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Display QCX-mini

Toni Cossio
 

Hi, I finished my QCX-mini with great satisfaction both in reception and in transmission. I have a problem: when I type a message at each dot or line the display turns off. Can you help me find the error. Thank you, Toni IV3XHM


Re: Idea for future QSX production

ajparent1/KB1GMX
 

Steve,
If you read it as cynical then its on you.  The comment was not aimed
at any single person.

My comments were more about others trying to satisfy a "need to help"
and the interrupts caused by  need to respond.   Especially those talking
about funding.  

From what I know if you want to fund him then send time. Or do things
that do not consume time.  Really as a developer time is the only thing
that can't be given or bestowed, but it is universally in short supply.

Good that you have such experience when you get to 50 years
in all corners of electronics like me you will find learning is still
the most enjoyable part of the process.   

I have two QCX and they are a really fun radio.

Allison
-------------------------------
Please reply on list so we can share.
No private email, it goes to a bit bucket due to address harvesting


Re: Idea for future QSX production

Michael N6MST
 

Many people, including the guy who owns the company and designs all the products, did not think it was a sensible idea. Honestly, why is this thread still a thing?


Re: Idea for future QSX production

Ronan Cantwell
 

Yeah.... Who do you think you are, Steve Ireland ?!?!
You waltz in here with your offers of help and sensible ideas.....  😉


Re: Puzzled with power measurements #20m #alignment #qcx

Dave VE3GSO
 

Excellent!  A good example of impedance matching at work!  Well done.

Dave

On Apr 20, 2021, at 20:00, ke9uw <c-hawley@...> wrote:

I watched Hans' video on adjusting the power output.
I took 4 turns off of L4, and 2 turns off L3 increasing the output of my 80M QCX+ from 3.2 watts to 5.25 watts. A very dramatic increase.


Re: Puzzled with power measurements #20m #alignment #qcx

ke9uw
 

I watched Hans' video on adjusting the power output.
I took 4 turns off of L4, and 2 turns off L3 increasing the output of my 80M QCX+ from 3.2 watts to 5.25 watts. A very dramatic increase.


Re: QCX+ 40M Low Power Output

Russ AB6MU
 

Howard,

I'm glad you got it figured out! 40Vpp with a 12 volt power supply is perfect. Enjoy you QCX+!


Re: QCX+ 40M Low Power Output

howard mortfield
 

Solved the problem turns out it was the bench power supply. While the QCX was in transmit it would go from 12 Volts down to 6 Volts.  Didn't notice this before because I was focused on the oscilloscope.  I connected a battery to the QCX+ and measured 40V peak to peak.   So it was fine all along.  Based on that,  I'm close enough to the target of  4 Watts at 12 Volts, so I think I will leave it as is and see how it performs.  Thanks for your response. 

73,
Howard

On Tue, Apr 20, 2021 at 6:55 PM Russ AB6MU <u.rusty@...> wrote:
Do you mean 18 volts peak to peak?


Re: All roads lead to T1

William Jenrick
 

I tried all of that pushing and shoving around with all my ex-wives.....They could push and shove much more than me!!!!!
Ham since 1960....Although I haven't renewed my license since 1967. Waiting to see if I can get my mini build to work before I renew.  --... ...--

On Tue, Apr 20, 2021 at 3:13 PM Gary Bernard via groups.io <garybernard2=aol.com@groups.io> wrote:
I have built several QCX products. I recently finished a QCX plus. II always check the installation of T1 making sure that there is continuity. This build checked out fine and T1 appeared to be working just fine. But, no signal on the adjustment of the BPF. I traced everything in the audio following Han's video each step of the way. I even used the same cheapo scope Han's used. Well, guess what, The problem was in the last turn of T1. I found a nicked wire hidden under the toroid of last turn. It was intermittent. Found it by probing and pushing around like all experienced hams do.
Never give up.
Gary W0CKI, since 1954



--
William Jenrick 


Re: QCX+ 40M Low Power Output

Russ AB6MU
 

Do you mean 18 volts peak to peak?


Re: QCX+ 40M Low Power Output

Curt wb8yyy
 

How many watts is that?  If its vicinity of 3 watts well enjoy some qsos. 

If you watched Hans video on tune up, the coil closest to the PA is the first one to adjust. Next step is to remove a turn at a time, and see what that does. I am willing to quit when its above 4 watts, your call.  

Curt


All roads lead to T1

Gary Bernard
 

I have built several QCX products. I recently finished a QCX plus. II always check the installation of T1 making sure that there is continuity. This build checked out fine and T1 appeared to be working just fine. But, no signal on the adjustment of the BPF. I traced everything in the audio following Han's video each step of the way. I even used the same cheapo scope Han's used. Well, guess what, The problem was in the last turn of T1. I found a nicked wire hidden under the toroid of last turn. It was intermittent. Found it by probing and pushing around like all experienced hams do.
Never give up.
Gary W0CKI, since 1954


QCX+ 40M Low Power Output

howard mortfield
 

Completed the QCX+ 40M.  The maximum output voltage as measured with a dummy load is 18V and the waveform looks fine.   Reducing the spacing as much as possible in L4 and L3 increases the output but still not above 18V.  Checked for continuity at the pads for L1 through L4 and all is well.  Receiver aligned fine.  The transmitted signal sounds fine.
Any suggestions?

Thanks
Howard


Re: QCX mini Rev1 20m problem - no loud sound heard in step 8.7 Peak BPF

N3MNT
 

Most likely the pulses from the encoder.  Not the indication of a problem.


Re: QCX mini Rev1 20m problem - no loud sound heard in step 8.7 Peak BPF

neven9a5yy@...
 

Hello!

I put my QCX mini 20m to the enclosure. I made today the first QSO with my friend Zeljko, 9A2EY using my QCX mini 20m and received RST 559.
The RX  and TX are fine. CW decoding also works fine.

I noticed strange sound when frequency is changed with TUNE knob .
I didn't hear such sound at my QCX 40m when frequency is changed.
Does anybody can tell me what can be cause of this strange sound at QCX mini 20m?

73 de Neven, 9A5YY


Re: Idea for future QSX production

Curt wb8yyy
 

All should be well here. Hans business model to roll out the qsx in bite sized pieces is identical to what elecraft did on the K2, except his tech base is much more affordable. Appreciate he has both through hole and surface mount automation. Forgive my optimism and QSY to other pursuits.  73 curt


Re: Arduino Shield SlowHell #15m

john.rogers@...
 

Michael,
I'm not sure about the "SHIELD" but K3NG produced a great arduino keyer. See:
https://github.com/k3ng/k3ng_cw_keyer/wiki
(description)
and:
https://github.com/k3ng/k3ng_cw_keyer
for code that includes hellschreiber and many other modes and features.

Maybe you can extract the portion of his code for your project.

John AC2SG


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

George Byrkit
 

well, that explains what I have in two ocxo kits that I purchased in July 2018.  they both have these extra parts.  the search here quickly supplied the answer!

Thanks, Hans, for all that you do.
73,
George K9TRV


Re: Mini Audio is very low and distorted...FIXED

ke9uw
 

Oh and I built a VFO, an Ultimate 3, and a Clock. No bad parts there either...just this one Mini op amp. BTW, I see a lot of offers on Ebay for these OPA2277 amps but kind of afraid of getting bootleg copies of them so i ordered from DigiKey. I see that some of the Ebay ones have the BB Logo and some have BB without the frame around it...not sure what that means.


Re: Mini Audio is very low and distorted...FIXED

ke9uw
 

I have to say that I have built a QCX, 3 QCX+, 2 Mini, and one 50 watt amp and only the one Mini had a bad op amp. I fussed quite a bit before I believed it. Tested all the resistors, capacitor, etc around the op amp and had to finally conclude it was shorted output to rail. I had to remove a resistor to test it and put it back because it has a 470uF cap across it and the Fluke multimeter can't deal with it on ohms. It would be easier to remove the cap though after the effort in putting the tiny resistor back

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