Does it run the sample program named Blink that comes with the IDE?
Jack, W8TEE
On Tuesday, August 14, 2018, 9:45:21 PM EDT, Howard Fidel <sonic1@...> wrote:
I was hopping I could pick someone's brain before I start to experiment with the code I am running on my Arduino. My Arduino nano died, and I just replaced it with a new one. (I tried to socket it, but the pins didn't plug into any sockets I have.) The code hangs at the version number. Is there anything going on that the code looks for that it is not seeing to move on? I know how to add print statements to see if I can locate where the problem is, but if someone has seen this, maybe you could save me some time.
Thanks,
Howard
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Re: Modular uBitx - "Ex: Harmonics"
This is what we used for the antenna analyzer (QST, Nov., 2017). The only reason I switched away from it was its clock speed. At 16MHz, it just wasn't up to the DSP power we needed.
Jack, W8TEE
On Tuesday, August 14, 2018, 9:57:21 PM EDT, Adrian Waiblinger <vk5zbr@...> wrote:
Keep a option for 630m band too.? If to hard an output from the Nano to drive the external 630m pa relay /?
On 15 Aug 2018, at 10:44 am, Nick VK4PP < nickpullen@...> wrote: One of these? 
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O sorry for the mistake Allison. Good? understanding with good equipment(I have NWT for spectrum). By the way 8-crystal Chebyshev filter will have just the same input/ output impedunce and it is not need to change transformes as for 4-pole SMD 45 MHz filter(570 Om). Thanks George.?
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Dear Mr Howard, when I some how killed my Arduini Nano I didn't know what to do but I've find small programme XLoader and with it help managed to load HEX file from KD8CEC for mBITX transceiver - good working programme. May be it'll help you. George RX3ARG/UR4CRG
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uBitx v4 plus 3 AGC kits and 3 Pop Fix kits for sale
I have a new, unbuilt v4 uBitx kit, complete in its original plastic box, including a Raduino with a socketed Nano and the normal parts kit.? Aside from a brief visual inspection when I received the package, the uBitx kit has been untouched.? I just haven't had the time to mess with it.
I also have 3 of the Kees/Don AGC kits (unbuilt) and 3 of the Kees/Don Pop Fix kits (also unbuilt).
My daughter's college tuition is due, so I'm selling all the above for $140 shipped.? I will ship via medium Priority rate box anywhere in the continental US.? Payment via paypal, please.
If you are interested, please contact me using my callsign at arrl.net.
Many thanks,
Carl, K0MWC
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I was hopping I could pick someone's brain before I start to experiment with the code I am running on my Arduino. My Arduino nano died, and I just replaced it with a new one. (I tried to socket it, but the pins didn't plug into any sockets I have.) The code hangs at the version number. Is there anything going on that the code looks for that it is not seeing to move on? I know how to add print statements to see if I can locate where the problem is, but if someone has seen this, maybe you could save me some time.
Thanks,
Howard
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Re: Modular uBitx - "Ex: Harmonics"
HI All.
Blue Pill looks to be a winner too me, I have 2 laying about actually. VERY cheap, 2x the nano memory. and 32bit.
Should fit the bill perfectly, extra IO too. (26)
Just got to get the Code running on it, Jack?
Cheers
Nick VK4PP
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Re: Modular uBitx - "Ex: Harmonics"
Nice idea Nick, Jack, I'm currently doing a HF rig based on works from the book by EI9GQ. [ Not a qrp rig. No real attampt to lower Rx current)] I first built all the sections as DIY boards then consolidated them into the magic 100x100mm for Chinese supplier. Receiver is working, low level Tx side all tested up to 1W level.??? Uses 9MHz crystal filters available on ebay at least for now, from a "Telrad" board. Might possibly build own filter also as the Telrads are bit wide. No CW. Band pass filters plug into a 100x100 motherboard and are used in Rx and Tx modes. I'm not suggesting we go down this road but that the idea of using 100x100mm boards has a lot of merit. I'm yet to decide on the control Micro but for initial testing uses a NANO and Si5351. Your suggestion Jack to use a more capable Micro is a good one.  BPF, one fitted to mother board. 
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Re: Modular uBitx - "Ex: Harmonics"
One of these?
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Re: Modular uBitx - "Ex: Harmonics"
Hi Jack,?
Thanks for the ideas.
99.99x99.99 for board size.
I was thinking maybe the Arduino Nano 2560 Mini Pro, About $13... lots of IO...
But then, with the nano, when using I2C, there are 6 extra IO ports. Its just program memory...
I did want to limit FW changes, I was hoping to only have to change the code relating to LPF and BPF...
I'm thinking 5 LPFs and BPF that are switched in. Builder selects the 5 bands they want to operate on and builds the radio/software for that...
The more I think this over the bigger it becomes.
Farhan has achieved so much already! I would only do stuff if he was OK with it,
Cheers,
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Allison
Inductors are interesting in Spice simulations.? Usually the amount of resistance in a couple
feet of AWG-20 is so insignificant as to have any large effect on performance.? I used to be
extra careful to calculate this resistance and include it in my simulations but leaving it off
doesn't seem to make much difference.? In any case it would be easy to add that for the final
design activity.
Recently I have been wondering if ESR for capacitors might be more important.? Next time
around I may try including that in the component definitions.
The classic Cauer or Elliptical filter does not have a resistor in series with the trap part, but
inserting some small resistance there does have visible effect of making the notch broader
and less deep (lower attenuation factor).? As mentioned earlier this is my first attempt an an
elliptical filter.? While the notch part is nice it might be better if the peak or BPF part were a
bit more peaked.
A couple other people have recently contacted me regarding use of LTSpice to build and
test filters.? It is a fun aspect of circuit simulation, and one that makes it easy to try new
ideas and architectures.? You do not have to be an EE to do trial-and-error filter designs.?
Arv
_._
On Tue, Aug 14, 2018 at 6:14 PM ajparent1/KB1GMX < kb1gmx@...> wrote: Arv,
It might.? The spur tuneable cover 350khz span (the 15m band).
Also the inductor are the "perfect" or real?? If real the resistance
has to include what typical for a real inductor.
Allison
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Re: Modular uBitx - "Ex: Harmonics"
All:
I think this makes a lot of sense, but I'd want Farhan to be involved so we don't kill of HF Signals important business in India. I do know it would keep costs down a bunch is the boards are a maximum of 100mm x 100mm, as that's the price bump point for a lot of PCB houses. I can't say much about the hardware, but I would suggest additional horsepower for the software. The Nano has relatively few I/O pins, is fairly slow, and has very limited memory resources. The Protoneer is 3x as fast and has 4x the SRAM, which is a primary bottleneck. The Blue Pill is another alternative. I would, however, strongly urge that the controller be capable of using the Arduino IDE for code development. More pins would enable more experimenting, too, probably to everyone's benefit.
I would also argue for an I2C or SPI display interface, simply because we're seeing the Nextion, Jim Sheldon's display, the JackAl board by AC8GY and myself, and probably others extending the basic display. Those interfaces also reduce the pins necessary for the interface compared to some LCD displays.
I would be happy to help with the software end of things, and I will be releasing JackAl to Open Source when it's ready. This could really be interesting!!
Jack, W8TEE
On Tuesday, August 14, 2018, 8:37:48 PM EDT, Nick VK4PP <nickpullen@...> wrote:
Hi Allison/ Kees/ Glenn/ other technical competent hams...
Would you consider working on a uBitx v2 so to speak, advice, criticisms and such?
Tweaking the current design as much as possible to perform better, address the major issues (spurs + harmonics)??
Better components (2n2222a) ect,
Extra driver stage?
LPF layout..
proper BPF using QRP Labs Modules..
I would like to make it very modular, so its easy to fix/upgrade a section.
I will make some boards, happy to send to you for testing and evaluation at no cost.
Also smaller boars fit in a DL envelope (110x220mm) for DX shipping at $3.50. so that kind of defines the foot print.
Would be cool, 4 boards each about 105x105mm Stacking on one another.
Nano socketed on one board, SI5153 integrated, either SMT or Adafruit module ($$$ vs convenience)
I am not aiming to build a cheap copy, just an upgraded uBitx that you can assemble your self if you don't mind spending a bit more.
I want to enjoy the process and the radio, learn stuff along the way, contribute to the community.
As soon as this is no longer happening, there is no point in carrying on for me.
What are your thoughts people?
Cheers & 73.
Nick VK4PP?
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Modular uBitx - "Ex: Harmonics"
Hi Allison/ Kees/ Glenn/ other technical competent hams...
Would you consider working on a uBitx v2 so to speak, advice, criticisms and such?
Tweaking the current design as much as possible to perform better, address the major issues (spurs + harmonics)??
Better components (2n2222a) ect,
Extra driver stage?
LPF layout..
proper BPF using QRP Labs Modules..
I would like to make it very modular, so its easy to fix/upgrade a section.
I will make some boards, happy to send to you for testing and evaluation at no cost.
Also smaller boars fit in a DL envelope (110x220mm) for DX shipping at $3.50. so that kind of defines the foot print.
Would be cool, 4 boards each about 105x105mm Stacking on one another.
Nano socketed on one board, SI5153 integrated, either SMT or Adafruit module ($$$ vs convenience)
I am not aiming to build a cheap copy, just an upgraded uBitx that you can assemble your self if you don't mind spending a bit more.
I want to enjoy the process and the radio, learn stuff along the way, contribute to the community.
As soon as this is no longer happening, there is no point in carrying on for me.
What are your thoughts people?
Cheers & 73.
Nick VK4PP?
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Arv,
It might.? The spur tuneable cover 350khz span (the 15m band).
Also the inductor are the "perfect" or real?? If real the resistance
has to include what typical for a real inductor.
Allison
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Nick VK4PLN,
Not any form of bitx not even remotely close.
?
I can share the design but no?board(s), layouts or indented parts list will
be made.? ?Since I set no budget limit it will?rely on the vast amount of
unobtainium my parts supply contains.?
Basis will be only 4 bands 80/40/20/10 only, SSB only, portable, battery operation?
not?more than 10W.? ?Finish sometime, depends on distractions.? Power amp
and basic receiver working.
Allison
Unobtainium, Noun: stuff you just can't buy or cost both legs should one be found.
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Hi, For what i understand reading advices on ebay sellers, TJC is chinese version only (specific fonts ...) not usable elsewhere, Nextion is worlwide usable.
73 - Remi - F1MQJ
Pour ce que je comprend en lisant les vendeurs eBay, TJC est la version chinoise (polices specificques ...) non utilisable ailleurs, Nextion est la version mondialement utilisable.
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Re: Chassis Wiring Twisted/Braided?
Clark...
Thanks for the comment.? I will continue with my twisting related wire construction.
I remeber seeing Ethernet cables with twisted pairs but I never realized they had different TPI's.
de George
WD0AKZ
dit - dit
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Re: Low Power Output for Hendricks BitX20A - Watt meters and Scope readings do not agree....
#bitx20
Leonard
Very good video.? For those who were not around several years ago, Leonard KC0WOX
played a large part i popularizing the BITX and in helping others build and fix their own BITX
transceivers.? His videos are as relevant now as they were back then.?
During the past few years the QRPKits company of Doug KI6DS has been transfered to
Pacific Antenna, and the BITXxxA series seems to have been dropped from production.?
The BITXxxA assembly manuals are still available from Pacific Antenna/QRPKits
Arv
_._
On Tue, Aug 14, 2018 at 3:42 PM Leonard < dredger@...> wrote: Here's a video of a Hendrix BITX20a looking at the modulation, carrier balance and harmonics rejection. I'm not an expert but I believe my way of testing is relatively accurate.
I start out with 16 watts power out. The 20a has push-pull output so gives more power and good second harmonic rejection.
This was made 10 years ago or so. The 20a is available from It is considerably more expensive though. Arv had a big hand in the design and testing of the kit.
Leonard
kc0wox
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On Wed, Aug 15, 2018 at 05:21 AM, ajparent1/KB1GMX wrote:
I'm starting a new clean sheet
project
HI Allison. I was wondering if you were up to something along these lines... uBitx V2,0? I hope you would share you design so others could reproduce. I am dying to scratch build a uBitx type radio.? You definitely appear to have an excellent grasp on what needs to be done to build on the existing uBitx to create an even better multiband QPR radio. 73 Nick VK4PLN.
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George
Nick VK4PP