Date   

Re: U3S15 balloon alive

James Zelazny jr
 

Guess it was 13:16 that time...no calibration...duh :)


Re: U3S15 balloon alive

James Zelazny jr
 

Set again for 15 seconds.
Maybe too weak for me yet.
13:20 will be next,maybe will get lucky and it will lock in again.
Not sure the maximum altitude on the Ublox NEO-7m`s.
Was only expecting 9600m on this flight.


Re: U3S15 balloon alive

Jeff KP3FT
 

Still at 15 seconds, got some good signals now. Checked the 30m waterfall periodically, just usual activity.

--------------------------------------------

On Sun, 7/23/17, James Zelazny jr <wtfbsyt@...> wrote:

Subject: Re: [QRPLabs] U3S15 balloon alive
To: QRPLabs@groups.io
Date: Sunday, July 23, 2017, 9:04 AM

No decode,may be 20
seconds ahead now ?


Re: U3S15 balloon alive

James Zelazny jr
 

No decode,may be 20 seconds ahead now ?


Re: U3S15 balloon alive

James Zelazny jr
 

I see it now,1400hz...going lower each cycle.
This is going to be a tough flight.


Re: U3S15 balloon alive

Jeff KP3FT
 

At the 1406 hz mark on this round (20m WSPR).  I'll drop the frequency a bit after this last decode. 


Re: U3S15 balloon alive

James Zelazny jr
 

Looks like you got it Vern as did I.
Great stuff !!
The flight has taken altitudes I did not expect.Maybe the Ublox NEO-7m does not like the altitude.
Hope it locks in eventually.


Re: U3S15 balloon alive

James Zelazny jr
 

Jeff just told me he is setup for 15 seconds ahead.
I see the 20m signal here,but can not seem to get decodes.
Hope you have better luck than me.Should see the next @ 12:34,then 12:48,13:02 then takes an extra calibration and back @ 13:20.
All 20m time slots.
Not sure how 30m is today.


Re: U3S15 balloon alive

Vernon Matheson
 

Sri missed the +10 seconds in email…not awake yet here LOL!!

 

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Vernon Matheson
Sent: Sunday, July 23, 2017 12:12 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] U3S15 balloon alive

 

How much ahead Jim

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of James Zelazny jr
Sent: Sunday, July 23, 2017 12:09 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] U3S15 balloon alive

 

KP3FT is hearing U3S15 10 seconds early this morning.He has set his PC clock ahead.
Looks like GPS is not functioning yet.
Good catch Jeff !!


Re: U3S15 balloon alive

Vernon Matheson
 

How much ahead Jim

 

From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of James Zelazny jr
Sent: Sunday, July 23, 2017 12:09 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] U3S15 balloon alive

 

KP3FT is hearing U3S15 10 seconds early this morning.He has set his PC clock ahead.
Looks like GPS is not functioning yet.
Good catch Jeff !!


Re: U3S15 balloon alive

James Zelazny jr
 

KP3FT is hearing U3S15 10 seconds early this morning.He has set his PC clock ahead.
Looks like GPS is not functioning yet.
Good catch Jeff !!


Re: S3 seems to work, but no spots

SM7ETW Jan
 

What part of the world are you located in Hazarda?


Re: S3 seems to work, but no spots

Hazarda Masklo
 

On Sun, Jul 23, 2017 at 12:51 am, Alan wrote:
Do you receive anything in any mode on any band?
Sure, when propagation's good.  Even with an awful antenna, I've received and decoded JT65 signals from over 5000 miles away...Siberia, Australia, Indonesia, Argentina, Bolivia, Japan, Korea, etc., etc.  The problem is that propagation is just horrible here now.  I saw a propagation map a couple of weeks ago and it showed a big "hole" all over my part of the state.  Sending with the U3S or receiving with my receiver are both just equally sad, and they are 100% separate systems.  The only JT65 signals I'm receiving over 40m in JTDX, at least most of the time, are from the mysterious KG5MHU, which is the sole callsign from which I'll see signals for hours and hours, if not whole days in some bands.

As far as the WSPR frequencies being off (at least as far as transmitting), I don't see how this is possible with the GPS-calibrated time and frequencies on the U3S.

Anyway, just for reference, this is what PSKReporter spots I got from the U3S #1 tonight on 40m/JT65.  Certainly not much, but better than the 20m vacuum or my experience with 40m WSPR on WSPRNet :



Re: S3 seems to work, but no spots

Alan
 

Bad propagation
+ lame antenna. If you can't see nor hear WSPR signals with the reception software, it's probably because they just aren't there, and that works in both directions.

Do you receive anything in any mode on any band?
I wonder if your antenna is just picking up local electronic noise.
The usual problems with WSPR are timing and exact frequency setting. Do not believe you rig's display.
People are nearly always amazed by what the most makeshift antenna produces with WSPR.
It will most times be significantly better than other modes, brief HF openings are not typical.
20m? OK, I'm in a good location, 1000 spots in the last 9 hours is typical. Including some 200mW Americans.
60m as another example, 1000 spots from my 1W in 7 hours.
Too much activity now, it's difficult to keep up with what is happening.

73 Alan G4ZFQ


Logically, JT65 is going to be productive of more spots than WSPR in lousy conditions because they're much shorter signals. If conditions for successful reception are only there for a matter of a few seconds --
and they typically are with weak propagation and other various limitations -- the longer the signal the less likely it is to be completed.
I couldn't get WSPR signals nor were mine ever spotted when I first started, so I assumed I didn't understand what I was doing and just gave up with WSPR when I started having JT65 work out reasonably well, given the rotten conditions under which I was working.
Last night, I went back and set up WSPR on the U3S #2 on 40m before grayline and just let it go. After ~12 hours, I had bagged only one burst of spots over an eight-minute period on the west coast, seven receptors within ~400 miles, and then it went back to being typically black. So, there's nothing wrong with my WSPR setup. *The conditions necessary for its successful use just aren't there*.
Those constitute the *only* spots I've ever gotten with WSPR.
I get hugely better (though certainly not fantastic) results with JT65. So, why even bother with WSPR? When I get a righteous antenna designed and up once this infernal summer is over, maybe I'll try WSPR again.
[Re the magic seconds hypothesis above, 20m has been as dead as Julius Caesar here for some time,


Re: PA stands for Purple Amp.

Facility 406 <facility_406@...>
 

"You've convinced me. That'll be a much cleaner setup, with everything
mounted on the lid. It'll have no messy wires at all. I have a couple Pi
projects where there are wires between the lid and box"

I was playing with some parts and a board, the transistor, on the bottom
does NOT flip 180º, pin-wise. Don't know what I was thinking. Look at your
amp from the side, then just rotate the transistor around clockwise to the
side until underneath, for example, same pin alignment, just on the bottom
now, through the lid, and on the outside. You'll have to get your soldering
iron between the lid and board, so longer stand-offs would be better, maybe
use a light and magnifying specs, have the solder-side up and the lid on top
to help with wetting and flow, or use/make a socket, the transistor
hard-mounted to the lid, the board slid down onto the transistor. In the
past, for various things, I've pulled pins from a socket, such as a data
connector, Canon plug receptacle, what have you, and put the female portion,
of the correct size in place of a component, so I can swap parts in and out
for testing. These are a lot longer than just a board mounted socket, some
almost an inch in length, plenty to get outside of the lid.

Kurt


Re: Rapid Power Drop Off

John AE5X <ae5x@...>
 

Have you tried compressing or expanding the winding on the 20m filters toroids? That often has an effect on the power out.

John AE5X
https://ae5x.blogspot.com


Re: Rapid Power Drop Off

SM7ETW Jan
 

If you bypass the LPF with jumpers, what happens?


Re: Rapid Power Drop Off

Curt wb8yyy
 

I redid the bifilar much neater -- but no change in 20m output power.  has me wondering about the LPF !  I never did build the scalar analyzer I was considering.  of course that would imply issues on 2 bandpass filters. 


Re: S3 seems to work, but no spots

Long Wave
 

I'm sure it boils down to what I thought since Day One:  Bad propagation + lame antenna.  If you can't see nor hear WSPR signals with the reception software, it's probably because they just aren't there, and that works in both directions.

Logically, JT65 is going to be productive of more spots than WSPR in lousy conditions because they're much shorter signals.  If conditions for successful reception are only there for a matter of a few seconds -- and they typically are with weak propagation and other various limitations -- the longer the signal the less likely it is to be completed.

I couldn't get WSPR signals nor were mine ever spotted when I first started, so I assumed I didn't understand what I was doing and just gave up with WSPR when I started having JT65 work out reasonably well, given the rotten conditions under which I was working.

Last night, I went back and set up WSPR on the U3S #2 on 40m before grayline and just let it go.  After ~12 hours, I had bagged only one burst of spots over an eight-minute period on the west coast, seven receptors within ~400 miles, and then it went back to being typically black.  So, there's nothing wrong with my WSPR setup.  The conditions necessary for its successful use just aren't there.

Those constitute the only spots I've ever gotten with WSPR.

I get hugely better (though certainly not fantastic) results with JT65.  So, why even bother with WSPR?  When I get a righteous antenna designed and up once this infernal summer is over, maybe I'll try WSPR again.

[Re the magic seconds hypothesis above, 20m has been as dead as Julius Caesar here for some time, but I ran one of the U3Ss on 20m with JT65 on 2-minute transmit cycle for ~14 hours the other day and got one (1) spot...2222 miles away in Kentucky.  That was it.  I did the same thing yesterday and after ~16 hours, I once more only had a single reception by a station 2100 miles away in West Virginia.  Nothing else!]


Re: Diference between gps clocks

colin.douglas@...
 

 I swopped the skm and the qlg1 into the u3s and both read exact time compared to online time.So there appears to be an issue when they are used to set clock on vfo kit.Doesnt really matter as clock is not used in timing wspr but curious. 73s G8LDJ