Re: 50+ Watts am for QCX...
This story brought back memories of a
10x 1625 "amp" me and one of my ham buddies built back in the
mid-60's.? We were 15 year olds with fresh General? licenses and
figured we could make anything work.
It didn't come close to working but the
way it eat up 1625's was entertaining, there would be a little hot
spot on a plate that would travel around until the plate
disintegrated.?? What fun, so we would turn it off and stick in
another 1625 (we had a 50 or so) and watch it burn up.
Eventually we dispensed with turning it
off to add a new victim.? That worked until my pinkie found it's
way to contact one of the loose plate caps and I found myself
flying across the room. smelling of burnt hair.
73 Jack KZ5A
On 4/23/2019 7:52 PM, Steve Ireland
wrote:
toggle quoted message
Show quoted text
Hi Hans
?
I applaud your ingenuity and QRO does have its place
alongside QRP ¨C 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 ¨C 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
?
Sent: Wednesday, April 24, 2019 12:29 AM
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
|
Re: 50+ Watts am for QCX...
I like the similar design by Don Huff W6JI which won the QST homebrew challenge back in 2009 or so.
Joe
On Tue, Apr 23, 2019 at 9:52 PM Steve Ireland < vk6vz@...> wrote:
Hi Hans
?
I applaud your ingenuity and QRO does have its place alongside QRP ¨C 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 ¨C 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
?
Sent: Wednesday, April 24, 2019 12:29 AM
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
|
|
|
On Tue, Apr 23, 2019 at 11:38 AM, Harv - K2PI wrote:
Reduced bandwidth? ?Happy if it keeps the RTTY contests from taking over the CW sub-bands. ?
From
Experience will tell what may be the best strategy for selecting dial frequencies during contests, and for how many ~3 kHz segments should be used for FT4 on each band. As initial guidelines we suggest the following default dial frequencies for FT4: 3.595, 7.090, 10.140, 14.140, 18.104, 21.140, 24.919, 28.180, 50.318, 144.170 MHz. We will welcome any feedback that could lead to better frequency choice
I guess that these are dial frequencies for USB, and I'm not sure what freq offset WSJT-X uses.
- Andy -
|
Me too! Code Quick was a fantastic way to learn the code.?
|
Hi Jens
For now at least its even simpler than that:
Non-QCX to Non-QCX 1 point
Non-QCX to QCX? ? ? 3 points
QCX to non-QCX? 1 point
QCX to QCX? ?3 points?
Hope to catch you on Monday for 3 points!?
73
Peter GM0EUL
|
Hi Olaf
Love the post. And the hunter/B-52 analogy.?
But what is "KI" please?
73 Hans G0UPL? ?
Haha...ok.. welcome to the ultmate world of? KI driven? full automated contest...
The advantage is... it is easy to teach a KI to fulfill the bandplans... ?? but this mode is a add on to FT-8 ... not a sub... ? so bet on it, we will lose again some kHz? CW? only band... ? ?
The old? order? 'use it or lose it'????? is hopeless against?? 24/7?? possible automated stations...????? and? as we all know the bandplan council loves to count transmitters in the air and contacts logged in Webdatabases... ? ?
But I learned.. ? listen long.. ? listen careful...? watch the bands.. and after that done again..... do a QSO... ? so 99 % of by band use is listening... ?? Just compare a hunter sitting in the bush just to spot? the rare bird with a? B-52? dropping it's bomb down the wood and check the ash for the DNA of the rare bird...? and who have a nice picture showing a Ham CW op? against? a KI driven? digital station.??? .. and yes.. you get it.. the B-52 drops? the bomb even if there is a hunter sitting in the bush...
Don't get me wrong..??? I use also FT-8? JST65 etc...?? but not for contacts that are expected to be bring in a nice S/N ...?? but i want to get into contact with someone .. not with something ..
just my 2 cents...
Olaf / DL5YBZ
|
Hi Alan :),
After I start JS8CALL, I monitor ALL.TXT.
A simple graphing tool could monitor propogation by plotting 'snr' of the individual stations.
Another tool could present live conversations.
Both would add a lot to the JS8 presentation.
I just turned JS8 on. No response to my @allcall query call transmission.
I guess most folks don't leave their RPi JS8 boxes on.
John
toggle quoted message
Show quoted text
On Wed, 24 Apr 2019, Alan de G1FXB via Groups.Io wrote: 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 -
|
Haha...ok.. welcome to the ultmate world of? KI driven? full automated contest...
The advantage is... it is easy to teach a KI to fulfill the bandplans... ?? but this mode is a add on to FT-8 ... not a sub... ? so bet on it, we will lose again some kHz? CW? only band... ? ?
The old? order? 'use it or lose it'????? is hopeless against?? 24/7?? possible automated stations...????? and? as we all know the bandplan council loves to count transmitters in the air and contacts logged in Webdatabases... ? ?
But I learned.. ? listen long.. ? listen careful...? watch the bands.. and after that done again..... do a QSO... ? so 99 % of by band use is listening... ?? Just compare a hunter sitting in the bush just to spot? the rare bird with a? B-52? dropping it's bomb down the wood and check the ash for the DNA of the rare bird...? and who have a nice picture showing a Ham CW op? against? a KI driven? digital station.??? .. and yes.. you get it.. the B-52 drops? the bomb even if there is a hunter sitting in the bush...
Don't get me wrong..??? I use also FT-8? JST65 etc...?? but not for contacts that are expected to be bring in a nice S/N ...?? but i want to get into contact with someone .. not with something ..
just my 2 cents...
Olaf / DL5YBZ
|
Dear Peter,
good idea to simplify.
To state it even clearer, does that mean:
QCX to non-QCX 1 Point
non-QCX to QCX 1 Point
QCX to QCX 3 Points
Right?
73 de Jens, DG2FDD
|
I'm new to Wspr. I plan to buy a QRP Labs kit for Wspr. Is there a tutorial on how to set it up and use it? And which one should I purchase? Gary, The U3S is for WSPR, among many other modes. Can be setup for all bands, just one or many sequentially. The manuals are comprehensive, help from this group very good. Assuming you also want to receive the RX module should be added or use your shack RX with WSJT-X. I think some use the CQX but that is more of a compromise. 73 Alan G4ZFQ
|
Re: QCX Battery Voltage Indicator
Hi Samuli
Did you connect a wire from the DVM pin to the power supply? Forgetting this is the most common reason for empty icon...
73 Hans G0UPL? ?
Was this ever solved for you? I have the same problem with my unit. Battery indicator always shows empty. Although the radio is working fine.
|
Re: 50+ Watts amp for QCX...
Hello Allison?
Three things that kill MOSFETS fast, as in BANG!
Excessive gate drive, Excessive drain voltage, Excessive drain current.
Pick any one!
With the MOSFETs I was using I didn't think any of those should apply. I think sloppy layout and the enormous gate capacitance may have contributed to cause oscillation instability that caused one of the three!
My PP HF amp using 2 irf510s as linear with 28V on 40M will do easily 55W (at 2W drive)
and during initial build blast testing with 4W I got to 85W (at 32V)into the load, pushing
further I fried the devices but at 38V and 4W it did do 110W, for about 10 seconds.? Clearly
that was class C Saturated power.? Replaced the pair and since then (2006) dialed the PS back
to 28V with 4A current limit I've not fried any?despite opens, shorts and other oops errors.
I nominally run at 40-45W using it.? Gain is about 14DB without attenuator and the
attenuator is about 2.5db (matches my radios) and max drive is under 2W.? ?Look at
the WA2EBY/K5oor design.
Yes my results closely match yours. I estimated a 15dB gain (Class C bias) and my attenuator is ~4dB so 4W deom the QCX comes in a bit under 2W. All very close...
I wasn't trying for Linear operation only CW. Otherwise there's a few components I wouldn't have omitted, and I would of course increase the bias to get some decent idle current. And more attention on layout.
I have studied the OZ1PIF 6m amp too. These IRF510s are great devices indeed, when treated right.
Was great fun!
73 Hans G0UPL?
|
I bookmarked the quick code web site home page for consideration.
Thanks Chris KK6LOP chrisbuyer@...
On Tuesday, April 23, 2019, 6:30:07 PM EDT, N5VMO Pat <n5vmo00@...> wrote:
YES !
I love the idea on Monday April the 29th =)?? I will be ready on my OCX-20 as /P outside my apartment front door in my camp folding chair and table with a fresh set of AA batteries in the holder =)?? With my #2 box pencil and write - n - rain book for logging =)
I still love the "Code Quick" by Dr. Weaver - SK =)?? He trained a many young recruit in a fast time in basic military communications =)
--
|
Re: 50+ Watts am for QCX...
Hi Hans
?
I applaud your ingenuity and QRO does have its place alongside QRP ¨C 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 ¨C 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
?
toggle quoted message
Show quoted text
Sent: Wednesday, April 24, 2019 12:29 AM
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
|
Re: 50+ Watts am for QCX...
Three things that kill MOSFETS fast, as in BANG!
Excessive gate drive, Excessive drain voltage, Excessive drain current.
Pick any one!
FYI 25V to 28V is the ceiling for 100V fets under most high SWR or reactive switching
conditions.? At 30V and higher I've gotten more power but at the expense of higher
probability for failure under adverse conditions like high SWR.
My PP HF amp using 2 irf510s as linear with 28V on 40M will do easily 55W (at 2W drive)
and during initial build blast testing with 4W I got to 85W (at 32V)into the load, pushing
further I fried the devices but at 38V and 4W it did do 110W, for about 10 seconds.? Clearly
that was class C Saturated power.? Replaced the pair and since then (2006) dialed the PS back
to 28V with 4A current limit I've not fried any?despite opens, shorts and other oops errors.
I nominally run at 40-45W using it.? Gain is about 14DB without attenuator and the
attenuator is about 2.5db (matches my radios) and max drive is under 2W.? ?Look at
the WA2EBY/K5oor design.
If you want serious power out, OZ1PIF 4x4 of IRF510 and it does a nice 200+W at 6M
at 28V for one module.? He runs two with combiners!
Oh, 5W into 50 ohms is more than a IRF510 can take without it immolation.? Keep the?
applied gate voltages under 12V (DC plus RF peak) or else.
Allison
|
?Based on astute observation and several private email
My choice of ...7076... The QCX QRP? DSB? FT8? 40m Water Hole
was a very bad choice
?Now ... until further agreed upon :>)
Call 7086 The QCX QRP? DSB FT8 WaterHole
That way neither sideband (upper or lower) QRMs an established mode
John
N3AAZ
|
Re: O/T what happened to M0XPD Blog?
Andy / Graham
Ok, Not an audience? of one.
Just a very niche blog....
Regarding the general drivel, are you not interested in
seeing somebodies Utube Xmas day excitement to unboxing their
Flex6500???????
Alan
On 22/04/2019 13:42, Graham wrote:
toggle quoted message
Show quoted text
I too had noticed.
I just assumed it was as Andy suggests.? Interests change,
blogs come and go.
cheers, Graham ve3gtc
On 4/22/2019 11:28, Andy Brilleaux
via Groups.Io wrote:
Maybe there is just nothing new to write about ?
I'm find over the last 12 months that all newsgroups / blog /
forums seem to be MUCH lower
in activity.
Amateur radio *news* websites barely have anything worth
reading.
People making videos about "What is an S-Meter" and other drivel
- yawn.
Or maybe they are too busy having fun on the bands for a change
to write anything ;-)
As Mr Dylan once said "the answer my friend is blowin' in the
wind"..
- Andy -
|
Thanks Graham,
I think my Google fu must of being on vacation
Not sure how the NT7S work passed me by, unless I assumed it was matching hits for the WSPR code..
I'll have a look, libraries are generally several magnitudes out of my depth.
At best I can cobble two bits of well commented existing code together. Maybe blink & something to sound a speaker in sympathy.
Opening up the search description gave plenty of hits for other platforms,
some blue pill's & and blue pills to maintain excitement not necessarily WSJX related......
FYI, if it's of any use.
running on ARM platform, but employing a 5351 and chose to use a Hans reference frequency of choice 27Mhz as well!
originally conceived as a home built Antenna Analyser
with the addition of
Inbuilt Touchscreen keyboard and WSPR, FT8, JT65, JT9
Alan
toggle quoted message
Show quoted text
On 22/04/2019 13:38, 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 -
|
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
toggle quoted message
Show quoted text
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 -
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Peter GM0EUL
Alan de G1FXB