Hi Terry,
Adjustment for consistent timing errors is of 20MHz reference frequency,?? menu option 8.6
A brief how to, is on page 101 of the current assembly manual.

Alan

On 24/04/2019 18:05, terry murphy via Groups.Io wrote:

My Qcx40 looses about 10 seconds every 48 hours.
Is there an adjustment I am missing?



de W6LEO??

My Qcx40 looses about 10 seconds every 48 hours.
Is there an adjustment I am missing?



de W6LEO??

Hi Hans

?

I applaud your ingenuity and QRO does have its place alongside QRP – a lot of us do both.

?

In regard to exploding mosfets, about 15 years ago a good friend, with my dubious assistance, built a couple of versions of Dave Pick G3YXM’s Throbbatron amplifier – see ?

?

In the original version, after eating a couple of FETs, my mate got the amplifier working nicely and stably on 160m CW by using quite a lot of bias, but I foolishly and insistently kept pressing him to get it working on SSB as well.

?

He then rebuilt the amp with lots of safety features, removed the bias and, hey presto, it ate IXFH58N20s in a fairly spectacular and absolutely continuous manner.? The amp now sits in a corner of my shed looking sad.

?

There is a lot of black magic and luck when it comes to making FET amps. What we learnt is if you get one working, don’t change the design!!!

?

Vy 73

?

Steve, VK6VZ/G3ZZD

?

From: Hans Summers

Sent: Wednesday, April 24, 2019 12:29 AM

To: [email protected]

Subject: [QRPLabs] 50+ Watts am for QCX...

?

Hi all

?

A lighthearted intermission, that I hope you enjoy, discussing first "WHY" then the story of explosions, fireworks... and finally a successful and simple junkbox amplifier producing over 50W RF from a QCX-40.

?

See

?

73 Hans G0UPL

Virus-free.

Hi John,

Hi John,
No problem on typo, I'm guilty as well.
The 428 runs 8051 architecture?? it's good, but I wondering if reliving the 1990's was the solution.

I remember the first time, where all the "spare" space gone on my HDD? check out the size of that all.text file......... :-[

Alan

On 23/04/2019 10:18, jmh6@... wrote:

Hi All,
? Yes, I mis typed. AT328 seems to be the processor of choice. Nice that QCX uses a DIP version.
? My interest in JS8 is that the ASCII data source keyboard or whatever can use the same RF transmitter. I am curious what sort of range I could get with a mag. loop as the transmit antenna?
? The receiver can be a 'normal' JS8 setup. The data sent winds up as ASCII in the ALL.TXT file on the receiving end. I suppose another QCX could be used as the RF frontend or just a regular transceiver.
? Something more to do on a rainy day :).
? Lost of fun :).
? warm regards,
? John
On Mon, 22 Apr 2019, Graham wrote:

Jason NT7S has JT8 encoding in his jtencode library for the Arduino and also has his si5351a library.
both are quite popular with experimenters, are "do all" libraries (i.e. quite large) and work. I have no experience using other than the WSPR encoding function of his jtencode library however.
cheers, Graham ve3gtc
On 4/22/2019 10:57, Alan de G1FXB via Groups.Io wrote:

Thanks John,
Just to make sure is it a typo or am I missing a something subtle. Are we both still talking ATmega328 or you really an AT428? (Nearest ATmtel match AT89LP428??)
NOT recently but, (would be for betaFT8 not JS8) I looked for code running on specifically on an existing Ardunio platform (I'm not a code guy)
for a Adafruit 5351 offshelf building block solution, and could not find any hence the interest.
Alan
On 22/04/2019 00:47, jmh6@... wrote:

Hi Alan,
?? My understanding is that known good AT428 code exists to encode FT8. JS8 uses the same format with a different sync sequence and somewhat different encoding. From what I can tell the pieces are essentially all there. Just gotta glue them together? Or as one of my friends put it, it is all SMOP [Small matter of programming :)].
?? I am thinking your ASCII keyboard sends serial characters to a pin on the QCX and as long as the QCX buffer has characters they are encoded as packets and sent. Simple.
?? No transceive for now.
?? John
On Sun, 21 Apr 2019, Alan de G1FXB via Groups.Io wrote:

Hi John,
FT8 / JS8 built into a QCX is an interesting challenge.
More so depending if your development aims to maintain backward CW
Transceive capability or new Digimode Transmit only?
As it stands on transmit? the QCX knows little about the outside world
beyond what's provided by the straight / paddle key inputs which is
coincidently shared with an optionally connected GPS.
When you say:-
"? You can also easily experiment with remote JS8 data collection sorts of
things by just sending ASCII to the remote QCX. "
If the "ASCII characters" are not already present in the NMEA Sentence,
what's the route in to the ATmega328?
I'll be interested in the QCX encode link when you find it.
Alan
On 20/04/2019 16:33, jmh6@... wrote:
????? Hi All,
????? ?? I have an interest in making QCX and other QRP-LABS products
????? send JS8.
????? ?? The idea being that you send ASCII characters to the QCX and
????? it forms JS8 packets and sends them as long as there are
????? characters in the buffer.
????? ?? I that way your typing goes out maybe a different antenna and
????? you can receive JS8 with your normal XCVR and computer at the
????? same time :).
????? ?? You can also easily experiment with remote JS8 data
????? collection sorts of things by just sending ASCII to the remote
????? QCX.
????? ?? There is source code already on the web that runs in the QCX
????? though off hand I don't remember where and haven't compiled and
????? run it myself yet.
????? ?? Generating JS8 directly with the 5351 should give a very
????? clean RF signal since the RF is created directly by that chip.
????? ?? Is anyone else interested?
????? ?? John
????? On Sat, 20 Apr 2019, Andy Brilleaux via Groups.Io wrote:
??????????? On Sat, Apr 20, 2019 at 12:46 PM, Alan G4ZFQ wrote:
??????????? ????? Serves you right:-) Built for Windows so you
??????????? can have some of
??????????? ????? the updating pain we have?
??????????? Ironically, pre-built binaries for Raspberry Pi's
??????????? (including v2.01) work
??????????? fine ;-)
??????????? But for those of us using our daily work machines,
??????????? on stable and LTS support
??????????? code bases were completely disowned in favour of OS
??????????? versions that are barely
??????????? out of beta testing.
??????????? - Andy -