New Year to you, also.

I'm looking forward to seeing you again at FDIM this year.

It would be real treat to see you present your QSX technical details, like you did for the QCX last year.

73,

-- Dave, N8SBE

-------- Original Message --------
Subject: [QRPLabs] Thank you...
From: "Hans Summers" <hans.summers@...>
Date: Mon, December 31, 2018 6:33 pm
To: qrplabs@groups.io


Dear 'Labbers

Thank you for a wonderful year, 2018 was bigger and more fun than ever before. Thank you for your understanding, patience, support, encouragement and and and. Together let's make 2019 even bigger, even better and even more fun!

Remember...
Not all that "cannot be done", can't be done.
Difficult, is not impossible.
Be bold.
Fear nothing. 
Never quit.

Happy New Year 2019

73 de Hans G0UPL and QRP Labs team


Re: Band choice QCX

Paul Harrison
 

Hey Jim,

Now you have scared me, what is a "brain f**t"? i have never heard of this, is it contagious? 

Paul DJ0CU

On Wed, Jan 2, 2019, 21:26 James Daldry W4JED <jim@... wrote:

Hi, Luc

I ordered an 80 meter kit and built it using the 40 meter instructions. I now have a 40 meter radio. The differences are the capacitors in the LPF, whether the BPF trimmer gets a parallel capacitor, and the number of turns on the coils. I had wanted the 40 meter, but had a brain f**t while ordering. Happens occasionally when you are past 70 years old.


Jim Daldry W4JED

On 1/2/19 11:22 AM, LUC VLECKEN wrote:
Hello to the group,

I am about to start on a QCX (ordered for 60m band).
Question: is it preprogrammed only for one particular band? Or can it be altered to another band by its settings (and the according caps and values for the coils then naturally).

Thanks in advance for your reply
and kind regards and all the best for 2019 to all!

Luc Vlecken ON4ALV
+32473201069
 



Re: Band choice QCX

James Daldry W4JED
 

Hi, Luc

I ordered an 80 meter kit and built it using the 40 meter instructions. I now have a 40 meter radio. The differences are the capacitors in the LPF, whether the BPF trimmer gets a parallel capacitor, and the number of turns on the coils. I had wanted the 40 meter, but had a brain f**t while ordering. Happens occasionally when you are past 70 years old.


Jim Daldry W4JED

On 1/2/19 11:22 AM, LUC VLECKEN wrote:
Hello to the group,

I am about to start on a QCX (ordered for 60m band).
Question: is it preprogrammed only for one particular band? Or can it be altered to another band by its settings (and the according caps and values for the coils then naturally).

Thanks in advance for your reply
and kind regards and all the best for 2019 to all!

Luc Vlecken ON4ALV
+32473201069
 



Re: New Sick 40M QCX

Kurt Zimmerman
 

Good day Don;
Which circuit board version do you have? (printed lower right corner
of the board).

73;
Kurt - W2MW

-------- Original Message --------
Subject: [QRPLabs] New Sick 40M QCX
From: "Don Huffstetler via Groups.Io" <wa6ouw=aol.com@groups.io>
Date: Wed, January 02, 2019 2:09 pm
To: qrplabs@groups.io




-----Original Message-----
From: Don Huffstetler <wa6ouw@aol.com>
To: qrp-labs <qrp-labs@groups.io>
Sent: Wed, Jan 2, 2019 11:07 am
Subject: New Sick 40M QCX

Happy New Year QRPers in the Group!

Bought and assembled my Christmas present which was a QCX /40M that came
from Turkey with a chassis kit!

I assembled it over the holidays and was so disappointed in the outcome.

With power, dummy load, keyer paddle and earphone in place I turned on
my power supply (RS-7, 5 Amp, 13.8V) and got a

Big Bright LCD with nothing but white squares on it. I know R47 is in
play because it goes from the squres to a

blank screen when I try to adjust. The kit is a Rev 4 and the 28 pin/IC2
is Version F

I did everything mentioned in the QCX/Trouble, but nothing changed. I
even looked for shorts on IC1. After checking all the pins

including reflowing the pins/pads, it almost looks like the 28 pin is
dead, not responding or not communicating.

I am not a Electrical Engineer, but I do own and run
Kitbuilderssoldering.com with kit building

experience since joining NorCal in 1994. I will contiinue to look at
this problem and hope that I

have a break thru..................

73's

Don Huffstetler
wa6ouw


Re: New Sick 40M QCX

Alan G4ZFQ
 

Big Bright LCD with nothing but white squares on it.
Don,

One row or two?

73 Alan G4ZFQ


Re: How do I adjust the display to the actual TX on QCX?

Jerry Gaffke
 

Yup, that has something to do with it.

As Alan said in post 29847, "The 27MHz frequency must be reduced in proportion to  the frequency you are using."
That's because the si5351 creates a 7mhz clock by using what comes down to integer dividers and multipliers.
Exactly how it does this is best left to another thread.
So the 7mhz clock is a strict ratio of the si5351's  27mhz crystal reference oscillator.

The ratio of 27mhz vs your 7mhz operating frequency is 27/7.
If you see a 400hz error at 7mhz, then the 27mhz reference must be adjusted by  400hz*27/7 = 1543hz.

Jerry, KE7ER


On Tue, Jan 1, 2019 at 05:34 PM, Brian N wrote:
Well, I don't have a GPS module.  So I have been doing data collecting from RBN skims.  To take out the 400 Hz high error I had to dial in 1400 Hz high on the Reference Frequency.  Instead of 27,004,000 it is happy now at 27,005,400.  Seems like a lot of adjustment to take out a 400 Hz error.  But the error is at the 7 MHz band.  The crystal is at 27 MHz.  Maybe that has something to do with it.  Just guessing.  Comments from engineers?  Thanks.

Brian N
N7VKB


Re: Extra parts in my OCXO/Si5351A synthesizer module kit #synth #ocxo #si5351a

Alan de G1FXB
 

You may have inadvertently got some components from Hans personal stash  :-[

I don't recall any current* QRP Labs kits sold that utilise 10MHz Xtals?


Alan

On 02/01/2019 18:43, geoff M0ORE via Groups.Io wrote:

caps with the marking 151 are 150pF, not 0.15pF. Third digit is multiplier or more simply, number of noughts.

Geoff

On 1/2/2019 3:39 PM, John Canfield wrote:
I just finished a second OCXO kit and I freaked out when I found several leftover 151 caps (.15pf). When I looked at the parts list it didn't include these caps so they will go in my parts bin. Also there's an included 10Mhz crystal which obviously isn't used for this application.

Thanks for the extra parts but it was a little confusing :-)

Just got a notice my second Q3S Ultimate kit has shipped. I'm having way too much fun building and it gave me a good excuse to upgrade to a Hakko soldering station, Hakko solder sucker and Vision Luxo magnifying lamp.
--
John, WB5THT


Re: Shack clock out of date

Alan Richmond
 

"Geneva...Greenwich...you know what I mean..."

Ah! So!

The Prime Meridian.


New Sick 40M QCX

wa6ouw@...
 

 
 
 
-----Original Message-----
From: Don Huffstetler <wa6ouw@...>
To: qrp-labs <qrp-labs@groups.io>
Sent: Wed, Jan 2, 2019 11:07 am
Subject: New Sick 40M QCX

Happy New Year QRPers in the Group!
 
Bought and assembled my Christmas present which was a QCX /40M that came from Turkey with a chassis kit!
 
I assembled it over the holidays and was so disappointed in the outcome.
 
With power, dummy load, keyer paddle and earphone in place I turned on my power supply (RS-7, 5 Amp, 13.8V) and got a
 
Big Bright LCD with nothing but white squares on it.  I know R47 is in play because it goes from the squres to a
 
blank screen when I try to adjust. The kit is a Rev 4 and the 28 pin/IC2 is Version F
 
I did everything mentioned in the QCX/Trouble, but nothing changed. I even looked for shorts on IC1.  After checking all the pins
 
including reflowing the pins/pads, it almost looks like the 28 pin is dead, not responding or not communicating.
 
I am not a Electrical Engineer, but I do own and run Kitbuilderssoldering.com with kit building
 
experience since joining NorCal in 1994.  I will contiinue to look at this problem and hope that I
 
have a break thru..................
 
73's
 
Don Huffstetler
wa6ouw


Re: Tech question about intermod( I think)

Simon
 

The rf is amplitude modulated by "ac hum".  

AC is distorted 50Hz due to wide use of switch mode power supply. So, is 100Hz and its distoration, as sideband of falling amplitude, at higher multiple of 100Hz

Try send a constant tone on transmitter, like use tune command. 

Use Audacity software to recird the received af. U should see the amplitude modulation.


On Wednesday, January 2, 2019, Alan G4ZFQ <alan4alan@...> wrote:
Hi all, I feel sure someone commented about this recently but I
https://groups.io/g/QRPLabs/topic/28852652#29661

I have a multiple traces 100Hz apart (twice the mains freq) my tx freq set is 10.139.920 on the dial of the U3S.
I guess its not a problem and not a real  signal being transmitted for others to see.

Possibly not, first you have to check how strong they are compared with your main signal. Easier done by receiving with WSPR or spectrum analiser software (SDR).

You are OK if they are lower by more than 30dB or so. (Depending, ignoring regulations -30dB of 200mW does not normally go far.)
If not check if it is the RX or TX that is producing them. If it is mains hum it can affect either or both.
This is a common occurrence but I've never seen a detailed study of how it happens.

73 Alan G4ZFQ




Re: Extra parts in my OCXO/Si5351A synthesizer module kit #synth #ocxo #si5351a

geoff M0ORE
 

caps with the marking 151 are 150pF, not 0.15pF. Third digit is multiplier or more simply, number of noughts.

Geoff

On 1/2/2019 3:39 PM, John Canfield wrote:
I just finished a second OCXO kit and I freaked out when I found several leftover 151 caps (.15pf). When I looked at the parts list it didn't include these caps so they will go in my parts bin. Also there's an included 10Mhz crystal which obviously isn't used for this application.

Thanks for the extra parts but it was a little confusing :-)

Just got a notice my second Q3S Ultimate kit has shipped. I'm having way too much fun building and it gave me a good excuse to upgrade to a Hakko soldering station, Hakko solder sucker and Vision Luxo magnifying lamp.
--
John, WB5THT