Date   
Re: RSGB 'the morse code for radio amateurs' pamphlet; 1957

KB3USG
 

On 2019-08-25 16:11-0400, Shirley Dulcey KE1L wrote:
[...]
Things have changed since 1957. Morse code is nearly dead in the realm
of commercial radio. It is no longer used for maritime radio and the
monitoring stations shut down years ago. [...]
I just wanted to point out that KPH (West Coast) is still manned on
Saturdays for a few hours (http://www.radiomarine.org) on the maritime
frequencies, and K6KPH is on amateur frequencies.

I've not visited (yet), but I'm making plans:

https://www.nps.gov/pore/learn/historyculture/people_communications.htm
https://www.nps.gov/pore/planyourvisit/events_nightofnights.htm

Cheers,
Paul

Re: QCX DX !

Peter GM0EUL
 

Wow well done.  Is that a new record perhaps?

Hope to catch you tomorrow in the QCX Challenge.

73
Peter, GM0EUL

Re: RSGB 'the morse code for radio amateurs' pamphlet; 1957

Shirley Dulcey KE1L
 

That article only says that some people were saying that it was dead,
and points to examples, especially maritime use, that showed that it
was anything but.

Things have changed since 1957. Morse code is nearly dead in the realm
of commercial radio. It is no longer used for maritime radio and the
monitoring stations shut down years ago. Nor is it used for radio
navigation, as it was in the days of LF broadcasting for that purpose.
The only significant remaining use is repeater identification, where
it is used because a Morse identifier in the background is less
distracting than a voice ID would be.

But ham radio is another story because our goals are different.
Commercial radio is about the exploitation of things that can be done
repeatedly and reliably. (That's one reason that shortwave
broadcasting has never been much of a commercial success; mostly it's
been done by governments and religious groups.) Mostly they want
things to work at least 99% of the time, and even higher percentages
are better. But much of ham radio is about exploration of the
possible; finding where the boundaries are, and what can be done under
difficult conditions or with limited resources. A signal path that
only works 1% or 5% of the time is of no interest to a commercial
broadcaster, but hams spend many hours searching for those
opportunities.

The challenge of exploring the possible is at the heart of QRP. We
choose to limit ourselves to low power, and often to field operations
and limited antennas, to see what can be done with a very modest
station. When that gets too easy, some operators go even farther and
reduce power to QRPp levels (milliwatts). We hold contests like the
Spartan Sprint where the weight of the station is a factor in the
scoring system. We use Morse because it is the most power-efficient
mode that can be heard with human ears, and because it can be handled
with very simple equipment. And we invent modes like WSPR that can
communicate with signals even weaker than we can hear.

On Sun, Aug 25, 2019 at 3:26 PM SkipF, NT1G <@SkipF> wrote:

Margaret was even suggesting that morse code was obsolete 62 years ago...

https://archive.org/download/TheMorseCodeForRadioAmateurs/RSGBMorseCodeSmall.pdf

The link is 4mb; remove 'Small' from url above for 24mb download.

73 de NT1G
Nantasket Beach

RSGB 'the morse code for radio amateurs' pamphlet; 1957

SkipF, NT1G <skip.flem@...>
 

Margaret was even suggesting that morse code was obsolete 62 years ago...


The link is 4mb; remove 'Small' from url above for 24mb download.

73 de NT1G
Nantasket Beach

Re: U3S Gps issue #gps #u3s

Alan G4ZFQ
 

(Mine is an original U3 (9850)
It goes straight into TX and doesn't obey the WSPR 2 minute rule,
Alan,

I thought I vaguely remembered that.
I upgraded mine some time ago, but I can not see a reference to the change in the firmware updates.

73 Alan G4ZFQ

QCX DX !

Luc ON7DQ
 

Last friday, I took my 20m QCX to the local radio club meeting.
The club is in a new building, and we have no antennas there yet, but I wanted to give a short demo.
So I took a 10m endfed wire + "Fuchs" tuner (you can see it here on the QCX website : https://www.qrp-labs.com/news2018/newsjul2018.html )
 plus a 6m fishing pole and put the wire in an inverted L out of the window (on the first floor of that building).
Abt 1m wire was indoors, 5m horizontal outdoors, and the rest was dangling down from the tip of the pole.
After some CQ on 14060 and no replies, I started tuning the band and found ZW5ARCCO with a pile-up on  14024.85
I had to look it up ... it was a club station from BRASIL !
With some patience and making several calls, I finally got a ON ? , then ON7 ? and in the end heard I my call coming back correctly and a 599 report ...
Not a long qso, and the 599 was obviously not the real S-meter reading, but it was a QSO.
Time of the QSO was 19:42 UTC.
Amazing little rig ... 8600 km with only 5W !

I'll be using the rig in the QCX Challenge tomorrow, who knows I can work some more DX ?
But if you live in Europe, feel free to call me as well, hi.

73 Luc, ON7DQ

Re: #40m #TVI #DTV #U3S #WSPR Freeview Interference #40m #tvi #dtv #u3s #wspr

geoff M0ORE
 

A braid breaker is perhaps the wrong name for it. It is a device for restricting the current flow on the outer braid in much the same way as a choke balun.

As said in previous post, there is no perfect answer to curing TVI. Each case is different.

On 25/08/2019 12:11, Andy Brilleaux via Groups.Io wrote:
On Sat, Aug 24, 2019 at 11:43 PM, Nik wrote:
I concluded that not all BB's are equal.
You beat me to it Nik.
If search the web then I see lots of people using ferrite rings as "braid breakers".
To me, a braid breaker is the one with the coupled coaxial loops.
For some reason, I don't see this referred to so I can't point to anywhere useful.
But I guess the usual radio handbooks and manuals would have a chapter on them.

73 de Andy

Re: QCX 3 Trimmers can't find minimums

Don DeGregori
 

Funny, I built a Heathkit GR-25 color TV with absolutely no mistakes at all! Then the color bands on the resistors were easy to see and mostly were 1/2 watt.

So what is the best light, a tensor?

Don

Re: U3S Gps issue #gps #u3s

Alan de G1FXB
 

Hi Alan,

thanks' my post was just to make sure the Original Poster was waiting sufficient time for a complete TX cycle, like I have to.....
Seems like later firmware does a NMEA parse for time on power up.


(Mine is an original U3 (9850)
It goes straight into TX and doesn't obey the WSPR 2 minute rule, (It doesn't read the NMEA string until it has completed a cycle so cannot know UTC until then....))


Alan


On 25/08/2019 15:24, Alan G4ZFQ wrote:
>the same way as the earlier revisions?

Alan,

I do not know, just that mine shows time etc immediately the GPS locks.

73 Alan G4ZFQ

--
Light travels faster than sound this is why some people appear bright until you hear them

Re: QCX 3 Trimmers can't find minimums

James Daldry W4JED
 

Hi, Don

Yep, it looks like dull drudgery in your future. Get out the Dukane 3 inch f2.5 projection lens and print off a copy of the parts list. Then stare at the parts through the lens, and tick tick tick the parts list. Using either daylight or a hot (halogen) filament light source helps with identifying color code colors. I find that violet (7) and brown (1) look identical under ordinary room lighting - and that includes LED and fluorescent lamps. Violet IS NOT red plus blue. The fact that you can lie to your eyeballs using red and blue does not make it so. Your red retina cones have a second response peak in the violet region, so if the eye sees red + blue, the brain thinks violet. When I built my Conar color tv kit back in 1968, I bought a Tensor lamp at a flea market in order to be able to tell the filament wiring from the rest. Put the lamp on high and the blues and violets would just pop out.

By the way, when I got the kit completed I got no high voltage and the horizontal output tube was overheating. Turned out I had swapped the horizontal discharge capacitor from the oscillator plate to ground (.0033 mf) with the coupling capacitor from the oscillator plate to the output tube grid (.033 mf). I could hear some 15750 Hz "singing" from the yoke and flyback, just not enough to properly drive the output stage. I could also hear the tink tink tink of the output tube turning red. Not good. I was so sure of my kit building magnificence I even pulled the core out of the flyback to see if it was cracked. I tracked it down by the fact that the grid voltage was only about -10. It should have been -40 to -70, depending on screen brightness. The high voltage was regulated by varying the bias on the horizontal output tube grid.

Jim

On 8/24/19 4:49 PM, Don DeGregori wrote:
James,

Finally getting somewhere. Did what you said using dual channel scope. Neither trimmer has any effect in moving trace on top of other channel. One trace always about 30 degrees to side of other trace. Looks like I need to look for wrong part in this area of circuit.

more later ...
Don

Re: U3S Gps issue #gps #u3s

Alan G4ZFQ
 

>the same way as the earlier revisions?

Alan,

I do not know, just that mine shows time etc immediately the GPS locks.

73 Alan G4ZFQ

Re: U3S Gps issue #gps #u3s

Alan de G1FXB
 

I believe the current firmware operates the same way as the earlier revisions?
Time & Locator fields are populated from the GPS at the end of the transmission sequence,
therefore it normal for the U3S have to be either manually edited,? or run unsynchronised for the first cycle, when upon it reads the NMEA string......


Alan


On 25/08/2019 14:31, Alan G4ZFQ wrote:
I have issues with Gps in my U3S.
I am using bn180 gps with ttl levels. The pps works and i am transmitting wspr just fine. However i have to set the clock manually after every power loss. It just wont set the time by the gps. I have tried another ttl gps and it is the same. I have tested the bn180 with serial to usb adapter on my pc and it works just fine. The baudrate is correct and it transmits NMEA messages.

Kiril,

The NMEA sentences may not be compatible with the U3.
You may make it work by setting the Menu "GPS Check" to off.
It will probably then work.
But note, when the U3 gets confused by the extra NMEA sentences you may report the wrong locator or see some other anomaly.

The best way is to find out if the sentence (usually GLL) can be disabled permanently in the GPS. Or, get a QLG1..

73 Alan G4ZFQ




--
Light travels faster than sound this is why some people appear bright until you hear them

Re: Plugged QCX power in backwards. Smoke. Reflashed new chip. Still no change. What's next? #smoke #qcx

Alan de G1FXB
 

I would be inclined to find out why it is unable to maintain the regulated 5v output?

It could be a straight forward failure of the regulator,
Alternatively it may be heavily loaded by one or more defective devices that it feeds,
(presumably it immediately becomes excessively hot?)

Easiest is to cut & separate the output leg where it can be bridged again if it proves to be OK, and see if 5v returns from the regulator remembering it is now completely un-loaded.


Also worthy of attention, are the areas of the circuit that is powered by the "raw" 12v input voltage that was reversed.....
What is the current drawn by the unit in RX at the moment? (nominal 120-150mA)

Alan

On 25/08/2019 02:16, Alex Van Patten wrote:
On the voltage regulator, pins 1 and 2 show 12.77v which is identical to the battery input.?

Pins 2 and 3 is only 3.03v ...could that be bad?

--
Light travels faster than sound this is why some people appear bright until you hear them

Re: U3S Gps issue #gps #u3s

Alan G4ZFQ
 

The best way is to find out if the sentence (usually GLL) can be disabled permanently in the GPS.
It seems there is no memory in the BN180 so configuration can not be saved.

73 Alan G4ZFQ

Re: U3S Gps issue #gps #u3s

Alan G4ZFQ
 

I have issues with Gps in my U3S.
I am using bn180 gps with ttl levels. The pps works and i am transmitting wspr just fine. However i have to set the clock manually after every power loss. It just wont set the time by the gps. I have tried another ttl gps and it is the same. I have tested the bn180 with serial to usb adapter on my pc and it works just fine. The baudrate is correct and it transmits NMEA messages.
Kiril,

The NMEA sentences may not be compatible with the U3.
You may make it work by setting the Menu "GPS Check" to off.
It will probably then work.
But note, when the U3 gets confused by the extra NMEA sentences you may report the wrong locator or see some other anomaly.

The best way is to find out if the sentence (usually GLL) can be disabled permanently in the GPS. Or, get a QLG1..

73 Alan G4ZFQ

Re: 5 watt / 10 watt pa

Bill Cromwell
 

Hi,

Observing that the list is about QRP Labs gear and QRP I assume the 5 and 10 watt amps are the ones listed on the QRP Labs shop page. In my replies I pointed at other gear but also came back around to the QSX I intend to buy. I already have the 10 watt amp kit (and a couple of other QPR Labs kits). For hams who do not already have suitable battery power lithium technology referenced by Allison and others is the most appropriate choice. In my own case I already have the investment in the sealed, lead-acid batteries (aka SLAB) and at my age those may still be in service after my final QSO. There is not much point investing even more treasure when I already have the bases covered. Others may be in a similar position. If I have to replace the SLABS (can't read the expiration date stamped on my heel) I will most ceratinly go with the Lithium batteries.

As for running the 5 or 10 watt amps (no matter who made them) from a 9 volts battery - you cannot get a bushel of apples from a little brown lunch bag! It's a no-go right at the start. I think that point was made very well.

73,

Bill KU8H

On 8/24/19 10:35 PM, ajparent1/KB1GMX wrote:
Ok 9V batteries...
They are rated 9V 300mAh and max current under 100ma so total power in a
battery is rather small.  Thats 2.7wh!  puny.  To equal a 12V 7Ah gell cell you
need a lot as the gell cell checks in at 84wh.  So you would need about 31
of those 9V batteries to do what one 12V 7AH gell cell can.
The 10W amp wants at 10W out at 13V about 1.8A (slightly less, but round numbers)
so that's about 23watts from the battery.  It runs very poorly at 9V so that a non starter.
Same case for a 5W amp.  There are just not enough amps or watts in the cells.
Easier and better to consider 8 C Cells or better D cells.
Running a simple tube transceiver is a yes as 10 in series (27WH) is 90V and
the tube will pull about 1 Watt or about 11mA which is what those 9V battery
was designed for give or take.  15 of them in series is just right for the
Mounteneer (QST 1950) at about 2W out and would run for about 50-100
hours on the "B" battery and using C cells about the same for the filaments.
 FYI I have a RCA battery portable broadcast receiver and that what I use a
few C cells and 10 9V cells for lots of hours of run time.
I agree that the lithium tech is a good fit for portable radios.  Been using
them since the 90s and they have improved and if not abused or
improperly charged they have proven lighter nd generally better power.
THe yabut is standard LIPO is 4.2V full charge and 3.7 average discharge.
Where A123 or LIFePO is 3.7V full charge and 3.2 V for average discharge
value.   Radios designed for nominal 12V (actually 13.8) the LIFePo tech
is a good match as 4 in series is about 14.8V full charge an where 4 LiPo
would be 16.8V full charge and may break things.
Allison
--
bark less - wag more

U3S Gps issue #gps #u3s

Kiril Miloshev
 

Hi there. I have issues with Gps in my U3S. 
I am using bn180 gps with ttl levels. The pps works and i am transmitting wspr just fine. However i have to set the clock manually after every power loss. It just wont set the time by the gps. I have tried another ttl gps and it is the same. I have tested the bn180 with serial to usb adapter on my pc and it works just fine. The baudrate is correct and it transmits NMEA messages. 
Any idea?

Re: Plugged QCX power in backwards. Smoke. Reflashed new chip. Still no change. What's next? #smoke #qcx

abeza_63
 

Since you only have 3.03 VDC on pin 3, from the output of the 5 volt regulator (IC11), I suggest you measure the
Power source current (12.77 VDC), the normal DC source current when you switch the QCX on is approximately 130MA
(receive mode). If the measured current is  less than 130MA, the regulator is defective and has to be replaced.
There is also a possibility that there might be  defective components dragging down the regulator, that will be indicated
By excessive high power source current and the regulator will be very hot to the touch. I agree with KB1GMX, the
SI 5351 is protected by D1 And D2, due to D2 being reverse bias with a negative voltage applied to it's anode. So, if the source current is less than 130MA, replaced IC11, the output voltage should now be 5VDC, if you still have problem,
We will continue with the troubleshooting.
 
WA2HTF
 
 
 
 

-------Original Message-------
 
Date: 8/24/2019 8:35:31 PM
Subject: Re: [QRPLabs] Plugged QCX power in backwards. Smoke. Reflashed new chip. Still no change. What's next? #smoke #qcx
 
Nik

Thank you for your response to my issue! I do see the top row of blocks on the LCD screen which according to the troubleshooting guide indicates that the microprocessor is not communicating with the screen properly. On a whim, I decided to reinstall the original processor that came with the board and was victim to my ignorance of plugging  thepower in backwards. I went ahead with instructions on how to update the firmware and it seems that the upload was successful according to the AVR program. To me, that indicates that the processor was not fried during the mishap

I used these instructions. They do not mention setting the fuses. 

https://www.qrp-labs.com/images/qcx/HowToUpdateTheFirmwareOnTheQCXusingAnArduinoUNOandAVRDUDESS.pdf

 will check IC11 like you mentioned and report back to you. Thanks again!
 

Re: #40m #TVI #DTV #U3S #WSPR Freeview Interference #40m #tvi #dtv #u3s #wspr

 

Seems I missed this website..

https://www.qsl.net/g4wpw/filters.html

73 de Andy

Re: #40m #TVI #DTV #U3S #WSPR Freeview Interference #40m #tvi #dtv #u3s #wspr

 

On Sat, Aug 24, 2019 at 11:43 PM, Nik wrote:
I concluded that not all BB's are equal.
You beat me to it Nik.
If search the web then I see lots of people using ferrite rings as "braid breakers".
To me, a braid breaker is the one with the coupled coaxial loops.
For some reason, I don't see this referred to so I can't point to anywhere useful.
But I guess the usual radio handbooks and manuals would have a chapter on them.

73 de Andy