Date   
Re: Clock speed indication #clock

geoff M0ORE
 

Thanks Alan, I haven't had time to check mine yet but surprised at the location of 118 deg W. I thought your location was IOW?

My portable GPS is an old Garmin emap so I will see what it shows.

Geoff

On 22/02/2020 16:18, Alan G4ZFQ wrote:
Geoff,

On the road, 35 Knots @ 40mph, so with the VTG turned off, the correct 4 NMEA sentences it reads speed OK.
(This agrees with my satnav, at 40mph the speedo indicated 44, what I used for this test.)

On the way back I remembered the "course" display. That did not look right but was not able to concentrate on it.
Walking across the lawn course seemed strange, displaying *.*** Single number, 3 decimal places which is what I *thought* I saw on the road. (Reminder:- Note "Number of characters to display" in the comprehensive Operating Manual.)
Putting the GPS on a laptop with u-center and walking across the lawn the chart view roughly showed my speed and direction, looking at the NMEA #RMC afterwards it confirmed that u-center was reading speed and direction.
Sample sentence:- 15:16:55    $GPRMC    151655    A    5044.90077    N    118.08357    W 1.773    41.46    210220    A*4E
(Walking NE 1.773 Knots    41.46°)
Is this the same format as the NMEA from a QLG1?

So, back to the road, sometime next week perhaps. Perhaps someone with a clock and QLG1 could check speed and direction, a crude basic check just needs battery power and a walk.

 73 Alan G4ZFQ

Possible extras for Hans to add one day?
Mph/kph conversion.
Heading "rounded" to alphabetic characters N, NE, E, maybe even 16 points?
Any chance of fully using all 20 characters of a 4x20 display in the configuration mode? Although we always have to think of using the "rectangle" symbol to save, configuration lines can be very long if many options are used.



Re: OLED screen for QCX

geoff M0ORE
 

I had a similar problem with LED displays and I cured it with separate 5 volt regulators with LM317's feeding the various parts needing 5 volts supply. Lots of inductors and caps as well. It was very noticeable with the auto dimming facility  that the radio has.

On 22/02/2020 22:09, Dean Smith wrote:
On Sat, Feb 22, 2020 at 09:21 PM, ajparent1/KB1GMX wrote:
The whine is due to the far higher current drain and likely its
amplitude will depend on the number of pixels (leds) turned
on.  Its not radiated in cases I've dealt with its conducted
through the 5V DC power bus.

I've had this issue with every LED based display I've used over the last
20 years.  Oleds too.  

Solution break the 5V DC line and inset a small resistor (10 ohms)
then on the led board add 1000uf from ground to the 5V.  
The cap is bulky but leads and resistance make its placement
require on the OLED board back where the power comes in.

As to brightness and delimiters that coding not timing.  The
internal controller is NOT completely interchangeable with 
the LCD controller and has added functions. 

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

 Ok, thanks for the info, when I get 5 minutes I shall try this and see if this takes the possibility of an oled display in the qcx more of a reality.

Re: OLED screen for QCX

ajparent1/KB1GMX
 

While your at it measure the working current drain.

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

Re: OLED screen for QCX

Dean Smith
 

On Sat, Feb 22, 2020 at 09:21 PM, ajparent1/KB1GMX wrote:
The whine is due to the far higher current drain and likely its
amplitude will depend on the number of pixels (leds) turned
on.  Its not radiated in cases I've dealt with its conducted
through the 5V DC power bus.

I've had this issue with every LED based display I've used over the last
20 years.  Oleds too.  

Solution break the 5V DC line and inset a small resistor (10 ohms)
then on the led board add 1000uf from ground to the 5V.  
The cap is bulky but leads and resistance make its placement
require on the OLED board back where the power comes in.

As to brightness and delimiters that coding not timing.  The
internal controller is NOT completely interchangeable with 
the LCD controller and has added functions. 

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

 Ok, thanks for the info, when I get 5 minutes I shall try this and see if this takes the possibility of an oled display in the qcx more of a reality.

Re: OLED screen for QCX

ajparent1/KB1GMX
 

The whine is due to the far higher current drain and likely its
amplitude will depend on the number of pixels (leds) turned
on.  Its not radiated in cases I've dealt with its conducted
through the 5V DC power bus.

I've had this issue with every LED based display I've used over the last
20 years.  Oleds too.  

Solution break the 5V DC line and inset a small resistor (10 ohms)
then on the led board add 1000uf from ground to the 5V.  
The cap is bulky but leads and resistance make its placement
require on the OLED board back where the power comes in.

As to brightness and delimiters that coding not timing.  The
internal controller is NOT completely interchangeable with 
the LCD controller and has added functions. 

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

Re: Did I fry my QCX?

Matthew Halsey <rftb_cowboy@...>
 

So did some basic checks:

Diode = OK
microcontroller pin7 = 5V
IC11 pin 3 = 5V

Next step, I will order a replacement micro controller and a couple of spare DC sockets to keep the unused plugs in :-)

Matt

On Feb 22, 2020, at 7:34 AM, Matthew Halsey via Groups.Io <rftb_cowboy@...> wrote:

Gregg,

Thanks.  I will start here and see where it leads.

Matt

On Feb 21, 2020, at 11:36 PM, Gregg Myers <gregg.w7grm@...> wrote:

Hi Matt,

The microcontroller doesn't need much to produce a display (as you say, it was working before). I would check for 5v on pin 7 of the microcontroller. Also check for 5v on the output of IC11 (voltage regulator).

If you had access to a scope I would check to see if the microcontroller clock is working.

As a guess, I would think your microprocessor bit the dust, but as mentioned you might measure all voltage readings as per the guidelines might indicate what else might have failed.

You could also try reprogramming the microprocessor with an AVR programmer if you know how to do that. If the AVR programmer can't talk to it, I would bet it's toast.

73,
Gregg

On Fri, Feb 21, 2020 at 8:10 PM Matthew Halsey via Groups.Io <rftb_cowboy=yahoo.com@groups.io> wrote:
This guide, referencing my condition,  really only suggests that the IC has been inserted incorrectly or is faulty.  I don’t know which section would help me take key measurements to determine if this is just the IC or if anything else has been damaged.

Matt


On Feb 21, 2020, at 8:10 PM, Ronald Taylor <wa7gil@...> wrote:


Matt, start by reading Hans’ excellent troubleshooting procedure here:   https://qrp-labs.com/qcx/qcxtrouble.html.
This gives a lot of good information on how the circuit is supposed to work. Next, do the voltage checks and report back what you find. That really helps with remote diagnostics like this. As others have indicated, 12V on the 5V line can do lots of ugly things, but 12 volts on the “key” may have only damaged the microprocessor. It would be great if you had another one to drop in and see if that’s all that went.

Ron

On Fri, Feb 21, 2020 at 5:38 PM ajparent1/KB1GMX <kb1gmx@...> wrote:
Paul K2DB,

That will not save you from....

Applying excessive voltage (like 20V to a 12 V radio).
Applying 12V to a 5V input (key or TX control).
ESD from winter static sparks.
Dropping things into the radio (wire clippings random wires connected to power or anything metallic).

And the eternal favorite... Mis connection of the protective device resulting in one of the above.

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






Re: BPF 80m

Andrew Lenton
 

 Hi,

 

I have made the 80M BPF I have checked the hot ends of the coils and the direction of the windings all good , and the best I can get is below response:

 

Components:

 

C2 and C5    470 PF

C3/4            49PF

T1 and T2 3.8 µH

 

I was hoping for less than 6dB loss, but in the big scheme of things, when listening to 80M on my K3S; I normally have some 12 dB of attenuation in, the important issue is to minimise out of band signals.

73 Andrew


Re: OLED screen for QCX

Dean Smith
 

Yep 3,15,16 not connected. No difference :(

Re: Clock speed indication #clock

Alan G4ZFQ
 

Geoff,

On the road, 35 Knots @ 40mph, so with the VTG turned off, the correct 4 NMEA sentences it reads speed OK.
(This agrees with my satnav, at 40mph the speedo indicated 44, what I used for this test.)

On the way back I remembered the "course" display. That did not look right but was not able to concentrate on it.
Walking across the lawn course seemed strange, displaying *.*** Single number, 3 decimal places which is what I *thought* I saw on the road. (Reminder:- Note "Number of characters to display" in the comprehensive Operating Manual.)
Putting the GPS on a laptop with u-center and walking across the lawn the chart view roughly showed my speed and direction, looking at the NMEA #RMC afterwards it confirmed that u-center was reading speed and direction.
Sample sentence:- 15:16:55 $GPRMC 151655 A 5044.90077 N 118.08357 W 1.773 41.46 210220 A*4E
(Walking NE 1.773 Knots 41.46°)
Is this the same format as the NMEA from a QLG1?

So, back to the road, sometime next week perhaps. Perhaps someone with a clock and QLG1 could check speed and direction, a crude basic check just needs battery power and a walk.

73 Alan G4ZFQ

Possible extras for Hans to add one day?
Mph/kph conversion.
Heading "rounded" to alphabetic characters N, NE, E, maybe even 16 points?
Any chance of fully using all 20 characters of a 4x20 display in the configuration mode? Although we always have to think of using the "rectangle" symbol to save, configuration lines can be very long if many options are used.

Re: QCX challenge on monday 24.2.2020

Eng. Fabio Barroso <fbbrito@...>
 

Hi,

My name is Fabio from Brazil, my callsign is PT7CA. That is a good ideia, I will be present in this day over the ether in 40 meters band. I have assembled my QCX recently with guide step by step and everything's all right and Hans helped me a lot by mail.

I am send a picture of my transceiver. My enclousure of BamaTech hasn't arrived by post yet.

73 for all Hams. 




Em sáb, 22 de fev de 2020 às 10:09, Peter <peter.knorr@...> escreveu:

Hallo,
i plan to be qrv on monday 13z for the qcx challenge with my 40m QCX. Hpe condx are good

73
Peter OE1OPW Vienna

--
Fábio Barroso Brito
Engenheiro de Telecomunicações
CREA 061787033-0 

Re: How I do a "factory Reset" on the QCX

N3MNT
 

Go to Menu item 7.8 and do factory reset.

How I do a "factory Reset" on the QCX

Craig Johnson
 

I did not set my newly built QCX to 40 meters.  It is locked on 80, 

Re: OLED screen for QCX

Tim
 

Thanks for that Dean. Bit disappointing as you say. How are you adjusting the gain, is it working via R47 on the QCX? Looking at the datasheet for the Winstar, pin 3 is NC which I assume means not connected. Pin 3 on the standard LCD is labelled as contrast adjustment. Also pins 15 and 16 are NC. Would it be worth removing those pins from the display? Bit of a stab in the dark as I'm no expert in electronics.

Re: OLED screen for QCX

Dean Smith
 

And to add, my QCX40 is metal cased.
OLED wise a little dissapointed, anyone else got an idea???

Re: 40m Build Problems - Voltage Readings Seem Off #40m #qcx #qcx40

James Daldry W4JED
 

Friends, Romans, and Countrymen

Just looked in my Gmail today and saw - Electronic Goldmine (goldmine-elec.com) has,for today and Sunday, Kester 24-6337-0027 63/37 .031" solder at $19.95 a pound. It's $24.61 on Amazon (might be better deal, shipping costs) and $33 and up everywhere else.

73

Jim W4JED

On 2/19/20 11:59 PM, Mike wrote:
I just wanted to quickly express how absolutely blown away at the guidance provided on this thread. Alan, Jim, I appreciate the explanation of the workings of this circuit. And to everyone else thank you for the helpful bits of advice on soldering and assembly. This is the first electronics kit I've ever built, and I'm both heartened and motivated by the support. I'm working on this build with my 13 year old son who is also learning CW along with me. Tomorrow I'm going to pick up some extra solder and supplies and see if we can get the kit working, based on all the advice received so far. I'll post back here on the results. Thanks again!

73,
Mike (KN6EZE)

QCX challenge on monday 24.2.2020

Peter
 

Hallo,
i plan to be qrv on monday 13z for the qcx challenge with my 40m QCX. Hpe condx are good

73
Peter OE1OPW Vienna

Re: OLED screen for QCX

Dean Smith
 

Ok,
Tried shielding the display connectors and earthing, no difference. :-(
Reminds me of synth whine on early radios 70s-80s icom ic-27E, ic-290 ect
with no characters on screen there is no noise. This rises as more appear.
With the LCD connected and gain on minimum i have no noise!.
i suspect this oled noise would appear along the connectors on the oled rather than RF.
Maybe the timing has something to do with this???
When i use this display for the Clock tis fine. no audio required! Just displays time!
The menu for the clock is also random across both lines. So i just set up the clock with LCD, then switch displays and repower!
I think the winstar goes some way to being compatible, just dosent quite make it enought for me to permanently change QCX
display just yet. Ebay sells a larger 1602 lcd in green/yellow or blue Larger-1602-16X2-162-Big-Character-LCD-Module-Display-Screen-LCM-White-on-Blue/192191443476?hash=item2cbf80b214:g:OJ0AAOSwrhBZHr7K these work fine , they have a non standard arrangement for pinouts on the connector light led at pin1+2 reversed, normally 15 and 16 but work fine! just needs a bigger enclosure.

Re: Did I fry my QCX?

Matthew Halsey <rftb_cowboy@...>
 

Gregg,

Thanks.  I will start here and see where it leads.

Matt

On Feb 21, 2020, at 11:36 PM, Gregg Myers <gregg.w7grm@...> wrote:

Hi Matt,

The microcontroller doesn't need much to produce a display (as you say, it was working before). I would check for 5v on pin 7 of the microcontroller. Also check for 5v on the output of IC11 (voltage regulator).

If you had access to a scope I would check to see if the microcontroller clock is working.

As a guess, I would think your microprocessor bit the dust, but as mentioned you might measure all voltage readings as per the guidelines might indicate what else might have failed.

You could also try reprogramming the microprocessor with an AVR programmer if you know how to do that. If the AVR programmer can't talk to it, I would bet it's toast.

73,
Gregg

On Fri, Feb 21, 2020 at 8:10 PM Matthew Halsey via Groups.Io <rftb_cowboy=yahoo.com@groups.io> wrote:
This guide, referencing my condition,  really only suggests that the IC has been inserted incorrectly or is faulty.  I don’t know which section would help me take key measurements to determine if this is just the IC or if anything else has been damaged.

Matt


On Feb 21, 2020, at 8:10 PM, Ronald Taylor <wa7gil@...> wrote:


Matt, start by reading Hans’ excellent troubleshooting procedure here:   https://qrp-labs.com/qcx/qcxtrouble.html.
This gives a lot of good information on how the circuit is supposed to work. Next, do the voltage checks and report back what you find. That really helps with remote diagnostics like this. As others have indicated, 12V on the 5V line can do lots of ugly things, but 12 volts on the “key” may have only damaged the microprocessor. It would be great if you had another one to drop in and see if that’s all that went.

Ron

On Fri, Feb 21, 2020 at 5:38 PM ajparent1/KB1GMX <kb1gmx@...> wrote:
Paul K2DB,

That will not save you from....

Applying excessive voltage (like 20V to a 12 V radio).
Applying 12V to a 5V input (key or TX control).
ESD from winter static sparks.
Dropping things into the radio (wire clippings random wires connected to power or anything metallic).

And the eternal favorite... Mis connection of the protective device resulting in one of the above.

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





Re: m0ron

M0RON
 

Not only do I have a very similar T shirt, I have the cap with my call embroidered on it as well. 
Andy
M0RON
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

40 Meter QCX no RF out #40m #qcx40 #qcx #problem

Greg Walters
 

This is just a cursory start...

I loaned my 20 and 40 meter QCXs out to a friend for Winter Field day. He said he couldn't get any power out. He brought them back last week, and I just got a chance to look at them. 

Sure enough, neither had RF power out. I found a full 5 watts on Q1, Q2, and Q3 on my 20 meter QCX. Then on that same side, about 1.37 watts on L1. On the antenna side, 0 watts. I checked continuity and it was fine. So I decided to do a "reboot" and reset the radio to factory. I then went back through all the alignment and everything had changed. It still worked out fine. After the alignment, I checked RF again and voila, 5.3 watts out with 13 volt input. I was back in business on the 20 meter QCX.

On to the 40 meter QCX. I had a little incident when I plugged in power and melted the wire between my battery and the radio. Nothing inside the radio got hot. So, that complicated this troubleshooting. I went through and checked RF as before, 0. Checked the Qs, 0 watts. Checked Clk1, no voltage, Clk0, 1.7 volts. T1, pins 5, 6, 7, and 8, all at 1.72-1.79 volts. Tops of C43-46 all 1.7+-.    I decided to try that "reboot" that worked for the 20. I went back through and realigned everything, and this one wasn't far off. I didn't have to make many adjustments. I checked output again, 0 watts. I checked Clk1 and Clk0, both at 1.73.  There was no change on T1, or C43-46. Pin 3 on IC5 is 1.73 and one of either 5, 6, or 7 was also 1.7. Pin 8 was 12+ volts, perfect battery voltage. 

I checked RF again, 0 watts. The Qs again, 0 watts. 

I have to work for the next few days, so I won't be able to troubleshoot until next Tuesday or later. 

I will continue down the DC voltage readings, but would like some input from anyone who might have experienced something like this. That way I can have some idea of where my problem might be. 

Thanks for any information.
--
73,
Greg
KY4GW