Date   
Re: QCX 40 Have I trashed it?

Ian McCarthy G3YBY F5VKT
 

Hi Andrew,

Thanks for the offer but i have already taken Dean up on his offer. Where are you by the way? Couldn't see you call to look you up?

73 Ian G3YBY

Re: QCX 40 Have I trashed it?

Andrew Lenton
 

Dear Ian,

 

Do you have a current limiting power supply, you can set to 5V or 3V3, with a current limit of 100 mA and apply to various parts of the board to help you find your fault?

 

We are not far apart, you are welcome to bring your unit around to my QTH look me up on QRZ.com, and contact me directly, I have a solder work station, so can safely remove any parts without damage.

 

BR

 

Andrew

Re: QCX 40 Have I trashed it?

Roger Hill
 

I never had one of Hans's boards bite me!

:)

Roger

---
***************************
Roger Hill
***************************


On 2020-02-24 08:15, Andrew Lenton wrote:

Dear Ian,

 

Do you have a current limiting power supply, you can set to 5V or 3V3, with a current limit of 100 mA and apply to vicious parts of the board to help your fault?

 

We are not far apart, you are welcome to bring your unit around to my QTH look me up on QRZ.com, and contact me directly, I have a solder work station, so can safely remove any parts without damage.

 

BR

 

Andrew

Re: QCX40-Can I add a second RF connector? #qcx

Gregg Myers
 

Hi Bill,

I wouldn't think you would have any negative consequences if you soldered some  50 ohm coax like RG-174 to a second connector on the other side. I don't know your exact space constraints, but a right angle BNC adapter and using the original BNC on the right as-is might take take your coax connection in a better direction and be a lot less work and cheaper. If not, you can solder a short piece of RG-174 to a second BNC and give it a test before committing to it. If the second connection does something unexpected, you won't be out much and it's always good to have a spare BNC connector for other stuff.

73,
Gregg

On Sun, Feb 23, 2020 at 9:43 PM Bill NF6R <nf6r.bill@...> wrote:
Hello,

I have a perfectly working QCX40.  I rearranged my desk and it would be better if the RF connector came out the left side of the case.  Will it mess up and of the tuned characteristics if I add a second RF connector and soldered the wires to the mount points of the existing RF connector?

Thanks,
--

Bill - NF6R
SKCC 20696 NAQCC 9984 FISTS 19479 CalQRP 78 Flying Pigs 4181

QCX40-Can I add a second RF connector? #qcx

Bill NF6R
 

Hello,

I have a perfectly working QCX40.  I rearranged my desk and it would be better if the RF connector came out the left side of the case.  Will it mess up and of the tuned characteristics if I add a second RF connector and soldered the wires to the mount points of the existing RF connector?

Thanks,
--

Bill - NF6R
SKCC 20696 NAQCC 9984 FISTS 19479 CalQRP 78 Flying Pigs 4181

Re: QCX 50w amp

Gregg Myers
 

I just finished my second 50w amp from QRP-Labs (this time for 40m). It looks like another successful build. As a side note, I also built a simple Arduino wattmeter described in November, 2018 QST and used that to test the power out. I cobbled it together in an Altoids tin. I didn't calibrate it, but it seems it must be close as running the amp @20v with my QCX gives approximately 50w and everything else looks a-ok with the amp. Nice.

Gregg
w7grm



On Tue, Feb 18, 2020 at 10:01 AM Kurt Loken <kurt.loken@...> wrote:
That has to be the best call sign (M0RON) in the world!  I’m jealous!

Kurt-AE6UJ

On Feb 18, 2020, at 10:27 AM, M0RON <eustace.andy@...> wrote:

nice job Hans. 
A straightforward build and fitted into the matching enclosure. 
Running on 13.8v with 102mA bias setting it produced a solid 20w into a dummy load with a shade over 3A current draw on tx. I used a U3s giving less than 1w drive and wspr as the mode. Built for 40m. Heatsink barely warm after a 2 minute wspr cycle. 
I had planned to build this for 472khz but abandoned it in favour of a scratch built 100w amp instead for MF. 
Andy
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

Re: Clock firmware release c1.03c

Pat Cahill
 

 

Thank you Hans,

                I just updated the clock firmware, it works great.  I now have a new capability, updating AVR’s set up for in-circuit programming.  Using a new USBASP programmer, AVRDUDESS, and the right Windows driver for the USBASP, all worked the first time.  Thanks for supplying the updates as HEX files and enabling your kits to be re-programmed.  A happy customer!

Pat W0BM

Re: I am trying to do a "factory reset" on my new ver 5 QCX

Dean Smith
 

Yep 7.10 on latest version page 99 on the qcx manual.
Get 7.10 on display press left select button to edit. Use rotary encoder to change value to 17 then finally press left select button. Et viola

Re: I am trying to do a "factory reset" on my new ver 5 QCX

Craig Johnson
 

Tnx Egon. I will be 82 come December.  Doing well and having fun.  I retired at the end of 2019.  I worked too long, but was enjoying most of the time.
73

On Sun, Feb 23, 2020 at 1:45 PM Egon <ve6egn@...> wrote:
Good for you Craig, I am also 81, soon 82.
Egon VE6EGN/SA3EGN
 
Sent: Sunday, February 23, 2020 10:43 AM
Subject: Re: [QRPLabs] I am trying to do a "factory reset" on my new ver 5 QCX
 
Tnx, that did the trick.  I guess I should use instructions for the version I am using.  Live and learn even at 81.
73
Craig

Re: QCX 40 Have I trashed it?

Ian McCarthy G3YBY F5VKT
 

Thanks Dean. Will contact you direct.
73 Ian G3YBY

Re: I am trying to do a "factory reset" on my new ver 5 QCX

Egon
 

Good for you Craig, I am also 81, soon 82.
Egon VE6EGN/SA3EGN
 

Sent: Sunday, February 23, 2020 10:43 AM
Subject: Re: [QRPLabs] I am trying to do a "factory reset" on my new ver 5 QCX
 
Tnx, that did the trick.  I guess I should use instructions for the version I am using.  Live and learn even at 81.
73
Craig

Re: QCX 40 Have I trashed it?

Dean Smith
 

Anyhow, I would first remove, atmel as its socketed and the display. Powering up quite briefly, checking si5351 and ft3254 both visually and with a finger for rapid heating up.
Too hot to keep ur finger on? then this will confirm a supply short. Remove offending component. Regulator still overheating.. Check for further shorts. These two devices usually quite a challenge to remove without previous experience. Not for the faint hearted hi. The atmel and display if they are ok Can be reinstated. These two items if OK should verify the si5351a. If these together shout an error for 5351 then the fun begins..

Re: QCX 40 Have I trashed it?

Paul AI4EE
 

You'll need to send directions on how to get through the roundabout.  😉


On 2/23/2020 7:24 AM, Ian McCarthy G3YBY F5VKT via Groups.Io wrote:
HI,

I have built my QCX 40 rev3 and it was working fine until I tried putting it into a metal case. There was an unknown short and smoke appeared around the voltage regulator and protection diode area and I suspect 12v may have gone down the 5 v line. I have replaced the voltage regulator but there is no 5v output now and the regulator gets very hot so there is a short somewhere. Any ideas? Am I likely to have done too much damage to repair? Any body local to help? I am in North Wiltshire near Swindon.
73 Ian G3YBY

Re: QCX challenge on monday 24.2.2020

Rickw9rea@...
 

I will be on 40 m at 0300 hanging out around 7030
--
Rick w9rea

Re: Dealing with QRP Lab 12 volt Coaxial Connectors

Eric KE6US
 

My colors vary, but otherwise that's how I've done it for about 15 years. Everything 12 volt in my shack, on my bench  and for mobile comm is black/red oriented to the standard used by most ham emcomm equipment.  APP power distribution boxes are also all wired to this standard/convention.That guarantees every 12 volt rig can be plugged into every 12 volt power source. It saves a lot of hassle and they are completely reliable if properly soldered, or better, properly crimped.

The first photo in this wikipedia article shows the standard most used:

https://en.wikipedia.org/wiki/Anderson_Powerpole

I even used them in my larger R/C planes years ago when those annoying Deans connectors were king, though I understand they've all gone to XT connectors now.

Eric KE6US


On 2/23/2020 6:27 AM, ajparent1/KB1GMX wrote:
In my station Power poles are the standard connector for nominal 12V power.

My solution to any kit supplied with coaxial power connectors is to NOT
use them.  I use a soldered in fused pig tail with power poles and the
hole with suitable captive type grommet is used to secure the wire.

Since I have radios that use power pole as their standard connector
and have fitted them to any that didn't including those int eh mobile unit
it allows me to move radios as needed with a consistent connectors
that can handle high current if required.  That and over time they
perform consistently.

For odd voltages the BLACK-RED is replaced with Black and some
other color Blue for 48-50V and Yellow for 28V.  Also since the
power poles allow the connectors to be assembled with specific
orientation  the odd voltages are backward (will not plug into
BLACK/RED) and three wide (center is neither ground nor power)
to protect against, oops wrong voltage.    This is a standard here.


Allison

-------------------------------
Please reply on list so we can share.
No direct email, it goes to bit bucket due address harvesting in groups.IO

Re: Power Supply for 50W Amp #supply

Gregg Myers
 

Nice! This sounds like a good option for powering the amp.
Thanks for the feedback.

73,
Gregg
w7grm

On Sun, Feb 23, 2020 at 10:55 AM ND6P <jpkellyburbank@...> wrote:
To test for heating I connected to a dummy load and ran a looped CQ for 20 minutes.  During that time I felt the amp and the converter to see how things were heating.  The amp gets the warmest.  And I lifted the lid from the converter at the end of the 20 minutes to see how warm the heat-sinks were.  They were warm to the touch but not hot.  So I think the converter will do well enough in the metal box without ventilation. The board is sitting on 1/4 inch standoffs.

Jim/ND6P

Re: Power Supply for 50W Amp #supply

ND6P
 

To test for heating I connected to a dummy load and ran a looped CQ for 20 minutes.  During that time I felt the amp and the converter to see how things were heating.  The amp gets the warmest.  And I lifted the lid from the converter at the end of the 20 minutes to see how warm the heat-sinks were.  They were warm to the touch but not hot.  So I think the converter will do well enough in the metal box without ventilation. The board is sitting on 1/4 inch standoffs.

Jim/ND6P

Re: I am trying to do a "factory reset" on my new ver 5 QCX

Craig Johnson
 

Tnx, that did the trick.  I guess I should use instructions for the version I am using.  Live and learn even at 81.
73
Craig

Re: I am trying to do a "factory reset" on my new ver 5 QCX

Gregg Myers
 

The exact menu item depends on your firmware version. On the latest version it is menu 7.10

73,
Gregg
w7grm

On Sun, Feb 23, 2020 at 10:15 AM Craig Johnson <saltcreeke@...> wrote:
When I call up 7.8 Factory Reset, I get the following msg:  Custom splsh
OFF.

How do I complete a refresh?
W7WXQ

I am trying to do a "factory reset" on my new ver 5 QCX

Craig Johnson
 

When I call up 7.8 Factory Reset, I get the following msg:  Custom splsh
OFF.

How do I complete a refresh?
W7WXQ