Re: IW2DZX WSPR

g3zjo

On 21/05/2013 23:02, Andy Cutland wrote:
My U2 kit was also very happy on 10m wspr. I moved it to 20m now and all is well there too.As the other Andy says, more confusion. Although I remember you having your signal on 28MHz WSPR on your Grabber and the tone spacing was most strange, stretched at the bottom. Probably WSPR can handle this but not the skinny mode that mine produces.


73 Eddie G3ZJO

Re: IW2DZX WSPR

"andyfoad@..."

#1183

Oh no - more confusion ;-)

73 de Andy

Show quoted text

--- In QRPLabs@..., Hans Summers <hans.summers@...> wrote:

All

Amazingly, Aldo IW2DZX continues to operate 10m WSPR successfully with the
Ultimate2 kit, see 

Aldo tells me that he is using 3x BS170 transistors in the PA, operated at
5V. Antenna is a half-wave end fed.

With all the other observations on 10m operation, it seems amazing to me
that Aldo is having success. Weird!

73 Hans G0UPL

Re: IW2DZX WSPR

Andy Cutland

#1182

My U2 kit was also very happy on 10m wspr. I moved it to 20m now and all is well there too.

73's
Andy
Gj7rwt

:------------------------------

Show quoted text

On Tue, May 21, 2013 2:02 PM PDT Hans Summers wrote:

All

Amazingly, Aldo IW2DZX continues to operate 10m WSPR successfully with the
Ultimate2 kit, see 

Aldo tells me that he is using 3x BS170 transistors in the PA, operated at
5V. Antenna is a half-wave end fed.

With all the other observations on 10m operation, it seems amazing to me
that Aldo is having success. Weird!

73 Hans G0UPL

Re: GPS behaviour very inconsistent

Hans Summers

#1181

It's quite entertaining that ADAfruit call it the "Ultimate GPS module".... ? and here we are playing with what *I* called the "Ultimate" QRSS kit!

73 Hans G0UPL

Show quoted text

On Tue, May 21, 2013 at 3:00 PM, Keith Maton <nentecular@...> wrote:

?
On 21 May 2013, at 14:37, Barry Chambers <b.chambers@...> wrote:
?
On 20/05/2013 21:43, Keith Maton wrote:

?

Since I added battery backup to my GPS module at the weekend things are more consistent.?

When I apply power, the clock shows and it's normally accurate to within a few seconds. ?I put the GPS invert to off and the clock shows correct. ?I put the invert back to on and it stays correct without drifting. I've been running WSPR for over 24 hours on 30m/20m with no problems.

I'm very pleased to have been seen in VK land on 20m WSPR this afternoon.

73 Keith, G6NHU
--

On 17 May 2013, at 10:35, Keith Maton <nentecular@...> wrote:

?
All,

Following on from my other emails yesterday, last night I restarted everything again only this time the U2 and GPS were switched off for an hour or so while I worked GB70DAM on 40m.

Once I started it up and the GPS locked, the clock once again was showing 00:00:00. I inverted the input and the time showed correctly.

Today, over 12 hours later, it's still correct to the second! Compare that to yesterday when it was rapidly losing time.

73 Keith, G6NHU

Keith

which gps module are you using?
--

73

Barry, G8AGN
I've got an adafruit GPS unit ()

73 Keith, G6NHU

IW2DZX WSPR

Hans Summers

#1180

All

Amazingly, Aldo IW2DZX continues to operate 10m WSPR successfully with the Ultimate2 kit, see

Aldo tells me that he is using 3x BS170 transistors in the PA, operated at 5V. Antenna is a half-wave end fed.?

With all the other observations on 10m operation, it seems amazing to me that Aldo is having success. Weird!

73 Hans G0UPL

Re: QRSS ARDUINO shield questions

Hans Summers

#1179

Hi Colin

Yes, I see. Yes, you can provide a battery voltage > 7V, through the Vin pin, on my QRSS Arduino shield. The QRSS shield provides access to all the usual Arduino connectors on the two 6-pin and two 8-pin headers - which includes Gnd and the Vin pin.?

73 Hans G0UPL

Show quoted text

On Tue, May 21, 2013 at 8:29 AM, dd5cf_colin <jobaco@...> wrote:

?

Hi Hans here is the link:

it is about 1/4 of the page down.

73 Colin

--- In QRPLabs@..., "dd5cf_colin" wrote:
>
>
>
> --- In QRPLabs@..., Hans Summers wrote:
> >
> > Hi Colin
> >
> > > If I run the ARDUINO UNO on battery power can I connect it to GND and Vin
> > > (as recommend by the arduino website) through your QRSS shield?
> > >
> > All of the standard Arduino pins are fed through the shield in the standard
> > way. So if the website recommends that the Arduino can be powered by Gnd
> > and Vin through a shield, this would apply to the QRSS shield too. But to
> > be sure: can you provide a link to the part of the website that you are
> > referring to?
> >
> > 73 Hans
> >
>

Re: U2 Frequency and 1PPs

g3zjo

#1178

On 21/05/2013 18:51, peter_helm@... wrote:
How do I know when the U2 is frequency synchronized to the 1PPS.The DDS oscillator will have its calibration figure altered by the GPS 1PPS, changing up or down from 125 000 000 and of course the signal output will be accurately on frequency. Providing you have followed the instructions re non continuous TX of Mode.

Also if you are not using the GPS Data input the manually set time will keep accurate to the second.

73 Eddie G3ZJO

U2 Frequency and 1PPs

"peter_helm@..."

#1177

Might not be a silly question.
How do I know when the U2 is frequency synchronized to the 1PPS.
73 Peter G8AEN

Re: GPS behaviour very inconsistent

Keith Maton

#1176

开云体育

On 21 May 2013, at 14:37, Barry Chambers <b.chambers@...> wrote:

?
On 20/05/2013 21:43, Keith Maton wrote:

?

Since I added battery backup to my GPS module at the weekend things are more consistent.?

When I apply power, the clock shows and it's normally accurate to within a few seconds. ?I put the GPS invert to off and the clock shows correct. ?I put the invert back to on and it stays correct without drifting. I've been running WSPR for over 24 hours on 30m/20m with no problems.

I'm very pleased to have been seen in VK land on 20m WSPR this afternoon.

73 Keith, G6NHU
--

On 17 May 2013, at 10:35, Keith Maton <nentecular@...> wrote:

?
All,

Following on from my other emails yesterday, last night I restarted everything again only this time the U2 and GPS were switched off for an hour or so while I worked GB70DAM on 40m.

Once I started it up and the GPS locked, the clock once again was showing 00:00:00. I inverted the input and the time showed correctly.

Today, over 12 hours later, it's still correct to the second! Compare that to yesterday when it was rapidly losing time.

73 Keith, G6NHU

Keith

which gps module are you using?
--

73

Barry, G8AGN

I've got an adafruit GPS unit ()

73 Keith, G6NHU

Re: GPS behaviour very inconsistent

Barry Chambers

#1175

开云体育

On 20/05/2013 21:43, Keith Maton wrote:

?

Since I added battery backup to my GPS module at the weekend things are more consistent.?

When I apply power, the clock shows and it's normally accurate to within a few seconds. ?I put the GPS invert to off and the clock shows correct. ?I put the invert back to on and it stays correct without drifting. I've been running WSPR for over 24 hours on 30m/20m with no problems.

I'm very pleased to have been seen in VK land on 20m WSPR this afternoon.

73 Keith, G6NHU
--

On 17 May 2013, at 10:35, Keith Maton <nentecular@...> wrote:

?

All,

Following on from my other emails yesterday, last night I restarted everything again only this time the U2 and GPS were switched off for an hour or so while I worked GB70DAM on 40m.

Once I started it up and the GPS locked, the clock once again was showing 00:00:00. I inverted the input and the time showed correctly.

Today, over 12 hours later, it's still correct to the second! Compare that to yesterday when it was rapidly losing time.

73 Keith, G6NHU

Keith

which gps module are you using?

-- 

73

Barry, G8AGN

Re: GPS behaviour very inconsistent

Keith Maton

#1174

开云体育

Tony,

I've got an adafruit GPS unit ()?which I've connected using four wires to the U2 kit: ?1pps, +V, gnd and data. ?It has the ability to run with a battery backup for quicker acquisition and ?data logging, that's the battery I added at the weekend.

As for the supply, I run with 13.8V through a heatsinked 7805 regulator onto the U2 and from there out to the GPS module.

This morning I've done some more testing - I reset the invert GPS option to OFF and power cycled the U2. ?In this configuration, the time appears within a couple of seconds of power on and it's accurate. ?It's been running for a few hours now and it's stayed accurate.

I hope that helps.

73 Keith.

Show quoted text

On 21 May 2013, at 07:54, Tony Volpe <tony.volpe.1951@...> wrote:

?

Keith,

Could you say more about the battery backup you added? What is the exact voltage on your system? How is it different to what you had before? I have not been able to get my EM-406A to operate with the new kit, but it is working fine on the old one. In my case, the clock will not appear and the kit won't start when I set USE GPS to ON. If I set the invert GPS parameter to invert (which is wrong for the GPS, the clock appears, and the kit starts and will transmit on schedule, but the clock runs fast and within a minute or two is well out of sync with real time. This corrects momentarily when the transmit cycles end and then it runs away again.

If you have found a solution, I'd be well pleased. :))

The kit works well in every other way that I have tried, but I've only been using WSPR.

Tony
G0BZB

On 20 May 2013 21:43, Keith Maton <nentecular@...> wrote:

?

Since I added battery backup to my GPS module at the weekend things are more consistent.?

When I apply power, the clock shows and it's normally accurate to within a few seconds. ?I put the GPS invert to off and the clock shows correct. ?I put the invert back to on and it stays correct without drifting. I've been running WSPR for over 24 hours on 30m/20m with no problems.

I'm very pleased to have been seen in VK land on 20m WSPR this afternoon.

73 Keith, G6NHU
--

On 17 May 2013, at 10:35, Keith Maton <nentecular@...> wrote:

?
All,

Following on from my other emails yesterday, last night I restarted everything again only this time the U2 and GPS were switched off for an hour or so while I worked GB70DAM on 40m.

Once I started it up and the GPS locked, the clock once again was showing 00:00:00. I inverted the input and the time showed correctly.

Today, over 12 hours later, it's still correct to the second! Compare that to yesterday when it was rapidly losing time.

73 Keith, G6NHU

Re: QRSS ARDUINO shield questions

"dd5cf_colin"

#1173

Hi Hans here is the link:

it is about 1/4 of the page down.

73 Colin

Show quoted text

--- In QRPLabs@..., "dd5cf_colin" <jobaco@...> wrote:



--- In QRPLabs@..., Hans Summers <hans.summers@> wrote:

Hi Colin

If I run the ARDUINO UNO on battery power can I connect it to GND and Vin
(as recommend by the arduino website) through your QRSS shield?
All of the standard Arduino pins are fed through the shield in the standard
way. So if the website recommends that the Arduino can be powered by Gnd
and Vin through a shield, this would apply to the QRSS shield too. But to
be sure: can you provide a link to the part of the website that you are
referring to?

73 Hans

Re: QRSS ARDUINO shield questions

"dd5cf_colin"

#1172

--- In QRPLabs@..., Hans Summers <hans.summers@...> wrote:

Hi Colin

If I run the ARDUINO UNO on battery power can I connect it to GND and Vin
(as recommend by the arduino website) through your QRSS shield?
All of the standard Arduino pins are fed through the shield in the standard
way. So if the website recommends that the Arduino can be powered by Gnd
and Vin through a shield, this would apply to the QRSS shield too. But to
be sure: can you provide a link to the part of the website that you are
referring to?

73 Hans

Re: QRSS ARDUINO shield questions

Hans Summers

#1171

Hi Colin?

If I run the ARDUINO UNO on battery power can I connect it to GND and Vin (as recommend by the arduino website) through your QRSS shield?

All of the standard Arduino pins are fed through the shield in the standard way. So if the website recommends that the Arduino can be powered by Gnd and Vin through a shield, this would apply to the QRSS shield too. But to be sure: can you provide a link to the part of the website that you are referring to?

73 Hans

Re: GPS behaviour very inconsistent

Tony Volpe

#1170

Keith,

Could you say more about the battery backup you added? What is the exact voltage on your system? How is it different to what you had before? I have not been able to get my EM-406A to operate with the new kit, but it is working fine on the old one. In my case, the clock will not appear and the kit won't start when I set USE GPS to ON. If I set the invert GPS parameter to invert (which is wrong for the GPS, the clock appears, and the kit starts and will transmit on schedule, but the clock runs fast and within a minute or two is well out of sync with real time. This corrects momentarily when the transmit cycles end and then it runs away again.

If you have found a solution, I'd be well pleased. :))

The kit works well in every other way that I have tried, but I've only been using WSPR.

Tony

G0BZB

Show quoted text

On 20 May 2013 21:43, Keith Maton <nentecular@...> wrote:

?

Since I added battery backup to my GPS module at the weekend things are more consistent.?

When I apply power, the clock shows and it's normally accurate to within a few seconds. ?I put the GPS invert to off and the clock shows correct. ?I put the invert back to on and it stays correct without drifting. I've been running WSPR for over 24 hours on 30m/20m with no problems.

I'm very pleased to have been seen in VK land on 20m WSPR this afternoon.

73 Keith, G6NHU
--

On 17 May 2013, at 10:35, Keith Maton <nentecular@...> wrote:

?

All,

Following on from my other emails yesterday, last night I restarted everything again only this time the U2 and GPS were switched off for an hour or so while I worked GB70DAM on 40m.

Once I started it up and the GPS locked, the clock once again was showing 00:00:00. I inverted the input and the time showed correctly.

Today, over 12 hours later, it's still correct to the second! Compare that to yesterday when it was rapidly losing time.

73 Keith, G6NHU

Re: QRSS ARDUINO shield questions

"dd5cf_colin"

#1169

Hi Hans and Alan,

Thank you both for the information and the links Alan.

Have you any advice for me about question 1 of my last post:

 If I run the ARDUINO UNO on battery power can I connect it to GND and Vin (as recommend by the arduino website) through your QRSS shield?

My contribution to the  "BS170's in new kit PCB's - opinions please?"
post is why not supply a couple of 2N7000's in a seperate bag and those OM's who are not confident about which way round the BS 170's go can have the choice.

73 Colin DD5CF / G1ZOS

Show quoted text

--- In QRPLabs@..., Hans Summers <hans.summers@...> wrote:

Hi Colin

As Alan said, there's a book see  for the
details. People can still build and operate the QRSS Arduino shield without
the book. But the book does contain a lot of other interesting things and
would probably be useful for people who want to learn more. There's a huge
amount of information on Arduino around the internet too.

73 Hans
G0UPL

On Mon, May 20, 2013 at 4:27 PM, Alan <g0rwb@...> wrote:

**

Hans has contributed three chapters, including one on QRSS and one on the
multimode transmitter shield, to the new ARRL book 'Hamradio for Arduino
and Picaxe'. It's well worth a look, it would probably answer your
questions.

If I've read it correctly, switches 1 and 2 give a value from 0 to 3 to
select modes None/QRSS/FSKCW/DFCW, similarly switches 3 and 4 give speeds
of 12WPM/QRSS3/QRSS6/QRSS10.

Loading Arduino sketches into ATtiny chips is covered here:

I think you will need an ATtiny44 or ATtiny84. The 8-pin ATtiny45/85 types
don't have enough pins for this application.

Hope this helps.

Regards,
Alan G0RWB

--- In QRPLabs@..., "dd5cf_colin" <jobaco@> wrote:

Hi Hans and all,

I have a couple of questions about the arduino shield.

1: If I run the UNO battery power can I connect it to GND and Vin (asrecommend by the arduino website) through your QRSS shield?

2: I have looked through the sketch to find out which DIP switch doeswhat but due to my limited knowledge I cant make head or tail of it, can
you tell me the various switch positions / modes? at the moment I have only
switch 1 in the on position this seems to be QRSS 3.

3: I think it must be possible to upload the sketch to a ATtiny chip orsimilar (sorry lack of knowledge again) and breadboard the QRSS shield with
the chip, what sort of chip would I need ?

73 Colin DD5CF / G1ZOS

Re: Ultimate2 kit status summary-GPS

g3zjo

#1168

On 20/05/2013 22:27, Hans Summers wrote:
By 50%, you mean the duty cycle is 50%? If so, this would support my theory that this issue is related to very short pulse widths on some GPS modules.:-) . I don't know, I hoped you would.

PPS < ???25 ns @ 50% was copied from the manufactures data. Its very short, I can't see it on my scope all I can get is a trigger from its leading edge so I knew it was there.

73 Eddie

Re: Ultimate2 kit status summary-GPS

Hans Summers

#1167

Hi Eddie?

> My current theory is that the short pulse width from some GPS modules
> is interfering with, or being interfered by, the incoming serial data
> stream.
The Trimble is stated as PPS < ±25 ns @ 50% and werks beaufull.

By 50%, you mean the duty cycle is 50%? If so, this would support my theory that this issue is related to very short pulse widths on some GPS modules.

73 Hans G0UPL

Re: U2 step tests

g3zjo

#1166

On 20/05/2013 22:07, Hans Summers wrote:
Anyway I don't think we need to lose any more sleep over this stuff. I think I understand the problem adequately now.Hi Hans

Jolly good. Personally I think it shows what we have found with WSR, the results on each U2 are inconsistent, Andy FTD had prety good linearity and my steps are not linear on 3.5MHz. Some of the steps, (now back using your settings and 5.5Hz) give the same no or very tiny shifts on several pairs of steps.
All noted re bucket size but I do it see better the steps and the difference is consistent for each step and repeated accurately.
Anyway irrelevant now if you have the full understanding so looking forward to the sorted version.

73 Eddie

Re: U2 step tests

Hans Summers

#1165

Hi Eddie

?

I have increase the requested steps to 10 Hz total
There are 12 steps in the message
Only 8 discreet steps are present
The total pattern does not achieve the 10Hz expected
Each step will be 0.833Hz
The shift achieved is around 6Hz
8 steps times 0.833 equals 6.666Hz

How did you increase the requested steps to 10Hz total? The FSK (Hz) size parameter is ignored here. In the custom message mode, the size of each step is always 0.5Hz. So if you have 12 steps, it should go from 0 to 5.5Hz always.?

I believe that the observations of only 8 steps being apparent on 3.5MHz are just a feature of the settings you are using in your spectral analysis program. If you changed the settings or used a different program I think that you would see the 12 steps correctly. I think at the settings you have, the resolution of the spectral analysis is limited to a "bucket" size of more than 0.5Hz, which mean you can't observe all the 12 steps accurately.?

Anyway I don't think we need to lose any more sleep over this stuff. I think I understand the problem adequately now. Regardless of whether it is there on 3.5MHz or not, it clearly arises as you go up in frequency and at 10m the steps are much too inaccurate or non-existent. I don't need any more experimental observations now, I think the experiments to date have been extremely helpful.?

Many thanks to Eddie and all those of you who have provided the observations. Now I have to just change the part of the code which calculates the DDS tuning word.?

73 Hans G0UPL