Date   

Re: Ultimate 3S and separete receiver #chat

KEN G4APB
 

Hi Stuart,
The basic U3S is Tx only. You have to buy the receiver module and SSB polyphase module kits too and read the manual on how to link these modules with either the U3S Tx or LO module kits. The firmware v3.12a has the 'RX' option on the Tx for this reason but you can use it as Tx delay period.. Sorry, I thought you already had a U3 Rx, if you plan to use some other receiver then all you need is the external antenna changeover setup.

73 Ken G4APB


Re: U3S doesn't always sync time on startup

N1BUG
 

Thanks to everyone who replied. The important thing is that I
learned it's not just me. Therefore, I won't go digging around in
what is probably a perfectly healthy U3S looking for a hardware
fault that probably doesn't exist. ;-)

I thought about leaving mine on permanently. I wired the second
toggle switch to disconnect +5V from the single BS170 which allows
it to stay on without putting out a signal. I've used it for short
QRX periods but have been nervous about leaving it that way for a
long time. I have no idea what kind of load CLK0 is looking at when
there's no voltage on the PA. Can any potential harm come of this?
Guess I just need to be brave and try it. :-)

73,
Paul N1BUG


Re: U3S doesn't always sync time on startup

Andrew Lenton
 

Hi I have seen this as well but it does recover over time. Cold start after 10 mins rest, also does the trick.

 

Mine has Been on now for 2 months and not missed a beat. cycling through 5 bands with a 3 min cal period

73

 

3.12 software

 

Andrew

 

Sent from my Windows 10 phone

 

From: N1BUG
Sent: 17 March 2018 23:17
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] U3S doesn't always sync time on startup

 

Next time it happens I will try that. The trick with me is

remembering to watch out for it since this only happens occasionally

and I am easily distracted.

 

73,

Paul

 

 

On 03/17/2018 06:59 PM, Al Holt wrote:

> What you've describes sounds like what my U3S does; I have the same

> issue. I'm in the habit now of after powering up the unit, press the

> left button and step through the whole menu system, press right

> button to get back normal operation. 

>

> The U3S now goes into a calibration routine and will have the right

> time at the end of the sequence. I'm on the current firmware.

>

> --Al

> WD4AH

 

 

 


Re: U3S doesn't always sync time on startup

Chris Wilson
 

Hello Paul,

I just leave mine on all the time, it's been on 24 / 7 for months, so
not sure if it does this or not. I'm not very "Green" I'm afraid....

Saturday, March 17, 2018

Next time it happens I will try that. The trick with me is
remembering to watch out for it since this only happens occasionally
and I am easily distracted.
73,
Paul





--

2E0ILY
Best regards,
Chris mailto:chris@chriswilson.tv
--
Best regards, Chris Wilson (2E0ILY)


Re: Soldering iron recommendations

Roger Hill
 

Just for the record, I ending up buying the Antex 660A - rotary dial type. Turns out made in China, so we will see how it goes. My first day's use was just fine. Very quick to get to temperature, and seems to hold temperature well.


Roger

G3YTN

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


On 2018-03-10 22:45, Ken KM4NFQ wrote:

This is a wiring diagram for a soldering iron temperature controller
that uses a 600W light dimmer and an outlet:

I used an old 3-wire computer power cord, some wirenuts,
and an outlet, all of which were stuffed in a 4x4 electrical box
with a lid that was configured for a switch and an outlet.

Regards,
Ken, KM4NFQ "Not Fully Qualified"


On Sat, Mar 10, 2018 at 5:35 PM, Ken KM4NFQ <km4nfq@...> wrote:
Make a DIY temperature controller from a $5 600W light dimmer plus parts:
Plug a $10 to $15 Chinese eBay soldering iron up to it.

Temperature controlled soldering station for less than $30 USD.

I made one of these several years ago, and it works fine.
It was 'calibrated' with the thermocouple that came with my DMM.
I used a Sharpie to mark different temperatures. It's close enough for hobby work.
I do most of my soldering with the dimmer set to about 350degF.

Very easy to make. Very easy to use. Very inexpensive.

Regards,
Ken, KM4NFQ "Not Fully Qualified"
 


Re: U3S doesn't always sync time on startup

Roger Hill
 

I have the same problem - GPS locks nicely, but the time does not update. A quick power off/on fixes it 99.9% of the time.

Roger
G3YTN

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

On 2018-03-17 23:17, N1BUG wrote:
Next time it happens I will try that. The trick with me is
remembering to watch out for it since this only happens occasionally
and I am easily distracted.
73,
Paul
On 03/17/2018 06:59 PM, Al Holt wrote:
What you've describes sounds like what my U3S does; I have the same
issue. I'm in the habit now of after powering up the unit, press the
left button and step through the whole menu system, press right
button to get back normal operation. 
The U3S now goes into a calibration routine and will have the right
time at the end of the sequence. I'm on the current firmware.
--Al
WD4AH


Re: BPF trimmer sensitive to screwdrivier touch?

Hans Summers
 

Hi Alan

Ideally the screw of the trimmer capacitor should be the ground side. But in the QCX it is indeed the "wrong" way around... so a metal screwdriver has an undesirable effect. It IS an expected behaviour.

Roger: in the standard BPF kit http://qrp-labs.com/bpfkit used in the receiver module http://qrp-labs.com/receiver the trimmer capacitor is the "right" way round. The screw is the ground side. So using a metal trimming tool should have much less effect. However there is still SOME effect so out of habit I still just use a ceramic-bladed tool. You can see me pointing at everything with it in the video https://www.youtube.com/watch?v=VlMOZistkCs

73 Hans G0UPL

On Sat, Mar 17, 2018 at 11:42 PM, Roger Hill <rhill@...> wrote:
I get the same thing with the standalone receiver module.

Roger
G3YTN

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

On 2018-03-17 20:39, g3xaq wrote:
I did notice one thing during alignment: when peaking the receiver BPF
trimmer the level changes (and I get noise on the audio) when I apply
a metal screwdriver to the trimmer. Is this expected? I've checked and
I do have the trimmer inserted the right way round: it is aligned with
the silk screened component overlay.

Before I go in gung-ho with a soldering iron and risk damaging the
trimmer and/or PCB, is this expected behaviour or not?

73, Alan G3XAQ







New QCX

Will, AI4VE
 

QCX SN 3482 is operational!  The kit was ordered as a 30m model but I changed my mind and built it for 20m. Finished last evening and it powered up with no issues. The calibration was a breeze thanks to the built in test functions. Plugged in an antenna and answered a CQ from NN6T in AZ. He gave me a 579 report and was surprised when I told him I was running less than 5W with an attic dipole. I’m getting 3.5W with 12.3v input. I think I’m going to have fun with this little gem. 

Will, AI4VE


Re: Sudden failure in early life

Steve in Okinawa
 

It looks the same on the CHOP setting. Thanks

Steve Fabricant

On Mar 18, 2018, at 12:19, "whend@..." <whend@...> wrote:

Glen, Steve

It looks like the VERT MODE on the scope is set to ALT, so any timing relation between channel 1 and 2 is probably meaningless.

73,
Warren K2GQT


Re: Sudden failure in early life

whend@...
 

Glen, Steve

It looks like the VERT MODE on the scope is set to ALT, so any timing relation between channel 1 and 2 is probably meaningless.

73,
Warren K2GQT


Re: Sudden failure in early life

Glen Leinweber
 

Steve,
That's OK - I2C communication between processor and Si5351A is a whole other topic.
Good news is that your processor is alive and clocking. It is just having trouble
waking up the Si5351A.
What to do?
It is possible that they're out-of sync. Don't know why that should happen, but a reset
to the processor might jog it  so they're dancing to the same beat.

So power up, and get your blank display.
Then momentarily short the "RESET" line to "GND" on the 6-pin "Prog Header".
Also called "ISP" header.
It sits directly below the power connector where +12V comes in.
Top left pin gets shorted to top right pin, just for a quick moment.
That reset might get you past the power-up transactions, and into working mode.
Something to try before replacing the processor.


Re: Sudden failure in early life

Steve in Okinawa
 

Thanks for this diagnostic, Glen. Since i just started yesterday from the, "Doctor, I don't feel well" level, I have no idea what all that actually means, not to mention what to do about it. I'm an old RF guy but in the dark ages with microprocessors.

73 from Okinawa

Steve Fabricant JS6TMW 

On Mar 18, 2018, at 4:57, Glen Leinweber <leinwebe@...> wrote:

Steve,
Your I2C transaction looks to be corrupted.
I have transformed your 'scope image (below).
SDA should rise between transactions. It doesn't.
"ACK" looks to come in the middle of a transaction (should come at the end.

Am guessing a power-up problem. Perhaps a slow rise in the DC supply?
In any case, looks like SI5351A sees a I2C framing error.
<i2c.jpg>


Re: BPF trimmer sensitive to screwdrivier touch?

David Wilcox K8WPE
 

No, just too much trial and error. With the ceramic ones you know where you are before you remove the tuning device. I also have damaged some cores on old if cans with metal but the ceramic seems to be a little softer, fits better. Anyway, I like the ceramic. I have a handful of the old plastic and fiber ones too from the old days but the ceramic ones seem to work better than those too.

I am just a fool for newer and more tools in my shop. Ha!

Dave K8WPE

On Mar 17, 2018, at 8:07 PM, Jess Gypin <ontarget1911@gmail.com> wrote:

I’ve used them all. Metal screw driver, just stick it in there, make a tweak and then pull it out to see what happens. What’s the big deal brain damage?

On Mar 17, 2018, at 5:07 PM, David Wilcox via Groups.Io <Djwilcox01=yahoo.com@groups.io> wrote:

I use ceramic screw drivers to adjust any tuned circuit part. The metal screw driver will change the frequency by detuning the coil or trimmer cap. There are some plastic tuning wands a available too but I like my ceramic set. Just look for ceramic screw drivers at Amazon. $10 to $14 a set.

Dave K8WPE

On Mar 17, 2018, at 4:39 PM, g3xaq <alan@g3xaq.net> wrote:

I did notice one thing during alignment: when peaking the receiver BPF trimmer the level changes (and I get noise on the audio) when I apply a metal screwdriver to the trimmer. Is this expected? I've checked and I do have the trimmer inserted the right way round: it is aligned with the silk screened component overlay.

Before I go in gung-ho with a soldering iron and risk damaging the trimmer and/or PCB, is this expected behaviour or not?

73, Alan G3XAQ


Re: BPF trimmer sensitive to screwdrivier touch?

Jess Gypin <ontarget1911@...>
 

I’ve used them all. Metal screw driver, just stick it in there, make a tweak and then pull it out to see what happens. What’s the big deal brain damage?

On Mar 17, 2018, at 5:07 PM, David Wilcox via Groups.Io <Djwilcox01=yahoo.com@groups.io> wrote:

I use ceramic screw drivers to adjust any tuned circuit part. The metal screw driver will change the frequency by detuning the coil or trimmer cap. There are some plastic tuning wands a available too but I like my ceramic set. Just look for ceramic screw drivers at Amazon. $10 to $14 a set.

Dave K8WPE

On Mar 17, 2018, at 4:39 PM, g3xaq <alan@g3xaq.net> wrote:

I did notice one thing during alignment: when peaking the receiver BPF trimmer the level changes (and I get noise on the audio) when I apply a metal screwdriver to the trimmer. Is this expected? I've checked and I do have the trimmer inserted the right way round: it is aligned with the silk screened component overlay.

Before I go in gung-ho with a soldering iron and risk damaging the trimmer and/or PCB, is this expected behaviour or not?

73, Alan G3XAQ





Re: Hans, please weigh in on suggested fixes or improvements #qcx

Steve
 

This is a good question.

 

I've built 3 QCXs and all of them had a slow decay in semi break-in mode. Changing R41 to 220 ohms fixed that on all of them.

 

All 3 also had a thump in the sidetone. Changing C22 to 0.1uf fixed that on all 3, and made the sidetone sound sweet.

 

I'm not complaining because I love this little radio. Making changes and tweaking things is a big part of the fun for me. 😀

 

Maybe Hans has a reason for not endorsing these changes, but if one uses them it's much easier to do while building the kit because it's a bit of a PIA to unsolder parts and/or acquire more parts if one doesn't have them.

 

Steve, N4IAG


Re: U3S doesn't always sync time on startup

N1BUG
 

Next time it happens I will try that. The trick with me is
remembering to watch out for it since this only happens occasionally
and I am easily distracted.

73,
Paul

On 03/17/2018 06:59 PM, Al Holt wrote:
What you've describes sounds like what my U3S does; I have the same
issue. I'm in the habit now of after powering up the unit, press the
left button and step through the whole menu system, press right
button to get back normal operation. 

The U3S now goes into a calibration routine and will have the right
time at the end of the sequence. I'm on the current firmware.

--Al
WD4AH


Re: BPF trimmer sensitive to screwdrivier touch?

David Wilcox K8WPE
 

I use ceramic screw drivers to adjust any tuned circuit part. The metal screw driver will change the frequency by detuning the coil or trimmer cap. There are some plastic tuning wands a available too but I like my ceramic set. Just look for ceramic screw drivers at Amazon. $10 to $14 a set.

Dave K8WPE

On Mar 17, 2018, at 4:39 PM, g3xaq <alan@g3xaq.net> wrote:

I did notice one thing during alignment: when peaking the receiver BPF trimmer the level changes (and I get noise on the audio) when I apply a metal screwdriver to the trimmer. Is this expected? I've checked and I do have the trimmer inserted the right way round: it is aligned with the silk screened component overlay.

Before I go in gung-ho with a soldering iron and risk damaging the trimmer and/or PCB, is this expected behaviour or not?

73, Alan G3XAQ



Re: U3S doesn't always sync time on startup

Al Holt
 

What you've describes sounds like what my U3S does; I have the same issue. I'm in the habit now of after powering up the unit, press the left button and step through the whole menu system, press right button to get back normal operation. 

The U3S now goes into a calibration routine and will have the right time at the end of the sequence. I'm on the current firmware.

--Al
WD4AH


U3S doesn't always sync time on startup

N1BUG
 

Hi,

I am just wondering if others have seen this or whether I should be
looking for a problem in my U3S/QLG1. Most of the time when I switch
it on, it syncs time within 20 to 50 seconds. Occasionally it fails
to sync time even though the GPS status message says it has acquired
satellites and has a fix. Correct coordinates are being shown. In
all such cases, powering the unit off, then on again causes an
immediate time sync.

The U3S is running firmware v. 3.12. I have the QLG1 mounted in the
QRP Labs case with the U3S, using an external active antenna mounted
on a metal cabinet. GPS signal strength looks good and it always
acquires satellites.

73,
Paul N1BUG


Re: QCX CW Beaconing #qcx

Al Holt
 

John,
Thanks for your helpful suggestions. I had a bit of a go with QRSS during the QRSS New Year's festival (I think it was). My U3S really didn't cut the mustard as far as stability went and my plans to reconfigure it are on the shelf for now. I do a lot of WSPR transmitting and just looking to get more time on the QCX. I've burned out one set of finals and taken some measures to prevent it happening again. 

But yes, I could set up shop just at the bottom of 40m QRSS-land, say 7,039,703 Hz, and send some ID-Grid-73's, right?

Thanks!!

--Al