Date   
Re: Smoked my 40

Gregg Myers
 

Hi Jon,
You likely just smoked the RF Finals, Q1, Q2, and Q3. Hopefully, just those. They are underneath the display where you saw smoke. I think you can repair easily enough. I guess you had no antenna or dummy load connected as a WSPR transmission with no load can do that!
73,
Gregg

On Fri, Jan 3, 2020 at 11:47 AM Jon R Garber <kc8rlp@...> wrote:
Well dang, I smoked my QCX 40. I was going to operate WSPR. I connected my GPS to the radio, and while attempting to set the programming all of a sudden smoke started to pour out from underneath the display. Now there is no power out of the rig. 

Re: QCX alignment aid #alignment

Paul AI4EE
 

Good hint! Thanks.


On 1/3/2020 2:00 PM, g4edg via Groups.Io wrote:
Hi

May be you will find this useful. I was always having to refer to the manual to see which variable resistor to adjust for each menu item regarding the receiver alignment.

I have printed labels for each VR showing the relevent  menu item where adjustment is made.

Steve G4EDG

QCX alignment aid #alignment

g4edg
 

Hi

May be you will find this useful. I was always having to refer to the manual to see which variable resistor to adjust for each menu item regarding the receiver alignment.

I have printed labels for each VR showing the relevent  menu item where adjustment is made.

Steve G4EDG

Smoked my 40

Jon R Garber
 

Well dang, I smoked my QCX 40. I was going to operate WSPR. I connected my GPS to the radio, and while attempting to set the programming all of a sudden smoke started to pour out from underneath the display. Now there is no power out of the rig. 

Re: 50w amp

ron mcmurray
 

i am using a multi band lpf
ron

Re: need better eyes

Chris Herd
 

Hi

I find the best way to sort this is to print it out on paper. Blow it up to get more room to write marks on the paper.

Then mark on the paper in groups of 3 or 5.

Add the groups up multiply by the group size and you are done.

This method deals with pet/family “distractions”.

All the best to you and your family for 2020.

Chris
 

Re: need better eyes

Michael Bouchereau
 

Richard,

My eyes are almost 60 years old. I counted (twice) 56 turns from center. 73,

Mike
KI5FIS

On Fri, Jan 3, 2020, 10:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

Re: need better eyes

Brien Pepperdine
 

My eyes are not what they were in Y2K... but even then I was finding that a good magnifying glass combined with a straight pin allowed me to point at each turn and go 'round the circle and count one winding at a time. Yes, I did this many times for each toroid.. sometimes the count was off because my hand shifted, or the glass focal length moved or I got bored.... but in the end I would get multiple counts and find I had agreement at the defined number.  I used to tie fishing flies a lot so am used to winding stuff round.. though in that case the number is not all that important.... its the buggy look that matters. Still its close work and we do use Magnivisors for it.

Tedious, yes. But working radio product.. yes to that too.

Which is to say the guy who had ONE used qrp rig I bought (who should have been better than it turned out to be) was WAY off on his VFO toroid count.... 57 vs. 65 or something like that. No excuse for that. Take the time is what is required. Classical music helps.. I keep a stream of it going off of the web...no talk... no commercials.. concentration maintained (hopefully). Say your Mantra... MMMMMMNOQRMMMMMMM.....

Happy New QCX Year

Brian VE3VAW


Re: need better eyes

Simon Kennedy
 

Richard,

It looks like 40/5/5/6 to me, the other advice you have received about counting turns is very valid and it is much easier to check and recheck before installing T1 than have to removed it later!

Simon
G0FCU.



On Fri, Jan 3, 2020, 10:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

Re: need better eyes

Richard Friess <ka8kcr@...>
 

Thank you for the tips. Not used to this winding transformers, done a few Baluns in my time, but this is all new to me, and being almost 82 is not a help..Emoji


Richard Friess KA8KCR


On Friday, January 3, 2020, 12:25:58 PM EST, Richard Friess via Groups.Io <ka8kcr@...> wrote:


OK, Thank you for the tip on on how to count the turns. Not at all experienced at this, also being almost 82 doesn't help.Emoji

Richard Friess KA8KCR


On Friday, January 3, 2020, 12:14:52 PM EST, George Korper <georgekorper@...> wrote:


To my eye it looks like you have extra turns. Look at the pix and count each time the wire passes through the center. I like your pic because I can magnifying it. If you have a printer you can enlarge and place numbers by each turn. It's intimidating at first but don't rush.
You actually may have to remove turns anyway because sometimes you might have to. It's a process.  

One  of the problems that causes me anxiety is kits only come with limited magnet wire. I bought a roll on Amazon. Cheap tranquility in my opinion😏

On Fri, Jan 3, 2020, 10:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

Re: need better eyes

Richard Friess <ka8kcr@...>
 

OK, Thank you for the tip on on how to count the turns. Not at all experienced at this, also being almost 82 doesn't help.Emoji

Richard Friess KA8KCR


On Friday, January 3, 2020, 12:14:52 PM EST, George Korper <georgekorper@...> wrote:


To my eye it looks like you have extra turns. Look at the pix and count each time the wire passes through the center. I like your pic because I can magnifying it. If you have a printer you can enlarge and place numbers by each turn. It's intimidating at first but don't rush.
You actually may have to remove turns anyway because sometimes you might have to. It's a process.  

One  of the problems that causes me anxiety is kits only come with limited magnet wire. I bought a roll on Amazon. Cheap tranquility in my opinion😏

On Fri, Jan 3, 2020, 10:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

Re: need better eyes

George Korper
 

To my eye it looks like you have extra turns. Look at the pix and count each time the wire passes through the center. I like your pic because I can magnifying it. If you have a printer you can enlarge and place numbers by each turn. It's intimidating at first but don't rush.
You actually may have to remove turns anyway because sometimes you might have to. It's a process.  

One  of the problems that causes me anxiety is kits only come with limited magnet wire. I bought a roll on Amazon. Cheap tranquility in my opinion😏

On Fri, Jan 3, 2020, 10:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

Re: 50w amp

@CurtisM
 

Huh?

Please note an APPROPRIATE LPF is needed for EVERY BAND you wish to operate it on.  So if you have ONE external LPF - see what its cut-off frequency is.  Traditional ham LPFs only reject signals above 30 MHz. 

Yes the internal LPF will establish the highest frequency that can pass through the PA.  If you want to use it at a lower frequency, you can add a second (lower frequency) external LPF - but note you will experience the higher loss of having 2 filters (maybe this is not a huge deal - worthwhile to experiment to see how well a 40 meter PA could work on lower bands, with an APPROPRIATE LPF added). 

Curt

Re: need better eyes

@CurtisM
 

Me too! 

In counting turns, each time the wire enters into the center, it counts at a turn.  In essence the first turn ONLY goes through the center, and when you wrap around and back through the center - this is the second turn.  It's the convention used - to define how to wind the coil. 

A difference between 38 and 39 turns should not be substantial.  I would suggest counting turns on the smaller windings for sure ! 

If you think you are at 38 +/- 1 turn, and the proper number of turns on the other windings - you can install this complex transformer.  If all is okay, the calibration routine (built into the QCX, its wonderful and very cool to experience) will affirm things.  Also when you operate the receiver, your ears can affirm you do not have an image signal about 1.5 kHz away from any real strong signal you receive. 

Proper orientation of each coil is essential !  Check that as you install it.  Check it BEFORE soldering (at least one ham I know did some bad board damage taking this coil in and out). 

Carefully verify things - but I would not myself rewind it all.  You can use a fine pencil or other tool to count number of windings -- been there myself. 

Curt wb8yyy

Re: need better eyes

Gregg Myers
 

Hi Richard,

On two of the 5 turn windings I think I see 6 turns instead of 5. That is easy to unwind one turn once you start feeding the wires into the correct holes. I think the 38 turns looks correct but it’s a bit hard to count because of some reflections.

As a rule,  I always just count the wires in the center of the toroid as each pass through center counts as one turn. So you can verify once again as you are placing T1 and have started to separate the windings.

73,
Gregg

On Fri, Jan 3, 2020 at 9:56 AM Richard Friess via Groups.Io <ka8kcr=yahoo.com@groups.io> wrote:
              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

need better eyes

ka8kcr@...
 

              I have just started to assemble the QCX 5 W transceiver, and am not sure of the count on the T-1 I have wrapped. Took a picture of it to enlarge on my computer, are supposed to be, 38 turns + five turnes times three, for a total of 53 turns. I am not comfortable with what I see, someone with more experience can look at the picture and give me your opinion? Would appreciate any input.                                              

Richard Friess KA8KCR

50w amp

ron mcmurray
 

when multibanding the amp do you bypass the internal lpf. i have an external lpf.
ron, kc0tdj

Re: 50W amplifier kit documentation findings

Gregg Myers
 

Excellent, Hans.
I figured you already knew about the above and now you already fixed it, which isn’t surprising either. I had downloaded the manual when I ordered the kit, so it is ~20 days old or more. I should have checked for an update. 

That wasn’t too bad shipping time to the USA either (20 calendar days during the holiday season)!

73!
Gregg

On Thu, Jan 2, 2020 at 11:19 PM Hans Summers <hans.summers@...> wrote:
Hi Greg

All these issues you mention, have already been fixed in the current manual version on the website. The heading of section 3.13 was fixed some time ago; the disagreement between the C19/C20/C21/C22 on the PCB which was incorrectly called C18/C19/C20/C21 in the manual, was corrected yesterday. So I think all is well, but if anyone finds anything else, please let me know. 

Great job ob the amp construction, glad to see it working so nicely. 

73 Hans G0UPL

On Fri, Jan 3, 2020 at 9:14 AM Gregg Myers <gregg.w7grm@...> wrote:
Hi Hans,

By typo, it was the comments Lex made earlier in this thread:

Topic 3.8 Install Low Pass Filter capacitors C14 and C18

- C18 in documentation is C19 on PCB
- C21 in documentation is C22 on PCB

3.10 Install Low Pass Filter capacitors C19 and C20 (30m only)

- C19 in documentation is C20 on PCB
- C20 in documentation is C21 on PCB

Also, 3.13 says to install capacitors C4 and C5 but it should say C8 and C10.

There might have been one more typo but I'll have to try and remember. Again, it wasn’t anything that could not be figured out from the component placement pictures.

I used a variable speed hand drill at very slow speed to twist the bifilar and trifling wires. That worked a treat.

I am very pleased with the amp and the housing, too. Everything lined up perfectly with the QRP-Labs enclosure.

Cheers and Happy New Year,

Gregg W7GRM



On Thu, Jan 2, 2020 at 11:04 PM Hans Summers <hans.summers@...> wrote:
Hi Gregg

Congrats, it's nice to hear of some people starting to report successful builds of the 50W Amp kit. Hopefully some will be in time for some QSOs on the 2nd January in the new "QRP Labs QRO Party" :-)    An event whose title should be marginally concerning to political correctness hi hi. 

When you are referring to typos in the manual - which typos do you mean? I have fixed all the typos I know about. If there are any others please let me know. 

73 Hans G0UPL
http://qrp-labs.com

On Fri, Jan 3, 2020 at 9:00 AM Gregg Myers <gregg.w7grm@...> wrote:
Glad you fixed it, Vern. I just finished my 50w amp myself. All seem to check out ok on mine, and I measured 51watts out on 20m with 20V linear power supply and the QCX at 13.9v power. The current draw is under 4A on the Amp. Yippee! 

I noted the same typos you saw, but it wasn’t anything that one couldn’t figure out.

Tomorrow, I give it a real test on the air.

Gregg W7GRM

On Thu, Jan 2, 2020 at 12:32 PM harleyleenuke <vfrank59@...> wrote:
Update.  I got my amplifiers working. 
 I had to replace the IFR510's both of them and the R5 pot.   i lucked out, as those were the only broken parts.
 I used a 20 volt power supply and on 40m I am getting 45 watts.  on 20 meters I am able to get40 watts out.

I am pleased with the quality of the kit and the enclosure.  The heats sinks are doing a good job. They do get warm. 

Now to hit the airwaves!
Vern

Re: 50W amplifier kit documentation findings

Hans Summers
 

Hi Greg

All these issues you mention, have already been fixed in the current manual version on the website. The heading of section 3.13 was fixed some time ago; the disagreement between the C19/C20/C21/C22 on the PCB which was incorrectly called C18/C19/C20/C21 in the manual, was corrected yesterday. So I think all is well, but if anyone finds anything else, please let me know. 

Great job ob the amp construction, glad to see it working so nicely. 

73 Hans G0UPL

On Fri, Jan 3, 2020 at 9:14 AM Gregg Myers <gregg.w7grm@...> wrote:
Hi Hans,

By typo, it was the comments Lex made earlier in this thread:

Topic 3.8 Install Low Pass Filter capacitors C14 and C18

- C18 in documentation is C19 on PCB
- C21 in documentation is C22 on PCB

3.10 Install Low Pass Filter capacitors C19 and C20 (30m only)

- C19 in documentation is C20 on PCB
- C20 in documentation is C21 on PCB

Also, 3.13 says to install capacitors C4 and C5 but it should say C8 and C10.

There might have been one more typo but I'll have to try and remember. Again, it wasn’t anything that could not be figured out from the component placement pictures.

I used a variable speed hand drill at very slow speed to twist the bifilar and trifling wires. That worked a treat.

I am very pleased with the amp and the housing, too. Everything lined up perfectly with the QRP-Labs enclosure.

Cheers and Happy New Year,

Gregg W7GRM



On Thu, Jan 2, 2020 at 11:04 PM Hans Summers <hans.summers@...> wrote:
Hi Gregg

Congrats, it's nice to hear of some people starting to report successful builds of the 50W Amp kit. Hopefully some will be in time for some QSOs on the 2nd January in the new "QRP Labs QRO Party" :-)    An event whose title should be marginally concerning to political correctness hi hi. 

When you are referring to typos in the manual - which typos do you mean? I have fixed all the typos I know about. If there are any others please let me know. 

73 Hans G0UPL
http://qrp-labs.com

On Fri, Jan 3, 2020 at 9:00 AM Gregg Myers <gregg.w7grm@...> wrote:
Glad you fixed it, Vern. I just finished my 50w amp myself. All seem to check out ok on mine, and I measured 51watts out on 20m with 20V linear power supply and the QCX at 13.9v power. The current draw is under 4A on the Amp. Yippee! 

I noted the same typos you saw, but it wasn’t anything that one couldn’t figure out.

Tomorrow, I give it a real test on the air.

Gregg W7GRM

On Thu, Jan 2, 2020 at 12:32 PM harleyleenuke <vfrank59@...> wrote:
Update.  I got my amplifiers working. 
 I had to replace the IFR510's both of them and the R5 pot.   i lucked out, as those were the only broken parts.
 I used a 20 volt power supply and on 40m I am getting 45 watts.  on 20 meters I am able to get40 watts out.

I am pleased with the quality of the kit and the enclosure.  The heats sinks are doing a good job. They do get warm. 

Now to hit the airwaves!
Vern

Re: 50W amplifier kit documentation findings

Gregg Myers
 

Hi Hans,

By typo, it was the comments Lex made earlier in this thread:

Topic 3.8 Install Low Pass Filter capacitors C14 and C18

- C18 in documentation is C19 on PCB
- C21 in documentation is C22 on PCB

3.10 Install Low Pass Filter capacitors C19 and C20 (30m only)

- C19 in documentation is C20 on PCB
- C20 in documentation is C21 on PCB

Also, 3.13 says to install capacitors C4 and C5 but it should say C8 and C10.

There might have been one more typo but I'll have to try and remember. Again, it wasn’t anything that could not be figured out from the component placement pictures.

I used a variable speed hand drill at very slow speed to twist the bifilar and trifling wires. That worked a treat.

I am very pleased with the amp and the housing, too. Everything lined up perfectly with the QRP-Labs enclosure.

Cheers and Happy New Year,

Gregg W7GRM



On Thu, Jan 2, 2020 at 11:04 PM Hans Summers <hans.summers@...> wrote:
Hi Gregg

Congrats, it's nice to hear of some people starting to report successful builds of the 50W Amp kit. Hopefully some will be in time for some QSOs on the 2nd January in the new "QRP Labs QRO Party" :-)    An event whose title should be marginally concerning to political correctness hi hi. 

When you are referring to typos in the manual - which typos do you mean? I have fixed all the typos I know about. If there are any others please let me know. 

73 Hans G0UPL
http://qrp-labs.com

On Fri, Jan 3, 2020 at 9:00 AM Gregg Myers <gregg.w7grm@...> wrote:
Glad you fixed it, Vern. I just finished my 50w amp myself. All seem to check out ok on mine, and I measured 51watts out on 20m with 20V linear power supply and the QCX at 13.9v power. The current draw is under 4A on the Amp. Yippee! 

I noted the same typos you saw, but it wasn’t anything that one couldn’t figure out.

Tomorrow, I give it a real test on the air.

Gregg W7GRM

On Thu, Jan 2, 2020 at 12:32 PM harleyleenuke <vfrank59@...> wrote:
Update.  I got my amplifiers working. 
 I had to replace the IFR510's both of them and the R5 pot.   i lucked out, as those were the only broken parts.
 I used a 20 volt power supply and on 40m I am getting 45 watts.  on 20 meters I am able to get40 watts out.

I am pleased with the quality of the kit and the enclosure.  The heats sinks are doing a good job. They do get warm. 

Now to hit the airwaves!
Vern