Date   

Re: Will ub4 tx on serial connection

Hans Summers
 

Hi Richard 

Are you sure you have everything set up correctly on the receiver? Are you receiving other WSPR signals? 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: Richard Fairman <acampb5160@...>
Date: Sat, May 14, 2022, 11:17 PM
To: QRPLabs@groups.io
Subject: Re: [QRPLabs] Will ub4 tx on serial connection
Here is image of u4 signal on my receiver screen


Re: QDX on 630M

Cox
 

Looking at Hans' 2017 (!) discussions and the 5351 info, Hans' fancy quadrature with a 90-degree phase shift doesn't seem in the works below 3.2 MHz.
I'm wondering if a little 74AC74 quad board driven by that third output might be a simple solution.  That would only require coding in that extra oscillator for the times 4 +/_  the IF offset.  Or I'll just hang one of his osc's externally.  On 630M and the band below, I don't see ever changing the RX freq much, if at all.
Hans, I'll do the Buy Me a Coffee bit at Hamvention.  On my two trips to Turkey, I was always offered a bit of tea or Raki.  But I want you clear-headed!
N0UU


Re: 160 propagation shift with full moon

Al Sines
 

George,

Very interesting! Thanks for sharing. 

73, Alan, W3AL 


On May 14, 2022, at 08:36, George Korper <georgekorper@...> wrote:

See attachment


Re: Will ub4 tx on serial connection

Richard Fairman
 

Here is image of u4 signal on my receiver screen


New to the QRP Labs and thee group

Glenn Maclean
 

Hello,
I have been off the air for several years. I use to be very active with QRP CW radios many years ago. I just ordered a QCX +5 kit with the TXO, AGC, and GPS for 40 meters. I also ordered the mini QCX for 20 meters. I am waiting for the kits and looking forward to putting them together. I do not have any HF radios any longer and wanted to get something small and portable for operating in a park on a lazy day.

I was wondering if anyone is using the HFp portable antenna made by the Ventenna company? I have one of these antennas and was wondering how well they work and if anyone is using one? I also would be interested in comments about what portable antennas you guys are using with the QCX radios?

Thank you,
Glenn WA7SPY


Re: 160 propagation shift with full moon

Albert Tatlock's Greatest Hits - Vol 1
 

On Sat, May 14, 2022 at 07:39 PM, M0PWX wrote:
Signals reflecting off the “iron chicken” 😊
That's the one ;-)


Re: Enhanced QDX for 2 Meters .. Crazy? #qdx

William Smith
 

You can build a 440 MHz repeater for under $500, so maybe put that on top of the hill? Yeah, solar power might add a bit more if there’s no grid available, but think of the learning experience!

73, Willie N1JBJ


On May 14, 2022, at 3:18 PM, tom@... wrote:

Thanks again for all the really interesting replies!

  • Martin, the balloon video was impressive! As someone once said, "Space is Hard". I've seen videos of balloons being ripped apart by turbulence at 100k feet. The DRA818V looks interesting and would be fun to play with but for my current application might not be ideal. Since it's FM (2.5 Khz bandwidth) I don't gain much using JS8Call, and I think I need the 20 db to get over the hill. APRS is completely new to me and looks like a whole new world that I haven't explored but would like to. From my quick look there's no forward error correction, this might yield some extra db's to the signal compared to voice.

  • Joshua, thanks for the offer on the Ukranian transverter. A small problem is that I need two of them. I'll send you an email.

  • pap2pin, Wow, 200 pages on NVIS!. This is the document I've always wanted! The Rx/Tx antenna difference might start to explain the lack of reciprocity ... I'll read ....

So,

  • HF NVIS .. Big antenna, free (already made antenna), limited communication window (MUF) Will read the 'book' and experiment.

  • Enhanced QDX .. Hans put the damper on that .. I'm still not completely giving up .... I found a 500Mhz GBP opamp for $4 .. board layout would be fun. This was the ideal solution .. Small antenna / rig. JS8Call to do the heavy lifting.

  • DRA818V .. Small, small antenna, cheap, fun, wide bandwidth negates JS8Call advantage to get over the hill.

  • Transverter .. Small antenna, more complicated, easy to implement, and some money.

  • Yagi .. Either help the transverter or APRS .. need time to build.

Again, thanks for all the great ideas! I never expected this many replies!

I apologize that I have given a somewhat fuzzy problem statement, but I'm learning a lot ...

Tom WA6WWRA



Re: Will ub4 tx on serial connection

Richard Fairman
 

here is screenshot Im getting a whine on my recever on 20m 14,095 mhz  during the tx period as indicated by the debug screen but no wspr showing on wsjtx or on wspr net

r



 


Re: Enhanced QDX for 2 Meters .. Crazy? #qdx

Tom P
 

Thanks again for all the really interesting replies!

  • Martin, the balloon video was impressive! As someone once said, "Space is Hard". I've seen videos of balloons being ripped apart by turbulence at 100k feet. The DRA818V looks interesting and would be fun to play with but for my current application might not be ideal. Since it's FM (2.5 Khz bandwidth) I don't gain much using JS8Call, and I think I need the 20 db to get over the hill. APRS is completely new to me and looks like a whole new world that I haven't explored but would like to. From my quick look there's no forward error correction, this might yield some extra db's to the signal compared to voice.

  • Joshua, thanks for the offer on the Ukranian transverter. A small problem is that I need two of them. I'll send you an email.

  • pap2pin, Wow, 200 pages on NVIS!. This is the document I've always wanted! The Rx/Tx antenna difference might start to explain the lack of reciprocity ... I'll read ....

So,

  • HF NVIS .. Big antenna, free (already made antenna), limited communication window (MUF) Will read the 'book' and experiment.

  • Enhanced QDX .. Hans put the damper on that .. I'm still not completely giving up .... I found a 500Mhz GBP opamp for $4 .. board layout would be fun. This was the ideal solution .. Small antenna / rig. JS8Call to do the heavy lifting.

  • DRA818V .. Small, small antenna, cheap, fun, wide bandwidth negates JS8Call advantage to get over the hill.

  • Transverter .. Small antenna, more complicated, easy to implement, and some money.

  • Yagi .. Either help the transverter or APRS .. need time to build.

Again, thanks for all the great ideas! I never expected this many replies!

I apologize that I have given a somewhat fuzzy problem statement, but I'm learning a lot ...

Tom WA6WWRA


Re: QDX with Elecraft T1

James Daldry W4JED
 

OK, Wolfgang

Just let me go back in my corner and sulk.... and pout..... and sniff (wipes away itty bitty tear).

73

Jim W4JED

On 5/14/22 10:06, Wolfgang OE1MWW wrote:
On Sat, May 14, 2022 at 06:53 AM, James Daldry W4JED wrote:
The other way is to use a quarter wave piece of paired open wire - the original zepp configuration,
Alan, there a zillion of possible antenna construction to be used - question was not 'what antenna', it
was "QDX with Elecraft T1". I wanted to show by an example that it is not a good idea to hook up the
T1 right behind the QDX. Think we should stay at the topic of the post.

73's de OE1MWW
Wolfgang


Re: 160 propagation shift with full moon

M0PWX
 

Signals reflecting off the “iron chicken” 😊

 

Peter

M0PWX

 

M0PWX Grabber Page (qsl.net)

 

 

I blame the Clangers.

https://www.youtube.com/watch?v=Ok6CoIwcJ-E

_._,_._,_

 


Re: QDX with Elecraft T1

N5VMO Pat
 

On 5/14/22, Dave VE3GSO <VE3GSO@...> wrote:
Worked well in 1960, should work well today, unless electrons have become
fussy of late.

Dave



I wonder what a "Zip - Cord" 20 meter dipole with a 1/4 wave zip cord
feeder looks like attached to a T-1 on a QCX on 20m CW /-)
--

*73's Pat N5VMO*


Re: QDX with Elecraft T1

Wolfgang OE1MWW
 

Roelof,

sorry, once again - all your answer are either wrong or having no relation to the topic: "QDX with Elecraft T1".
So, why do you elaborate about matching a 3/8 for 20m in this thread and sending the same posts all the time
via email to me?

Someone who wants to follow in this thread with the topic "QDX with Elecraft T1"  will have a hard time.

73's de OE1MWW
Wolfgang
P.S. and your preferred example shows double the loss than the second one, using the 5,493uH. ;-)
Series L has calculated -0,12db and the series C calculation shows -0,07db. OK, both are marginal.


Re: QDX with Elecraft T1

Dave VE3GSO
 

Worked well in 1960, should work well today, unless electrons have become fussy of late.

Dave

On May 14, 2022, at 13:55, N5VMO Pat <n5vmo00@...> wrote:

I wonder what a "Zip - Cord" 20 meter dipole with a 1/4 wave zip cord
feeder looks like attached to a T-1 on a QCX on 20m CW /-)

On 5/14/22, Paul Ross <W3FIS@...> wrote:
Don't know for sure, but a MUCH better bet for low power systems are the "T"
or "Z match" tuners with a built in resistive SWR bridge which provides a
"safe" load during tune up. I use either the QRP Kits "Z" match tuner, or
the 4 State QRP "T" tuner to good advantage. Not "automatic," but really
easy to learn how to use. If you are going to do "band hopping" with one on
the SAME antenna, then simply make a "cheat" card or label with the
approximate settings for each band of interest, especially for the "T"
tuner, as you have three adjustments. With the SWR bridge "out," tune for
maximum noise -- gets you in the right ballpark, then set bridge "in," and
dip the LED, then switch it out. Takes longer to talk about it than to do
it.






--

*73's Pat N5VMO*





Re: QDX with Elecraft T1

N5VMO Pat
 

I wonder what a "Zip - Cord" 20 meter dipole with a 1/4 wave zip cord
feeder looks like attached to a T-1 on a QCX on 20m CW /-)

On 5/14/22, Paul Ross <W3FIS@...> wrote:
Don't know for sure, but a MUCH better bet for low power systems are the "T"
or "Z match" tuners with a built in resistive SWR bridge which provides a
"safe" load during tune up. I use either the QRP Kits "Z" match tuner, or
the 4 State QRP "T" tuner to good advantage. Not "automatic," but really
easy to learn how to use. If you are going to do "band hopping" with one on
the SAME antenna, then simply make a "cheat" card or label with the
approximate settings for each band of interest, especially for the "T"
tuner, as you have three adjustments. With the SWR bridge "out," tune for
maximum noise -- gets you in the right ballpark, then set bridge "in," and
dip the LED, then switch it out. Takes longer to talk about it than to do
it.





--

*73's Pat N5VMO*


Re: 160 propagation shift with full moon

Roelof Bakker
 

George,

Thanks for the article on Moon Phase and propagation
I have not seen it before.

There is also an enhancement at the onset of a geomagnetic storm.
Before the Kyoto Dst value drops, indicating a geomagnetic storm, it shows a fast rise and
during this time propagation is enhanced.

73,
Roelof, pa0rdt


Re: 160 propagation shift with full moon

Roelof Bakker
 

Hello George,

60 years ago, I was active as SWL chasing DX on 80m.
At full moon, propagation was always better.

The last 20 years I have been chasing NDB's on long wave and believe it or not, the same
phenomenon was found over and over again.

If I remember correct this has been discussed in QST long ago with no clear outcome.

73,
Roelof, pa0rdt


Re: QDX with Elecraft T1

Roelof Bakker
 

Hello Wolfgang,

It was not clear that your example featured a 3/8 wavelength ground plane.
This makes it even more interesting.

Instead of the T-match tuner, a simple L-network at the base of the antenna performs a miracle.


The first configuration is to be preferred as it uses a smaller coil and hence has less loss.
E.g 16 turns 0.8 mm enammelled wire on a T-106-6 toroid will be fine.

The L-tuner presents 50 ohm to the coax feed-line.
The now matched 3.5 meter feed-line suffers a massive loss of 0.066 dB, instead of the previous 1.6 dB.

Assuming that the loss in the L-network tuner is similar to the loss of the T-match, we now have a grand total loss of 0.766 dB, which is a major improvement.

Discussing a QCX / QDX followed by the Elecraft T-1 automatic tuner, these examples show that the T-1 should be placed at the feed-point of the antenna.

For single band use, constructing a L-network tuner is quite easy. I use a similar arrangement on 40 m, matching an 8 meter long inverted-L, fed with 25 meter RG58 from my 40m QCX+ running 1W WSPR. Good enough for world wide coverage.

The bottom line: if you have to use an antenna tuner, its location can make a difference.

73,
Roelof, pa0rdt
--
Roelof Bakker, pa0rdt


Re: Will ub4 tx on serial connection

Hans Summers
 

Hi Richard 

Yes it transmits on serial. 

I'd suggest running it in debug in the editor, and then you can see what's going on. And take a screenshot during when it looks like it's transmitting and send it. 

73 Hans G0UPL
http://qrp-labs.com
https://www.buymeacoffee.com/g0upl


-------- Original message --------
From: Richard Fairman <acampb5160@...>
Date: Sat, May 14, 2022, 7:30 PM
To: QRPLabs@groups.io
Subject: [QRPLabs] Will ub4 tx on serial connection
Will the ub 4 wspr tracker tx on serial connection 


I have the tracker on serial connection. Gps fix is confirmed when I run program but cannot detect any wspr tele tx. I'm attached  to a dipole of 5m per element


Re: 160 propagation shift with full moon

George Korper
 

Funny, but there is no blame.
It's a good thing!

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