Farhan has posted Gerbers for Raduino. I guess one can order few boards from China for their personal use. I have also uploaded a homebrew friendly single sided board for making PCB by toner transfer.
Rahul VU3WJM
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My surprising success with the click kit has emboldened me to go ahead and try building Kees ND6T AGC kit. ?I want to build a simple version without any extra controls and I am confused as to the wiring of the in and out wires. ?ND6T has a nice drawing of how to do this with a control but not how to do so without a control. ?I think out goes to K1 pin 12 via RG-174 coax and in goes to K3 pin 14 via RG-174. ?Is that correct? ?Also I swear I saw somewhere that a trace needs to be cut but now I can't find that.
Any helps greatly appreciated as I continue to learn how to deal with itsy bitsy SMD stuff.
73, Bill NZ0T
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Re: My New CNC engraved front arrived
Very nice!??
I ordered my fathers day present yesterday ().
What are you using to generate the artwork & gerber files?? I do not have a large surplus of funds...? Looking for programs for Windows 10 environment...
Much obliged?
de N5LXK
73
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Re: Ubitx and Sherwood rx tests
the contemporary method of rating the goodness of a receiver is now down to a single test : reciprocal mixing dynamic range. simply stated, you have? very low distortion crystal oscillator amplified to +10 dbm and fed through a very stiff low pass filter. Then you use this as the input to a receiver and tune away by 20 KHz and measure the increase in noise, with the +10dbm signal switch on and off.? this will measure the phase noise as well as blocking dynamic range, as well as (indirectly, though) the IIP3.? The other parameter is the in-channel dynamic range. That is, what is the range of signals that the radio can handle simultaneously within the audio pass-band. currently, 90 db is the winner. Finally, there is the most important though completely unquantifiable quality of how operator fatigue. How much tired will you be after listening to the radio for 10 hours continuously?? A great vintage radio that satisfies these is the Drake TR4. Sherwood is all praise for them. Even to this day, an analog VFO based radio with? decent audio chain will run circles around the Flex6700. Try a microR2 if you can get hold of one. - f
On Sun, Jun 17, 2018 at 2:31 AM, ajparent1/KB1GMX <kb1gmx@...> wrote: Sherwood only tests receivers so the only must have mod is the RX AGC ND6T flavor.
All the hot receivers are SDR and direct digital sample (flex, and Anan) thought the
7300 (also a SDR) is up there.
Of the radios using more conventional analog techniques two of mine the Atlas?
and the TT 340 are fair comparisons for single conversion.? The Tentec is the
only low IF with selectable filters at 9mhz to digital IF unlike those with VHF
first IFs.??Of those three the? listed radios Tentec Eagle, Atlas 215X,
Tentec 340/Triton? on the list in that order from best to worst.? This radio
without AGC is not likely to be above any of them.? Also the Atlas 215X a
1976ish design is a diode mixer front end like the uBitx with?and AGC in
the IF and a diode mixer for product detector so it would compare
closest to the uBitx.??
Note: In dollars none of those radios even as used/broken approach 100$
and new were much more expensive by many times.
Comparable transceivers in the power class is FT817, IC703 and
Tentec Argonaut QRP series such as the used Argonaut model 505
that I use very regular for the 5W QRP level.
Reasons that is likely:
RX overload point, the limit here being the diode mixer.?
Filters First (45mhz) is wide and the second is fixed at SSB bandwidth.
close in and wide overload
Phase noise from the LO systems (LO1, LO2, BFO).
Sensitivity is never an issue.??
Allison
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Hello. How are you?
Mr. I need the program of the mini arduino of my bitx40. since the one that I had was burned and I had to change it. your help is appreciated
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RoughTranslation:
Hello, I need the raduino program for bitx40, I had to change it for a new one.
hola,?
estimados necesito el programa del raduaido para el bitx40, lo tuve que cambiar por uno nuevo?
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Re: The BITeensio board is here.
#ubitx
just use your phone's camera. I even saw an app that will decode the resistors' colour codes - f
On Mon, Jun 18, 2018 at 12:30 AM, Gwen Patton <ardrhi@...> wrote: Jack, I ordered one because of the post here. I have a crappy little USB microscope, but it's a bitch to use for electronics. This was affordable, so I ordered it. It should be here in a couple of days, and I'll let you know how it serves.
Gwen NG3P
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Re: The BITeensio board is here.
#ubitx
Whoops, sorry, Jim. I had already replied to Jack before I saw your post. I'll take further comments to a separate post.
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Re: The BITeensio board is here.
#ubitx
Jack, I ordered one because of the post here. I have a crappy little USB microscope, but it's a bitch to use for electronics. This was affordable, so I ordered it. It should be here in a couple of days, and I'll let you know how it serves.
Gwen NG3P
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Dennis, they are in short supply. Somebody might be willing to let one go for you, however I have created a circuit board design that isn¡¯t the same size but could be used. I could send you the Gerber files and then you simply order the boards from China, wait
one week to receive them,?and build one. ??Additionally there are some folks here who have come up with more elaborate designs that would do many many things¡ª those are orderable already made. ?
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Looking for a factory Raduino. Hoping someone has one they aren¡¯t using. If not, can someone tell me how to get one from the factory? ?LCD is not necessary.?
Thanks
72 and God bless.
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Re: An Apology and clarification
#ubitx
So sorry that your postal system is so destructive, maybe you should contact them instead of this group!
Being a retired Electronic service engineer and college lecturer I suggest that instead of maligning the creators of these radios that do work, you design a radio that will do what these radios do and sell it for $120.? If you can't or won't then please stop whining, it's unbecoming of anyone with an Amateur Radio license, with or without your background!
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Re: My New CNC engraved front arrived
Where did you get that done? Looks fantastic.
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Jerry,
This a topic change???
I put the TX aside for a bit to deal with life, garden, and play with the receiver.
Generally the TX power thing is a hard nut to crack with the physical constraints
and high required gains.? I'll get back to it.?
Where we left off...
Oddly dealing with two other uBITX the simple steps are the good enough.
Those being Farhan's C81 mod (470PF), my better transistor in that spot(BFR106),
and swap out the 3904s with 2n2222A(TO18), add the SMT choke at R86.? More
than that is seriously involved.? For 80 though 17 it really helped and improved 10M.
For most that solves most of their wishes.
One hint: mount all the 2n2222A(to18) from the underside with short leads as that
is easier and opens up the top side for better airflow.?
Allison
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Re: An Apology and clarification
#ubitx
I feel obliged when I see emails like this to chime in.? I apologize in advance if it annoys anyone.
My uBITX is my first HF rig and is the reason I went ahead and completed my Extra.? I saw the price, knew that there was no longer any excuse and ordered it, knowing I had 6-8 weeks to do my part (study and pass my Extra).? My "Junkyard" uBITX has been running flawlessly since it arrived and today I'll top 1000 QSO's with it.? Mostly on FT8, but I'm venturing out and have secretly been practicing my CW CQ in far off areas of 40M (nothing like on-air to raise the stakes) to get my confidence up and managed my first PSK31 earlier.
I've managed to mod my uBITX with Howards awesome and simple power mod, modded to 12.0v logic (TDA8222W) and just this morning added my temperature controlled fan mod (the box fan looming over my uBITX was unseemly).? My parts bins have exploded in size with SMT components, SMT practice boards (thanks for the tip, Jack) leaded things of all sizes and a new solder station.?
I'll add that the entire uBITX experience has been amazing and I'm thankful to Ashhar for creating the completely functional base and everyone else for the full-on, immersive learning environment. Just reading here and asking questions from time to time has been 10x worth the price of admission and I'm thankful for such a treasure trove of knowledge packed in one place, the SNR is simply amazing.
73 Rob AG5OV - The Junkyard uBITX
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On Sun, Jun 17, 2018 at 10:16 am, AG?H wrote:
Also, I had read in one of the posts that re-flashing the Arduino with Ver 1.27 does NOT re-set the original values .? Is that right??
No, all settings will be reset to "factory" values after each version upgrade.
If so, how can I clear out the bad settings?
Power on the radio while keeping the Function Button pressed. This will reset all settings to "factory" values. However I doubt that this will fix the problem. The problem as you describe it, is more likely caused by noise, incorrect wiring, poor grounding or a bad power supply. 73 Allard PE1NWL
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Looking for a factory Raduino. Hoping someone has one they aren¡¯t using. If not, can someone tell me how to get one from the factory? ?LCD is not necessary.?
Thanks
72 and God bless.
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Re: uBitx has a bit too crispy / semi-distorted audio even on low signal levels
#ubitx
#ubitx-help
Ralph,
91p and 82pf are standard values.? I went with 82 and checked afterward.? The filter in mine
went from about 1750ish? and kind of tight at the 6db points to 2280hz which is to me ideal.
The nice part with SMT caps is if you need more, lay them on like bricks, so 82+6.8 might be
what someone else needs.? They are available down to .1pf.
Rather than sweep it with SA I used a noise source at the antenna and looked at the audio
out with an audio FFT program (windows people use spectran).? You can also use that to
set the BFO. THe Elecraft K2 builders have used that trick for years.
Allison
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Re: An Apology and clarification
#ubitx
Ladies and gentlemen, Mr. Koster has had a bit of bad luck with the mail delivery; I¡¯m not sure if he used DHL or not. ? ?I don¡¯t think we are likely to make this gentleman happy despite whatever effort¡¯s¡ª-after reviewing a few posts of his in the past, he
suffers from the same pair that I have at times, being a bit over critical. ?? Perhaps he¡¯s just having a bad day and he had also a few like it in the past.? Best to simply move on, and let him go his way in peace.?
On Jun 17, 2018, at 14:22, ajparent1/KB1GMX < kb1gmx@...> wrote:
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Its what I call moders delight as there are many possible changes to suit a builders
wishes.? The fact that it is SMT is not a hindrance as in this day and age leaded
parts are?much more costly and in some cases unobtainium. The fact that its not
laid out as close as SMT parts would permit is another good thing.
Is it perfect, no, and no pretense either!? It is exactly what I knew it would be because
I participated, read the descriptions, and schematics.??
As to compliance.? For most countries it is the sole responsibility of the licensee.
Rules may differ where you are but here (USA) Amateur Radio is the place where
the operator can build anything that meets basic performance standards.? That
is not permitted in any other radio service hence the responsibility for correct
operation is up to the operator and it applies even if you are running a 7800!
As to the propensity of mods...? Actually there are a few and more opinions on
how to achieve a specific result.? When you have a large group of people
experimenting? you will get many posted ways and means.? Its both nature and
a very collaborative thing.? I happen to enjoy it even if I don't always agree as
it may highlight something I missed or deemed unimportant to me, yet to
others very important.
For its price its a significant piece of hardware.? So what if it has a few warts,
I could easily run any commercial radio down to the latent flaws in those too.
I choose to enjoy it for what it is and have fun or fix them for my personal
enjoyment.
I happen to agree with Jack, quit grumping and do something constructive.
As an expert myself I choose to experiment and mod to my hearts content.
Larry,
I use geezer glasses too.? Getting old is hard on the body but sometimes makes
us smarter and wiser.? Have fun, and don't burn you're nose.?
Allison
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Re: An Apology and clarification
#ubitx
Larry,
For those that don't want to spend $$ for a nice stereoscopic microscope (which I still suggest is worth it) try the . For several years I have enjoyed the student grade surgical loupes but the addition of the extra lenses make it a pleasure. I use everything available, "geezer goggles", surgical loupes, SolderScope, and even plain magnifiers. Do whatever it takes. Still a bunch easier than wrestling those wire leads and solder lugs that I used in the 1950's! Additionally, if you don't supply your friends with magnifiers, they can only say "WOW!" when you show off your work. Kinda like building a ship in a bottle. Howdydodat! -Don
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Robert Ogburn
V¨ªctor rodrigo
Gwen Patton
Allard PE1NWL
Don, ND6T