Date   
Re: QCX(-like) for 2m #alignment #vfo

Trevor VK3PD
 


Perhaps for a two meter converter you could try these. Aliexpress have broad band amplifier modules and balanced mixers for not a lot. Do not know what they are like but for their very low cost it would be worth trying
You would just have to add a two meter band pass filter to the above, then along with a  QCX17 and you are good to go.  Aliexpress also have SMA jumper cables for a $ or two.
You would need an amplifier and PA for the progrock for your transmitter.

Re: [MIQRPCLUB] QCX/QSX Elmering and Discussion

Ed Kwik
 

Sorry I did not get home in time for the meeting.  I thought I could get home in plenty of time but my internal clock is off.  I ran a marathon on Saturday and I am still in recovery mode.
Ed
AB8DF


On Sep 8, 2019, at 5:22 PM, Ed ekwik@... [MIQRPCLUB] <MIQRPCLUB@...> wrote:

 

Hi Everyone!
AB8DF is inviting you to a scheduled Zoom meeting.

Please join us Monday Sep 9, 2019 7:00 PM / 23:00 UTC for our next QRP Labs QCX/QSX transceiver Chat where the main topics will be the QRP Labs QCX single band CW transceiver and the soon to be released QSX multiband
CW/SSB transceiver. It's fun, it's easy, and it's free. You only need a computer, a smart phone, or a tablet that can connect to the Internet. OR if you can't be close to any of those you can join by audio with any standard phone. Just follow the directions below.

No software needs be loaded or installed.

MIQRP CLUB is inviting you to a scheduled Zoom meeting.

Topic: MIQRP QCX/QSX discussion
Time: Sep9, 2019 7:00 PM Eastern Time (US and Canada)

Join Zoom Meeting
https://zoom.us/j/200792220

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Meeting ID: 200 792 220
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Thanks
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AB8DF

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Posted by: Ed <ekwik@...>
Reply via web post Reply to sender Reply to group Start a New Topic Messages in this topic (22)

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Re: Clock kit: new firmware version 1.03

K9WIS
 

I see from the specs that the clock can work with a 2 line or 4 line display...
If I have only a 2 line display can I scroll and display line 2 and 3 or line 3 and 4 or line 4 and 1?
Just curious..when my kit comes I'll beable to answer these types of question myself

Brian K9wis

Re: QCX/QSX Elmering and Discussion

Ed Kwik
 

Keith,
There is no plan to record these meetings.  The current Zoom account plan allows recording but the storage space is limited.  More storage is available at a higher cost.  The Zoom account is provided to us from the Michigan QRP Club. They will entertain moving to a more costly plan if there is an increase in membership to offset the cost increase.  So far there hash not been much of a membership increase.
Ed
AB8DF


On Sep 9, 2019, at 9:14 AM, Keith Laaks <keith@...> wrote:

Hi
I wonder if this will be recorded?
For those of us where this starts at 1am local..... :-)

Thanks
Keith
zs6tw

Re: QCX/QSX Elmering and Discussion

N3MNT
 

Tried to attend , but kept asking me to download and install app.

Re: Clock kit: new firmware version 1.03

Bill Cromwell
 

Hi,

Where I live there are ~34 minutes between 'local' time and standard time with ~94 minutes from daylight saving time. By my sundial that is later here than the clock on the wall showing eastern time. Those time zones have their useful place in helping us with our civilization but not with our navigation. Many people today are completely oblivious to that and in fact, they don't really need to know. The GPS will do it all for them. -shrug-

I just hate when I pull into a rest area along the highway and look at the map displayed there. The location of the rest area is prominently marked and says "You are here." Another prominent marker says "You should be over here." <evil grin>

73,

Bill KU8H

On 9/9/19 3:51 PM, Dean Smith wrote:
Ok, I think it is starting to click now,. Made the incorrect assumption that  sidereal and local were linked.
I have nearly an hour of difference. With your parameters that would be about right here, with the results I have.
--
bark less - wag more

Re: QCX/QSX Elmering and Discussion

Bill Cromwell
 

Hi,

I did install the app. But. You should be able to dial in with your smart phone and participate without the app. I believe some hams have logged in that way. You are not the only person reluctant and careful about what to install. If you can't find what you need for that let me know in private email and I will try to point to the information.

Ed might also be able to point to the info.

73,

Bill KU8H

On 9/9/19 8:46 PM, Chopper wrote:
Tried to attend , but kept asking me to download and install app.
--
bark less - wag more

Re: Clock kit: new firmware version 1.03

Curt M.
 

Hi guys, did the firmware upgrade tonight and I’m seeing something strange with both of my two clocks. 

See this video. Note the bottom like. This used to work perfectly. Now it acts like it’s ignoring the pauses. 

https://youtu.be/lL-MA-dipY0


Here is my programming for that line. Note () is the solid pause square. 

#GV #GG F#GF T#GT S#GS()Lat #LT()Lon #LN()Alt #AT meters

 

 

Re: Clock kit: new firmware version 1.03

Hans Summers
 

Hi Curt

Are you sure you installed 1.03a?

This issue with timing of pauses was in 1.03 but was fixed in 1.03a. It looks like you installed 1.03. Please confirm - what do you see as version number, at power-up?

73 Hans G0UPL 

On Tue, Sep 10, 2019, 07:12 Curt M. <WU3URADIO@...> wrote:
Hi guys, did the firmware upgrade tonight and I’m seeing something strange with both of my two clocks. 

See this video. Note the bottom like. This used to work perfectly. Now it acts like it’s ignoring the pauses. 

https://youtu.be/lL-MA-dipY0


Here is my programming for that line. Note () is the solid pause square. 

#GV #GG F#GF T#GT S#GS()Lat #LT()Lon #LN()Alt #AT meters

 

 

Re: Clock kit: new firmware version 1.03

STEPHEN
 

FYI




This is a nice site

Stephen Thornber G6SGA

CFR07434
FRSPH, FBCS, CITP, CISM


Tel: +44 (0) 7917 611082

For more information about the work of Community First Responders or to become one yourself, contact West Midlands Ambulance Service Community Response Manager Noel Orbell on 07980 094808, or the CFR Admin office on 01384 215855 or CFRAdmin@...

-- CAUTION: EXTERNAL EMAIL --
Do not click links or open attachments unless you recognise the sender, are expecting the content and/or know the content to be safe.





On 9 Sep 2019, at 23:57, B C <k9wis@...> wrote:

sidereal time calculator

Re: Clock kit: new firmware version 1.03

Alan G4ZFQ
 

Just curious..when my kit comes I'll beable to answer these types of question myself
Brian,

You can find out most things by reading the manuals at http://www.qrp-labs.com/clockn.html
Any other questions can then be answered here.

73 Alan G4ZFQ

Re: QCX - Damaged Finals? (with IR photo)

Alan G4ZFQ
 

Everything works until it doesn't.  So - Q1, Q2, Q3, and Q6 show no obvious damage, and the low resistance I was reading between pins one and two on Q6 in-circuit was due to a resistor that is between them, so this is normal.
Joe,

Sorry, the first comments about Q6 confused me. Measuring resistance across transistor junctions also leads to confusion. The true reading across base-emitter of Q6 should be 470 ohms but with the test leads the other way round current flows through the transistor giving false readings.

I pulled Q6 off the board, it is not shorted.  So I'll just replace Q1-Q6, then see what happens.
Q4, Q5 are rarely faulty.
Maybe the problem is a dry joint on the LPF coils.
How far have you got with parts removal?
Voltage checks with the parts removed help confirm whether further faults are present. If there are other faults then the new ones may themselves be destroyed.
With the semiconductors removed and both RX and TX mode check voltages at IC3 pin 3. Also Q6 base, the junction of R41/42.

73 Alan G4ZFQ

Re: Clock kit: new firmware version 1.03

Hans Summers
 

Hi Brian

You can define the contents of the display, to contain multiple items with a delimiter character, and specify a delay (number of seconds) that each item is shown. So you can't exactly scroll line 3 and 4 onto 1 and 2 if you only have a 2-line display - but you can achieve the exact same effect. 

73 Hans G0UPL

On Tue, Sep 10, 2019 at 3:20 AM B C <k9wis@...> wrote:
I see from the specs that the clock can work with a 2 line or 4 line display...
If I have only a 2 line display can I scroll and display line 2 and 3 or line 3 and 4 or line 4 and 1?
Just curious..when my kit comes I'll beable to answer these types of question myself

Brian K9wis

Re: Clock kit: new firmware version 1.03

Hans Summers
 

Hi Stephen
 

Yes! This is the exact site that I used for my testing of the new Sidereal time functionality. I entered my longitude to check the Local Sidereal Time and set it to 0 to check Greenwich Sidereal Time. 

73 Hans G0UPL

Re: QCX - Damaged Finals? (with IR photo)

Guido PE1NNZ
 

Wondering if this issue is related to the instability of the RX/TX switch as described here [1]. This 10K resistor seems essential on 20m units to prevent blow-up.
The heating of Q5 and IC4 suggests that RF has been flowing into the receiver; Q5 is supposed to be off in TX but it might have been on due to instability.
While helping two other HAMs with a exactly same issue on a 20m unit, it had damaged: C33 (turned into short), Q5, Q6, Q1-3 and IC4 (RX was working but I/Q balance failed).


On Tue, Sep 10, 2019 at 8:46 AM Alan G4ZFQ <alan4alan@...> wrote:
> Everything works until it doesn't.  So - Q1, Q2,
> Q3, and Q6 show no obvious damage, and the low resistance I was reading
> between pins one and two on Q6 in-circuit was due to a resistor that is
> between them, so this is normal. 

Joe,

Sorry, the first comments about Q6 confused me. Measuring resistance
across transistor junctions also leads to confusion. The true reading
across base-emitter of Q6 should be 470 ohms but with the test leads the
other way round current flows through the transistor giving false readings.

>I pulled Q6 off the board, it is not
> shorted.  So I'll just replace Q1-Q6, then see what happens.

Q4, Q5 are rarely faulty.
Maybe the problem is a dry joint on the LPF coils.
How far have you got with parts removal?
Voltage checks with the parts removed help confirm whether further
faults are present. If there are other faults then the new ones may
themselves be destroyed.
With the semiconductors removed and both RX and TX mode check voltages
at IC3 pin 3. Also Q6 base, the junction of R41/42.

73 Alan G4ZFQ



Re: 20 Meter QCX C25/C26 replaced - output power increased markedly

DaveC
 

Joe
Thanks for the info, my QCX was exhibiting the same symptoms. Changed both C25 and C26 
now I'm up to just under 5 watts and no problems

Dave, G8PGO

Re: QCX - Damaged Finals? (with IR photo)

Alan G4ZFQ
 

While helping two other HAMs with a exactly same issue on a 20m unit, it had damaged: C33 (turned into short), Q5, Q6, Q1-3 and IC4 (RX was working but I/Q balance failed).
[1] https://www.qrp-labs.com/qcx/qcxmods.html#pa
Guido,

I had not looked too closely at the IR photo.
I remember the mod (quite a time ago!) but had not remembered the failures you report.
The 10K (R64) should be on later boards rev 3 onwards but may be soldered badly or faulty.
Check as Guido suggests Joe.

73 Alan G4ZFQ

Re: Clock kit: new firmware version 1.03

Don--AE4DW
 

On Mon, Sep 9, 2019 at 08:27 AM, Greg Walters wrote:
Thanks Don.

I'll have to check that out. The only programming I ever did was way back in middle school, I think, and that was BASIC. I don't remember much of any of it now, though I am interested. 
--
73,
Greg
KY4GW

Well, you're not writing any code, you're simply loading Hans' existing code (in a hex file) into the chip. He did all the heavy lifting (aka, programming) for us. I'm sure there is a large percentage of people who can execute the process of flashing/burning/loading the code onto the chip, and don't have any understanding of the underlying code. It's not a necessity.

That said, plenty of fun options out there to allow you to dive back into the fun of programming...and a lot of languages to choose from...sky's the limit.

 

Re: QCX/QSX Elmering and Discussion

Ed Kwik
 

Chopper,
Click on this link that is in the meeting notice:


If you do not have the app and do not want to install it click on “join from your browser” as shown below:

If nothing prompts from browser, download & run Zoom.
If you cannot download or run the application, join from your browser.
This will allow you to join the meeting without installing any app.  I have yet to hear of any browser not working.  I have tried it with Firefox, Safari and Chrome.
Ed
AB8DF


On Sep 9, 2019, at 8:46 PM, Chopper <bob@...> wrote:

Tried to attend , but kept asking me to download and install app.

Re: Clock kit: new firmware version 1.03

Curt M.
 

Hi guys, not sure why this is such a struggle getting the 1.03a hex file but if I download the one from the first page that Hans posted and flash the clock, on bootup it comes up with 1.03 and has the problem with line 2 scrolling.  I thought maybe Hans uploaded the second file and named it 1.03a so if I try changing that link to http://qrp-labs.com/images/clockkit/firmware/c1.03a.hex
which adds the "a" after 1.03 it does show me a hex file.  If I upload that file to the clock it still comes up with 1.03.  

Can someone email the 1.03a hex file.  My email address is KC3HJP at Comcast dot net

Thanks