Date   
Re: Advice on QCX 40

N3MNT
 

Go to dollar store and get several cupcake pans.  Check each part and put them is separate places in the pans with a piece of paper with the part number on it.  Verify parts twice.  It is much easier to double check a part than it is to try to rework it.  When you get tired quit for the day.  The goal is to build a radio that works and not one in the fastest time. 

Re: QCX-40 "too loud"

Stephan Paukner
 

Hi John,

So, you're saying that I didn't actually break anything. That's awesome! ;-)

And mni tks for that link, I wasn't aware that this is a common thing. I'll try out the suggestions!

best 73
Stephan, OE3SPR

Re: Receiver software #rcvr (WSPR is working!) #rcvr

Mike Berg
 

After rereading the instructions in the manual, I was able to tune in the 40m WSPR band with very good results.



 

I'm quite impressed with the Tayloe method of detection.
73
Mike N0QBH

Re: Advice on QCX 40

Graham
 

Hi Dan make winding and fitting T1 first job , easier without the other components around it. I've built three QCXs 
             now . Good Luck  72 Graham G3UD


From: QRPLabs@groups.io <QRPLabs@groups.io> on behalf of Shirley Dulcey KE1L <mark@...>
Sent: 19 September 2019 18:49
To: QRPLabs@groups.io <QRPLabs@groups.io>
Subject: Re: [QRPLabs] Advice on QCX 40
 
Take your time. Use a magnifier as needed to suit your vision. If you are in any doubt about component values, test them with a multimeter. Take special care with T1, the larger toroid with multiple windings; it's important to wind it correctly and to put all the leads into the correct holes on the board.

On Thu, Sep 19, 2019 at 12:59 PM Dan Hughes <drhughes719@...> wrote:
Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Advice on QCX 40

R. Tyson
 

Hi,
If you haven't already done so then download the excellent construction manual. No need to print it all off as it is easy to work with it displayed on your computer.

Read it through and take time to get your head around making and fitting T1. It's not difficult it just looks that way at first.

Double check every component before soldering it in place. Much easier to get it right than try to remove it later.

Check every solder joint with a decent magnifying glass after you make it. 

Take your time and enjoy the build and it should work first time.

Reg       G4NFR

QCX Frequency Memory

Don DeGregori
 

Push Left button, Preset, and again. Select a memory #. I see what I put in. How to get back to VFO mode with memory frequency I just selected?

Re: Advice on QCX 40

Shirley Dulcey KE1L
 

Take your time. Use a magnifier as needed to suit your vision. If you are in any doubt about component values, test them with a multimeter. Take special care with T1, the larger toroid with multiple windings; it's important to wind it correctly and to put all the leads into the correct holes on the board.


On Thu, Sep 19, 2019 at 12:59 PM Dan Hughes <drhughes719@...> wrote:
Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Advice on QCX 40

Salim (TA4MUO)
 

By the way, sorry for "QSK". That was phone keyboard :)

19 Eyl 2019 Per 20:35 tarihinde SALİM ORHANLI <salim.orhanli@...> şunu yazdı:

Hello, I have completed the installation of my QCK 40 with a total of 12 hours of work lasting 3 nights.  However, I spent the previous week carefully reviewing the installation manual.  Hans has created a very descriptive and detailed assembly guide.  It was a very enjoyable assembly work.  You need to take care of the coil windings.  I wish you success.  

73 at TA4MUO.

19 Eyl 2019 Per 19:59 tarihinde Dan Hughes <drhughes719@...> şunu yazdı:
Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Advice on QCX 40

Salim (TA4MUO)
 

Hello, I have completed the installation of my QCK 40 with a total of 12 hours of work lasting 3 nights.  However, I spent the previous week carefully reviewing the installation manual.  Hans has created a very descriptive and detailed assembly guide.  It was a very enjoyable assembly work.  You need to take care of the coil windings.  I wish you success.  

73 at TA4MUO.

19 Eyl 2019 Per 19:59 tarihinde Dan Hughes <drhughes719@...> şunu yazdı:

Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Advice on QCX 40

George Korper
 

Hi,
The best advice I can offer is to take every part and the parts list to a quiet area and then 
check that all the parts have been included. I tape each part to a note card or sheet of paper with the value and the part number and assembly step. . I check each part with a meter and remember that I must write very legibly. Them when I assemble I check again. I follow each step exactly as every hint has been useful. I read the assembly manual at least three times and triple check placement on the board. I never go out of sequence to speed things up. 
I have made two mistakes on the QCX  40. I put the two diodes in the wrong holes and put in a resistor with a poor joint. I have built three kits and each one works exactly as specified including output. I don't use the smallest tip pencil iron but 15 watts with a small slight blunt pencil tip. I am using a head magnifier and sometimes a handheld magnifier and a spotlight. 
The toroid transformer is easy if you follow Han's advice to the letter. 
The kit should not be rushed with the outcome driving the assembly but rather each step
is to be relished and accomplished. 
Good luck because that helps too!
73's
George K3GK

Re: Advice on QCX 40

John Terry (W0JDT)
 

I have done two QCX, I had a much better time using a head magnifier, about 2.5 x, just a suggestion.


On Thu, Sep 19, 2019 at 12:21 PM _Dave_K0MBT <davesters@...> wrote:
Can't offer any advice as i have had a qcx40 on otder for days earlier than you. I plan on installing a so239 connector instead of the bnc and build in one of my minikeys onto the board.

Was looking at the schematic/wiring diagram and like how he hooked up the earphone/speaker jack, by leaving the barrel float letting both a stereo or monaural jacks plug in without problems.
--
73
Dave
k0mbt
Ham_Made_Keys

Re: Advice on QCX 40

_Dave_AD0B
 

Can't offer any advice as i have had a qcx40 on otder for days earlier than you. I plan on installing a so239 connector instead of the bnc and build in one of my minikeys onto the board.

Was looking at the schematic/wiring diagram and like how he hooked up the earphone/speaker jack, by leaving the barrel float letting both a stereo or monaural jacks plug in without problems.
--
73
Dave
k0mbt
Ham_Made_Keys

Re: Advice on QCX 40

morseoneuk
 

patience Dan, It can take a while. my first took over three weeks..   but well worth the wait. having a great time with my QCX40 and assembling my QCX20 at the moment.
best regards  Scotty Gi0bey

On Thursday, 19 September 2019, 17:59:21 BST, Dan Hughes <drhughes719@...> wrote:


Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Resistor Error ?

w2eck
 

Guys - thanks for the updates and Jim thanks for the offer on the 4.3K. I already ordered some that will be here tomorrow. 

73 Paul w2eck 
ps: my skills for removing thru hole components have improved by necessity. :0)) Practiced on an old board before tackling the QCX resistor removal .

Advice on QCX 40

Dan Hughes
 

Greetings all,

I’m awaiting my QCX 40 (it’s been sitting in Turkey since the 6th) and wanted to solicit advice from those of you that have built one.  Is there any advice/suggestions you’d give me prior to me starting my build?  Anything tricky or unusual about it?  Anything you wished you had known before you got it?

Thanks all and 73,

Dan N9ZTO 

Re: Resistor Error ?

Jim W7EED
 

Hi Paul,

I'd be happy to drop a couple of 4.3KΩ resistors in the mail if you would like; no charge.
--
73,
Jim W7EED

Re: Resistor Error ?

Steve in Okinawa
 

A few years ago when i started homebrewing and building kits I bought an assortment of 1/4 watt strip resistors from eBay. For a very few dollars i got 50 each of a wide range of useful values. I have yet to need any more by mail order or from the local shop. I did the same for 50-volt ceramic capacitors, which came packed in little bags rather than on strips. JS6TMW

Re: Resistor Error ?

Daniel Solano Gómez
 

Hello, Paul,

According to the manual, all resistors are 1/4 watt, 1% tolerance.

Good luck with your build! I'm still working on getting the receive fully working on my QCX40.

73,

Daniel, AG5UT

Re: Resistor Error ?

geoff M0ORE
 

A suggestion on removing resistors etc when installed vertically.

Cut the leg that is bent over about half way down. Remove the cut piece and discard. Remove the resistor ( you hold the resistor with heat applied to the underside ). Keep the resistor for re-use. Install the new resistor in the two holes you have just cleared. Install the first resistor in the correct hole. Take a discarded piece of wire from a resistor you have installed previously. Install this piece of wire in the "other" hole and solder to the remainder of the wire that you cut previously. Just a quick dab of solder is sufficient to make the contact. This can be done on components installed horizontally but is a bit more difficult unless you have a pair of very small cutters.

On 19/09/2019 15:04, w2eck wrote:
Appreciate all the help and suggestions. Got R18 out of the R41 location, but not enough of one leg left to re-use . Have holes cleaned out, should be good to go.
So another question. Jameco has the resistor in a 10 pak- both 1/4 and 1/2 watt. So will either of those ratings work here? Parts list doesn't specify. 

73 Paul w2eck

Re: Resistor Error ?

w2eck
 

Appreciate all the help and suggestions. Got R18 out of the R41 location, but not enough of one leg left to re-use . Have holes cleaned out, should be good to go.
So another question. Jameco has the resistor in a 10 pak- both 1/4 and 1/2 watt. So will either of those ratings work here? Parts list doesn't specify. 

73 Paul w2eck