Date   

Re: Problem with BPF

jim
 

return loss bridge

Jim

On Sunday, July 5, 2020, 2:44:46 AM PDT, GM7 <geeemmseven@...> wrote:


Hi Curtis,

Thanks for the suggestion.  I've tried this and tried following the schematic and PCB layout in the manual.  It all seems fine but I found it a tricky circuit to test because most of it is at DC ground due to the secondary windings of the two transformers .

I think it might be a problem with the impedance match on the input or output but I'm not sure how to test that idea.


Re: Change Request.

Mike Besemer - WM4B
 

I did the front and back panel of one of my clocks with my XYL’s Cricut machine.  (Attached.)

 

I used too large a font for the switch labels on the front; I’m redoing it right now.

 

Mike

WM4B

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Don VE3IDS
Sent: Monday, July 6, 2020 6:14 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Change Request.

 

I bought a label maker for $20 that came with a roll of label tape. It has lots of different fonts and borders and sizes and can do double line and vertical mode. I bought a black on clear tape roll for it as well. The supplied one is black type on white. The tape is vinyl and wears well. It works great. 

 

73 Don ve3ids

 

On Mon., Jul. 6, 2020, 4:32 p.m. Bill Cromwell, <wrcromwell@...> wrote:

Hi,

That might help but you could always resort to a label making printer, a
pice of Dyno tape or even use a sharpie to mark it. Use transparent
scotch tape over a printed paper label. How many people are going to be
looking at the back?

73,

Bill  KU8H

bark less - wag more

On 7/6/20 4:03 PM, N3MNT wrote:
> On the surface this may seem like a senseless request, but as i get more
> and more QRP-Labs kits with QRP-Labs enclosures, I find it needed to add
> label for the power requirements so I don't accidentally supply an
> incorrect voltage.  If any changes are made to back panels in the
> future, would it be possible to add the voltage for the power
> connector.  I am so impressed by this kit that I hate  to ask for any
> changes, but this should be an easy one if any future changes are made.
>



Re: Change Request.

Don VE3IDS
 

I bought a label maker for $20 that came with a roll of label tape. It has lots of different fonts and borders and sizes and can do double line and vertical mode. I bought a black on clear tape roll for it as well. The supplied one is black type on white. The tape is vinyl and wears well. It works great. 

73 Don ve3ids

On Mon., Jul. 6, 2020, 4:32 p.m. Bill Cromwell, <wrcromwell@...> wrote:
Hi,

That might help but you could always resort to a label making printer, a
pice of Dyno tape or even use a sharpie to mark it. Use transparent
scotch tape over a printed paper label. How many people are going to be
looking at the back?

73,

Bill  KU8H

bark less - wag more

On 7/6/20 4:03 PM, N3MNT wrote:
> On the surface this may seem like a senseless request, but as i get more
> and more QRP-Labs kits with QRP-Labs enclosures, I find it needed to add
> label for the power requirements so I don't accidentally supply an
> incorrect voltage.  If any changes are made to back panels in the
> future, would it be possible to add the voltage for the power
> connector.  I am so impressed by this kit that I hate  to ask for any
> changes, but this should be an easy one if any future changes are made.
>




Re: ProgRock OCXO and GPS locked frequency accuracy. #qlg1

Thomas Cobb
 

Sorry, left off the Arduino Uno Sketch file - GPS_PPS_Capture.ino
Tom


Re: ProgRock OCXO and GPS locked frequency accuracy. #qlg1

Thomas Cobb
 

Hi Every One
 
I ran across a Arduino Uno Sketch and modified it (Attached Below) , to count my (clone - fake) Arduino board's Crystal's frequency: using a QLG1 GPS's pps output as a 1 second reference.
 
I check 1 of my (fake) Uno Boards, It ran fast,  around 16.005841 Mhz. or  About 1.000365 or about 365us over the 1 second reference.
 
I have a 2rd board, it ran slow, but I couldn't currently,  find it, to Retest it, for it's current Crystal's frequency.
 
The Sketch uses the uP chips counters , So,  if the Sketch is using the counters correctly, the main timing error,  is cause by Crystal's frequency.
 
Don't know if the "REAL" Arduino's use better a Crystal or Not.
 
Every Body -  Stay Safe
 Tom
 

On 5/4/2020 1:49 PM, Hans Summers wrote:
> Hi Mark
> The only thing it is indicative of, is that the Arduino cannot be used for accurate measurements of that nature. 360us is enormous! 
> 73 Hans G0UPL 
> http://qrp-labs.com 
>
>
> On Mon, May 4, 2020, 20:21 Mark Horn <mhorn71@...> wrote:
>
>     Hi Hans, 
>
>     I hooked up an Arduino UNO to the 1PPS from the QLG1 today in an effort to see if I was seeing 1PPS.  
>
>     I wrote a simple little script to trigger on an interrupt rise and then using micros() calculated the time between pulses.   
>
>     volatile unsigned long current_time, previous_time;
>      
>     void setup() {
>       // put your setup code here, to run once:
>      
>       Serial.begin(9600);
>      
>       attachInterrupt (digitalPinToInterrupt(3), pps_interrupt, RISING) ;
>      
>       current_time, previous_time = micros();
>      
>     }
>      
>     void loop() {
>       // put your main code here, to run repeatedly:
>      
>       if (current_time > previous_time)
>         {
>          Serial.println(current_time - previous_time);
>          previous_time = current_time;
>         }
>     }
>      
>     void pps_interrupt(void) {
>       current_time = micros();
>     }
>
>     I constantly measure the pulse as being off around 360uS do you think that is indicative of noise on the leading edge? 
>
>     Mark 


Re: Change Request.

Bill Cromwell
 

Hi,

That might help but you could always resort to a label making printer, a pice of Dyno tape or even use a sharpie to mark it. Use transparent scotch tape over a printed paper label. How many people are going to be looking at the back?

73,

Bill KU8H

bark less - wag more

On 7/6/20 4:03 PM, N3MNT wrote:
On the surface this may seem like a senseless request, but as i get more and more QRP-Labs kits with QRP-Labs enclosures, I find it needed to add label for the power requirements so I don't accidentally supply an incorrect voltage.  If any changes are made to back panels in the future, would it be possible to add the voltage for the power connector.  I am so impressed by this kit that I hate  to ask for any changes, but this should be an easy one if any future changes are made.


Re: 80 Meter 50 Watt PA

Bill Cromwell
 

Hi,

Just to add to comments from Ron and Shirley the difference between 40 watts and 50 watts is insignificant. We have to double the power output to gain something a bit more than a half S-unit at the receiving end. Or reduce it by half to lose that small amount at the receiver. The difference between 40 watts and 50 watts will be completely invisible to me when I tune across your signal :) Enjoy.

I am pleased to see these reports. I will now be ordering my own 50 Watt amp and building it for 80 meters:)

73,

Bill KU8H

bark less - wag more

On 7/6/20 12:38 PM, Ralf Rosche wrote:
Hi all,
i am using my 80m 50w PA since some time now.
I took 50-2 toroids and 470pf and 1200pf silver mica caps.
I tested the low pass with my nano VNA and it works perfect as expected.
Bias adjustment was no problem. Works good out of the box :-)
Regarding the output power, what do you achive?
I took a 19V Notebook power supply and getting about 40watts with 3350mA current drain.
It peeks at 45w at keydown and goes back to 40w.
My QCX is powered with 12V and has 3w rf output.
Is 40w usual or should I optimize my PA?
Ralf


Change Request.

N3MNT
 

On the surface this may seem like a senseless request, but as i get more and more QRP-Labs kits with QRP-Labs enclosures, I find it needed to add label for the power requirements so I don't accidentally supply an incorrect voltage.  If any changes are made to back panels in the future, would it be possible to add the voltage for the power connector.  I am so impressed by this kit that I hate  to ask for any changes, but this should be an easy one if any future changes are made.


Re: QCX+ alive!

Dean Smith
 

Just added 9 pin dway for GPS/ISP
No need to take lid off to update :)
Cringey moment but worth it!


Horizontal lines after power up

Jim Netwal
 

I just finished assembling a new QCX 20 (non plus) and the display shows horizontal lines.  At first power up it booted fine.  I was able to set the band and adjust the screen.  After a couple minutes of being on horizontal lines started moving from top to bottom eventually ending with one line that is no longer moving.  Any thoughts?

Thank you!
Jim W9UUM


Re: TNT Shipment 123511328 - Your shipment to United States has been delivered

Larry Taylor
 

What is your serial number?

Larry

. That explains the typos. 

On Jul 6, 2020, at 11:06, K2DB Paul Mackanos <paul.mackanos@...> wrote:


It was just delivered.
Paul K2DB
<IMG_0978.jpg>


---------- Forwarded message ---------
From: myTNT <reply@...>
Date: Mon, Jul 6, 2020 at 2:00 PM
Subject: TNT Shipment 123511328 - Your shipment to United States has been delivered
To: <paul.mackanos@...>


Your shipment has been delivered!
Email not displaying correctly? click here
Shipment number:
123511328
Your shipment has been delivered
Shipment 123511328 has been delivered to Homosassa, United States today.
From
Ortaca, Turkey
June 30, 2020
  Delivered to
Homosassa, United States
July 6, 2020 at 13:54




 
 
Delivered
See more details
 
PS: Don't forget to download our mobile
app to manage all your shipments.
 
What do you think of this email?
1 2 3 4 5
 
 
This email has been sent to you by TNT notification service. This is because the email address paul.mackanos@... has been registered to receive notifications for this specific shipment. If this wasn’t you, you can unsubscribe.

Please consider the environmental impact before printing this email and its attachments. If you do have to print, try to do so in black and white and keep it double-sided where possible.


TNT Shipment 123511328 - Your shipment to United States has been delivered

K2DB Paul Mackanos
 

It was just delivered.
Paul K2DB


---------- Forwarded message ---------
From: myTNT <reply@...>
Date: Mon, Jul 6, 2020 at 2:00 PM
Subject: TNT Shipment 123511328 - Your shipment to United States has been delivered
To: <paul.mackanos@...>


Your shipment has been delivered!
Email not displaying correctly? click here
Shipment number:
123511328
Your shipment has been delivered
Shipment 123511328 has been delivered to Homosassa, United States today.
From
Ortaca, Turkey
June 30, 2020
  Delivered to
Homosassa, United States
July 6, 2020 at 13:54




 
 
Delivered
See more details
 
PS: Don't forget to download our mobile
app to manage all your shipments.
 
What do you think of this email?
1 2 3 4 5
 
 
This email has been sent to you by TNT notification service. This is because the email address paul.mackanos@... has been registered to receive notifications for this specific shipment. If this wasn’t you, you can unsubscribe.

Please consider the environmental impact before printing this email and its attachments. If you do have to print, try to do so in black and white and keep it double-sided where possible.


Re: 80 Meter 50 Watt PA

Shirley Dulcey KE1L
 

Also, the output power is rated at 20V input. Your laptop power supply is rated at 19V, and it may not deliver that full voltage under what is likely to be a near-maximum load for it. Check the actual voltage being delivered to the 50W PA; if it's well under 20V, the output power is going to be less than 50W.


On Mon, Jul 6, 2020 at 1:09 PM Ronald Taylor <wa7gil@...> wrote:
Ralf, speaking only from my own experience, I did the same thing. I actually built a multi-band version with switched lowpass filters and got similar results on 80. I noticed the amplifier performed best on 40 meters with a slight decline on 80. Remember it was designed for optimal performance on 40, 30 and 20 meters. But 40 watts on 80 will certainly perform very well. And it's only 1 dB down from 50 watts. I would say enjoy it as is... 73 ... Ron

On Mon, Jul 6, 2020 at 9:38 AM Ralf Rosche <ralf.rosche@...> wrote:
Hi all,
i am using my 80m 50w PA since some time now. 
I took 50-2 toroids and 470pf and 1200pf silver mica caps.
I tested the low pass with my nano VNA and it works perfect as expected.
Bias adjustment was no problem. Works good out of the box :-)

Regarding the output power, what do you achive?
I took a 19V Notebook power supply and getting about 40watts with 3350mA current drain.
It peeks at 45w at keydown and goes back to 40w.

My QCX is powered with 12V and has 3w rf output.

Is 40w usual or should I optimize my PA?

Ralf


Re: QCX+ - not working after assembly

Knut Steinar Fremme OE4KSF
 

Just a short comment 
I'm really amazed about this kit , how much functionality that has been put into the unit - and to that cost.
After some fine adjustments etc - I'm now able to listen to signals down to 0.2uV and output stable at 3.5W - 12V :-)

On my wish list could be a AGC on the LF output and I'm going to make one. 

And I will also mount a speaker and small amplifier in the box.

Another thing is that I would prefer swapping the position of the volume and tuning buttons - easier to reach the upper one than the lower position for tuning.

But in general - a superb kit 
Thank you Hans

73 OE4KSF Knut


Re: QCX+ - not working after assembly

Knut Steinar Fremme OE4KSF
 

Well - I isolated the whole thing to around the SI5351, and did not find any soldering faults etc, so there was aither the SI or the x-tall.
Easier to change the x-tall - so started with that one, and that worked.

I have now left the unit be powered up for 4 hours , did the calibration of reference frequency by using 1pp from GPS,
Found the frequency then to be  14.000.707, but after some manual adjusting - able to get it to  14.000.000,017 :-)
See attached photos
And one photo from my reference - I think it should be good. I have 2 of them and they show the same :-) 







Re: 80 Meter 50 Watt PA

Ronald Taylor
 

Ralf, speaking only from my own experience, I did the same thing. I actually built a multi-band version with switched lowpass filters and got similar results on 80. I noticed the amplifier performed best on 40 meters with a slight decline on 80. Remember it was designed for optimal performance on 40, 30 and 20 meters. But 40 watts on 80 will certainly perform very well. And it's only 1 dB down from 50 watts. I would say enjoy it as is... 73 ... Ron


On Mon, Jul 6, 2020 at 9:38 AM Ralf Rosche <ralf.rosche@...> wrote:
Hi all,
i am using my 80m 50w PA since some time now. 
I took 50-2 toroids and 470pf and 1200pf silver mica caps.
I tested the low pass with my nano VNA and it works perfect as expected.
Bias adjustment was no problem. Works good out of the box :-)

Regarding the output power, what do you achive?
I took a 19V Notebook power supply and getting about 40watts with 3350mA current drain.
It peeks at 45w at keydown and goes back to 40w.

My QCX is powered with 12V and has 3w rf output.

Is 40w usual or should I optimize my PA?

Ralf


Re: 80 Meter 50 Watt PA

Ralf Rosche
 

Hi all,
i am using my 80m 50w PA since some time now. 
I took 50-2 toroids and 470pf and 1200pf silver mica caps.
I tested the low pass with my nano VNA and it works perfect as expected.
Bias adjustment was no problem. Works good out of the box :-)

Regarding the output power, what do you achive?
I took a 19V Notebook power supply and getting about 40watts with 3350mA current drain.
It peeks at 45w at keydown and goes back to 40w.

My QCX is powered with 12V and has 3w rf output.

Is 40w usual or should I optimize my PA?

Ralf


QCX+, 50W amp and GPS Rx arrived UK

John Pagett
 

My QCX+ kit, amplifier and GPS were dispatched from QRP Labs HQ on Friday and arrived today.
Tracking on TNT was faultless.

Now I've got to decide which one I'm building first!

Thanks, Hans.

John
G4YTJ


QCX+ Arrived in Nova Scotia

Vernon Matheson
 

Rec'd by TNT in Ortica on June 30, arrived July 6...pretty darn good service.

Vernon


Re: 50W Amp, blown up!

George Korper
 

Hi Mike,
I'm sure you will find it. Please post when you do. 
George

On Mon, Jul 6, 2020 at 7:02 AM Mike Hoddy <g0jxx.radio@...> wrote:
Hi Alison, I did read the manual and attempted to set the bias from zero to 85mA with no RF and then back off But it went from nothing to 125mA (approx) pretty quickly.  No, I’m not using it for SSB , CW only as its paired with a QCX running just less than 2W   I’ve made one before, for 40m and that works fine.  It’s possible I’ve wound something wrong but a visual check doesn’t show that and the turns aren’t shorting out to the ferrites as far as can be tested.  It could be I’ve made a fundamental error somewhere in the build.