Date   

Re: Miracle Whip and the QCX

George Korper
 

The Kewpie Mayo and the Miracle Whip Antenna both seem 
to have a 'magic moment'  quality like the QCX itself, that gets to the heart as well as the mind.

I will use WSPR in the next few weeks to test both Allison and Andy's idea. The Miracle Whip
guts were highly well crafted, and it is a good base to work from. I think the small, puny radials may well affect the radiation angle
and the longer radiator, say 12 feet on 40 will work as well as using it on a Tarheel. like we do on field day which marks a huge difference. 

I have another tiny well crafted device, that is on Amazon. A 9:1 balun for receive only, that really picks up signals on random listening antennas. 
It's like they said on the first Men in Black movie. "Humans have trouble seeing that something very small, might be very powerful."

On Thu, May 28, 2020 at 6:08 AM g4edg via groups.io <G4edg=aol.com@groups.io> wrote:
A few years ago I took on the task of disposing of amateur radio belonging to a good friend of mine who had recently died. I took a whole load of stuff along to a local rally/ham flea market to sell, I had to make two trips to the car to get all the stuff to the bring and buy stand, when I returned the second time I noticed that the Miracle Whip I had placed in the foyer had disappeared..stolen..my initial emotion was that of anger, but soon changed to a bit of a smile and thinking to myself "Well, good luck with that pal...that's your amateur radio career off to the worst possible start!"

Every cloud.....

73 Steve G4EDG 


Re: Bad news #40m

Trystan G0KAY
 

Joe,

Sorry to hear that you've blown the finals. Fear not, I've blown mine on two occasions now. On both times was when I had put it into WSPR mode and there was no antenna connected. 

The fact that I did it on two occasions show that I am consistently stupid. At least consistency is a virtue. 

Fear not then Joe! Tell us what parts you have replaced so far, and what you can hear when you try and receive. If you give us as much information as you can think of I'm sure the group can help you get back on air again with your QCX. 

Trystan
G0KAY


Re: [help] Only noise being seen while IQ balance / phase lo / phase hi.

dl8lrz
 

Hi Jose,
i think:
first: IC10
PIN4 - connected to ground, must be 0V. Check why no 0V (bad solder joint, conductor path interrupted, measured correctly ??)
IC9:
PIN3 is 5V over 750k (r35). If PIN1 is roughly 5V, everything is ok.
IC9B, IC8, IC7, IC6, IC5:
The voltages depend on the voltage of the FST3153 (IC4, PIN7,9). It is best to measure whether IC5/IC7 PIN1 and IC9/PIN7 are ok. I think 2.5V is ok.
Conclusion:
The QCX noises, the volume can be adjusted with volume - So IC8-10 works first.
The voltages at IC6.7 suggest that IC5.6.7 also work (2,5V).
Align 8.1: Here about 7030kHz 8.2: 700Hz 8.3: 600Hz 8.4: 800Hz
8.7 Peak BPF: Press Select - loud tone must be generated. If only noise, then the path SI5351 - IC3C - filter T1 - FST3253 or CLK0 / CLK1 is disturbed
(many have faults on the connections T1). Only if a maximum is found with C1, then:
IQ balance: adjust with R27. If there is no minimum, the path BPF (T1) - FST3253 - IC5,6,7 or CLK0 / CLK1 is strongly asymmetrical or defective

If no balance tone is produced, check:
- Is the transmitter working? (use dummy!) -> test for IC1 and IC3
- Connect antenna, change frequency. Is some (weak) reception or just noise?

vy 73 Reiner DL8LRZ


Re: ProgRock + TCXO + GPS Stability/Accuracy

Hans Summers
 

Hello Giuseppe

Setting register 3 to zero affects how often the frequency is updated. It does NOT affect how often the EEPROM is updated, using the Reference Clock value held in RAM. 

The calibrated Reference Clock value held in RAM is only written to EEPROM if the difference between the existing EEPROM value and the RAM value exceeds 10Hz. Therefore in practice the EEPROM is updated rarely. 

73 Hans G0UPL
http://qrp-labs.com

On Thu, May 28, 2020 at 10:27 AM Giuseppe Marullo <giuseppe@...> wrote:
Hi Hans,

this is what is written in the manual:

"If you set the register to have a value of 0, then the microcontroller
will adjust the Si5351A output frequencies once per second, every
second, depending on whether it thinks the 27MHz frequency has drifted
upwards or downwards. This continuous change in output frequency may not
be desirable. It is more practical to have small jumps in output
frequencies, less often – i.e. only when the reference oscillator has
changed by more than a threshold.
The QRP Labs website has some notes on how to obtain excell"

How often I could expect the eeprom to be written if I set the register
3 to 0?
Could you recommend 24/7 operation?

TIA

Giuseppe Marullo
IW2JWW - JN45RQ

On 5/28/2020 8:45 AM, Hans Summers wrote:
> Hi Giuseppe
>
> FYI the ProgRock does not write to EEPROM once per second. It only
> writes to EEPROM once in a while when the error (stored ref freq value
> to actual value held in RAM) exceeds a threshold. So writing to EEPROM
> is quite rare and does not wear out the EEPROM (rated 100,000 cycles
> in the datasheet; I saw some practical experiments on an ATmega328 to
> try and destroy the EEPROM and it actually lasted nearer to 1 million
> in practice).
>
> I have a beta ProgRock version which allows update of the frequency
> via the serial port, without writing the registers to EEPROM - so that
> would be useful in an application where the constructor wishes to do
> things like repeated frequency sweeps, and not wear out the EEPROM.
>
> 73 Hans G0UPL
> http://qrp-labs.com
>
> On Thu, May 28, 2020 at 5:39 AM Giuseppe Marullo <giuseppe@...
> <mailto:giuseppe@...>> wrote:
>
>     Hi Sid,
>
>     I know that some people got their "quirks" with the accuracy of this,
>     you were not the only one looking back the ML.
>     I have received a new MCU, to rule out eeprom wear, since I kept it
>     powered several weeks and if fhe eeprom is written once a second,
>     well I
>     expect it not to work anymore, theoretically it will die after
>     27hours.
>     I was past 10x this period, easily.
>
>     My problem is not that it is not spot on on 10MHz. The problem is
>     that
>     it stays about 2.4Hz below 10MHz of my Trimble. It is almost
>     constant,
>     like either my Trimble is not 10MHz and it is stable, let's say it
>     is @
>     10.0000024MHz, or ProgRock decides that 9.9999976MHJz is the right
>     frequency. I am evaluating getting another source for my lab, if I
>     could
>     acquire at a decent price. Unfortunately there is no visible feedback
>     from the ProgRock about what is really doing, if it consider itself
>     within range or what.
>
>      >The most common "solution" recommended is to replace the xtal
>     with a
>     TCXO which is no solution that simply masks the problem. That's the
>     discipline...use a clock source that does not drift!!
>     Hehe, mind to give me a DigiKey part number with less than 12
>     digits in
>     the price column? Everything drifts within a hobbyist budget, that
>     the
>     point in the disciplined part of their name.
>     I am already using QRPLabs TCXO BTW.
>
>     Waiting to perform the surgery on the ProgRock, then I will
>     analyze the
>     PSU too(didn't check it yet). Not much left to look at though.
>
>     I am building some GPIB interfaces to connect the frequency
>     counter and
>     log data programmatically, it will take 2-3weeks tough, waiting for
>     AR488 pcb to arrive.
>
>     Giuseppe Marullo
>     IW2JWW - JN45RQ
>
>
>
>
>




Re: Miracle Whip and the QCX

g4edg
 

A few years ago I took on the task of disposing of amateur radio belonging to a good friend of mine who had recently died. I took a whole load of stuff along to a local rally/ham flea market to sell, I had to make two trips to the car to get all the stuff to the bring and buy stand, when I returned the second time I noticed that the Miracle Whip I had placed in the foyer had disappeared..stolen..my initial emotion was that of anger, but soon changed to a bit of a smile and thinking to myself "Well, good luck with that pal...that's your amateur radio career off to the worst possible start!"

Every cloud.....

73 Steve G4EDG 


Re: A great QCX-QCX contact and salute to youth

Hans Summers
 

Yes Steve

I visited Okinawa in June 2016... lovely place! It did rain 3 days out of the 4 I was there. But at least the rain was warm :-)

73 Hans G0UPL 

On Thu, May 28, 2020, 12:32 Steve in Okinawa <sfab43@...> wrote:
No argument from me on this, not least because I rediscovered ham radio here in Japan. (My wife's father was JA9BB. He went SK just before I met her, but left his shack intact for me to eventually bring to Okinawa.) And I feel very lucky to have ended up on this subtropical island, populated by the sweetest people in the world!


Re: A great QCX-QCX contact and salute to youth

Steve in Okinawa
 

No argument from me on this, not least because I rediscovered ham radio here in Japan. (My wife's father was JA9BB. He went SK just before I met her, but left his shack intact for me to eventually bring to Okinawa.) And I feel very lucky to have ended up on this subtropical island, populated by the sweetest people in the world!


Re: ProgRock + TCXO + GPS Stability/Accuracy

Alan G4ZFQ
 

The problem is that it stays about 2.4Hz below 10MHz of my Trimble.
Giuseppe,

This is what I found, I was not sure if it was because I usually use a 26MHz reference.
However recently I tried with the standard 27MHz crystal and a 27MHz TCXO, in both cases the GPS set it about 2Hz low at 14.996MHz.
Checked against a GPS reference and RWM.

73 Alan G4ZFQ


Re: IRF510 #alignment

Erwin - PE3ES - F4VTQ
 

@allison
instead of slapping the pcb and probably breaking things you can try to use a small wooden toothpick when the solder is hot. The solder does not stick to the wood and the hole is clean and free.


Re: ProgRock + TCXO + GPS Stability/Accuracy

Giuseppe Marullo
 

Hi Hans,

this is what is written in the manual:

"If you set the register to have a value of 0, then the microcontroller will adjust the Si5351A output frequencies once per second, every second, depending on whether it thinks the 27MHz frequency has drifted upwards or downwards. This continuous change in output frequency may not be desirable. It is more practical to have small jumps in output frequencies, less often – i.e. only when the reference oscillator has changed by more than a threshold.
The QRP Labs website has some notes on how to obtain excell"

How often I could expect the eeprom to be written if I set the register 3 to 0?
Could you recommend 24/7 operation?

TIA

Giuseppe Marullo
IW2JWW - JN45RQ

On 5/28/2020 8:45 AM, Hans Summers wrote:
Hi Giuseppe

FYI the ProgRock does not write to EEPROM once per second. It only writes to EEPROM once in a while when the error (stored ref freq value to actual value held in RAM) exceeds a threshold. So writing to EEPROM is quite rare and does not wear out the EEPROM (rated 100,000 cycles in the datasheet; I saw some practical experiments on an ATmega328 to try and destroy the EEPROM and it actually lasted nearer to 1 million in practice).

I have a beta ProgRock version which allows update of the frequency via the serial port, without writing the registers to EEPROM - so that would be useful in an application where the constructor wishes to do things like repeated frequency sweeps, and not wear out the EEPROM.

73 Hans G0UPL
http://qrp-labs.com

On Thu, May 28, 2020 at 5:39 AM Giuseppe Marullo <giuseppe@marullo.it <mailto:giuseppe@marullo.it>> wrote:

Hi Sid,

I know that some people got their "quirks" with the accuracy of this,
you were not the only one looking back the ML.
I have received a new MCU, to rule out eeprom wear, since I kept it
powered several weeks and if fhe eeprom is written once a second,
well I
expect it not to work anymore, theoretically it will die after
27hours.
I was past 10x this period, easily.

My problem is not that it is not spot on on 10MHz. The problem is
that
it stays about 2.4Hz below 10MHz of my Trimble. It is almost
constant,
like either my Trimble is not 10MHz and it is stable, let's say it
is @
10.0000024MHz, or ProgRock decides that 9.9999976MHJz is the right
frequency. I am evaluating getting another source for my lab, if I
could
acquire at a decent price. Unfortunately there is no visible feedback
from the ProgRock about what is really doing, if it consider itself
within range or what.

 >The most common "solution" recommended is to replace the xtal
with a
TCXO which is no solution that simply masks the problem. That's the
discipline...use a clock source that does not drift!!
Hehe, mind to give me a DigiKey part number with less than 12
digits in
the price column? Everything drifts within a hobbyist budget, that
the
point in the disciplined part of their name.
I am already using QRPLabs TCXO BTW.

Waiting to perform the surgery on the ProgRock, then I will
analyze the
PSU too(didn't check it yet). Not much left to look at though.

I am building some GPIB interfaces to connect the frequency
counter and
log data programmatically, it will take 2-3weeks tough, waiting for
AR488 pcb to arrive.

Giuseppe Marullo
IW2JWW - JN45RQ





Re: QCX, QLG1, v1.05 ... WSPR?

 

Thanks for that, Hans,
I won't worry, then; everything else is working perfectly.

The battery backup is a really nice touch: I can swap the GPS unit between my two QCXs and it picks right up again in seconds.

Julian N4JO.


Re: QCX, QLG1, v1.05 ... WSPR?

Hans Summers
 

Hi Julian
 
But my GPS data still isn't showing up properly on either unit.... Anybody else experience that?

This is a known issue which has been mentioned several times in this group. There is some kind of timing race condition where the display update occurs BEFORE all the data has been received from the GPS. It must be somehow location dependent since I have hardly ever seen it here. 

This applies to all the firmware revisions of the QCX. It has not been tackled by me yet. But it is not a serious issue, just a cosmetic thing in the GPS Info display screen. 

So... don't worry about it

73 Hans G0UPL
http://qrp-labs.com


Re: ProgRock + TCXO + GPS Stability/Accuracy

Hans Summers
 

Hi Giuseppe

FYI the ProgRock does not write to EEPROM once per second. It only writes to EEPROM once in a while when the error (stored ref freq value to actual value held in RAM) exceeds a threshold. So writing to EEPROM is quite rare and does not wear out the EEPROM (rated 100,000 cycles in the datasheet; I saw some practical experiments on an ATmega328 to try and destroy the EEPROM and it actually lasted nearer to 1 million in practice). 

I have a beta ProgRock version which allows update of the frequency via the serial port, without writing the registers to EEPROM - so that would be useful in an application where the constructor wishes to do things like repeated frequency sweeps, and not wear out the EEPROM. 

73 Hans G0UPL
http://qrp-labs.com

On Thu, May 28, 2020 at 5:39 AM Giuseppe Marullo <giuseppe@...> wrote:
Hi Sid,

I know that some people got their "quirks" with the accuracy of this,
you were not the only one looking back the ML.
I have received a new MCU, to rule out eeprom wear, since I kept it
powered several weeks and if fhe eeprom is written once a second, well I
expect it not to work anymore, theoretically it will die after 27hours.
I was past 10x this period, easily.

My problem is not that it is not spot on on 10MHz. The problem is that
it stays about 2.4Hz below 10MHz of my Trimble. It is almost constant,
like either my Trimble is not 10MHz and it is stable, let's say it is @
10.0000024MHz, or ProgRock decides that 9.9999976MHJz is the right
frequency. I am evaluating getting another source for my lab, if I could
acquire at a decent price. Unfortunately there is no visible feedback
from the ProgRock about what is really doing, if it consider itself
within range or what.

 >The most common "solution" recommended is to replace the xtal with a
TCXO which is no solution that simply masks the problem. That's the
discipline...use a clock source that does not drift!!
Hehe, mind to give me a DigiKey part number with less than 12 digits in
the price column? Everything drifts within a hobbyist budget, that the
point in the disciplined part of their name.
I am already using QRPLabs TCXO BTW.

Waiting to perform the surgery on the ProgRock, then I will analyze the
PSU too(didn't check it yet). Not much left to look at though.

I am building some GPIB interfaces to connect the frequency counter and
log data programmatically, it will take 2-3weeks tough, waiting for
AR488 pcb to arrive.

Giuseppe Marullo
IW2JWW - JN45RQ





Re: A great QCX-QCX contact and salute to youth

John Andersson <jolopup@...>
 

I agree with Hans, went to Japan for training at NEC and Pioneer for work - unbelievable experience - so much for the crap posted about the Japanese people !
BEST experience I ever had in any country visited for work.... 

Virus-free. www.avg.com


On Thu, 28 May 2020 at 16:32, Ted 2E0THH <qrp@...> wrote:
But I have to say the 5.5 years I spent in Japan were definitely some of the best, most enjoyable, most educational and mind-expanding, really fantastic years of my life. It was a really amazing experience and I am very grateful to have had the opportunity. Japan and the Japanese people will always hold a special place in my heart. 

Seconded!

73sTed

2E0THH


Re: A great QCX-QCX contact and salute to youth

Ted 2E0THH
 

But I have to say the 5.5 years I spent in Japan were definitely some of the best, most enjoyable, most educational and mind-expanding, really fantastic years of my life. It was a really amazing experience and I am very grateful to have had the opportunity. Japan and the Japanese people will always hold a special place in my heart. 

Seconded!

73sTed

2E0THH


Re: A great QCX-QCX contact and salute to youth

Ted 2E0THH
 

Steve
What an inspiring story - well done!

Andy
Not much more than us in the UK (assuming your are, from your impending OBE)
I've spent a great deal of time there, in the '50s they introduced an entry level licence (way ahead of the rest of us) and it proved to be the most successfully licence in the world. I think licencing costs a bit more than it does here, but then everything does.
Given the young man's age, he may still be on this licence. Like here with the Foundation Licence, it may impose restrictions on operating a transmitter you have constructed yourself unless it is a commercial kit that satisfies OFCOM's totally confusing IR2028 (which of course, the QCX does). He may only have been seeking similar clarification.

73s Ted

2E0THH


Re: A great QCX-QCX contact and salute to youth

 

Hi Hans, Andy (while the British contingent are having a rag chew here...) 
And then Turkey happened...

You're warmly invited to share that story too :-)

Julian N4JO.


Re: A great QCX-QCX contact and salute to youth

Hans Summers
 

Hi Andy

Hahahah... well I was born in London and had never lived more than 50 miles from my birthplace. Until 2011... then XYL and I suddenly ended up about as far from London and in about as different a culture as you could ever imagine. Neither of us had ever been to Japan before and we didn't know anyone for thousands of miles in any direction. Talk about a leap of faith into the unknown! 

Well no country is perfect, everywhere has its good points and bad points, though of course we humans have a great tendency to "the grass is always greener on the other side" syndrome. But I have to say the 5.5 years I spent in Japan were definitely some of the best, most enjoyable, most educational and mind-expanding, really fantastic years of my life. It was a really amazing experience and I am very grateful to have had the opportunity. Japan and the Japanese people will always hold a special place in my heart. 

I could go on about this for hours so just stop me now :-)  Suffice it to say - if you get a chance to visit Japan, go for it... and I think generally the whole experience of living in another country is in many ways a really beneficial thing, though dragging one far outside of one's comfort zone!

73 Hans G0UPL

On Thu, May 28, 2020 at 8:58 AM Andy Brilleaux [O.B.E. pending] via groups.io <punkbiscuit=googlemail.com@groups.io> wrote:
Thanks for the insight Hans.
Makes me grateful for living in the UK for a change.
And with that, I'll gracefully slide out of this one ;-)


Re: QCX/QCX+ Serial number 10,000 auction for fun

Hans Summers
 

Hi Al 
QCX/QCX+ sales just passed the 10,000 number.
I'm sure this is practically impossible to know, but has any QRP kit radio ever done this? Maybe HW-8? Truly impressive, Hans!

I wonder if the Elecraft K2 reached that milestone? It's gotta be close. But you won't get one of those for $55!

Congrats!

Thanks! 

I have the greatest respect for Elecraft, their ethos, design, everything. But yes, they are at the opposite end of a price range to QRP Labs Hi hi. 

As far as I know: the K2 was introduced in 1999 and I remember reading somewhere (though my memory could be inaccurate - correct me if I am wrong, please!), the K2 sales did indeed pass the 10,000 milestone - but that took 20 years. 

The QCX took only 2.75 years to cross that milestone :-)

But we are of course comparing apples and oranges, it's not really a fair comparison at all. It's normally the case that sales volume and price tend to be inversely proportional. 

73 Hans G0UPL
http://qrp-labs.com


Re: A great QCX-QCX contact and salute to youth

Andy Brilleaux [O.B.E. pending] <punkbiscuit@...>
 

Thanks for the insight Hans.
Makes me grateful for living in the UK for a change.
And with that, I'll gracefully slide out of this one ;-)